diff --git a/public/react/src/common/components/attachment/AttachmentList.js b/public/react/src/common/components/attachment/AttachmentList.js
index 32c632aa1..1f22b6fcc 100644
--- a/public/react/src/common/components/attachment/AttachmentList.js
+++ b/public/react/src/common/components/attachment/AttachmentList.js
@@ -1,5 +1,5 @@
 import React,{ Component } from "react";
-import { ConditionToolTip } from 'educoder'
+import { ConditionToolTip,getRandomNumber } from 'educoder'
 
 class AttachmentsList extends Component{
   constructor(props){
@@ -15,9 +15,9 @@ class AttachmentsList extends Component{
               <p key={key} className="clearfix mb3">
                 <a className="color-grey fl">
                   <i className="font-14 color-green iconfont icon-fujian mr8"></i>
-                </a>                  
+                </a>
                 <ConditionToolTip title={item.title} condition={item.title && item.title.length > 30 }>
-                  <a href={item.url} className="mr12 fl task-hide" length="58" target={ item.is_pdf && item.is_pdf == true ? "_blank" : "_self" } style={{"maxWidth":"432px"}}>{item.title}</a>
+                  <a href={item.url+getRandomNumber()} className="mr12 fl task-hide" length="58" target={ item.is_pdf && item.is_pdf == true ? "_blank" : "_self" } style={{"maxWidth":"432px"}}>{item.title}</a>
                 </ConditionToolTip>
                 <span className="color-grey mt2 color-grey-6 font-12">{item.filesize}</span>
               </p>
diff --git a/public/react/src/modules/competitions/Competitioncommon/CompetitionCommonChild/CompetitionContentsChart.js b/public/react/src/modules/competitions/Competitioncommon/CompetitionCommonChild/CompetitionContentsChart.js
index 420f83ff1..594eb3c5c 100644
--- a/public/react/src/modules/competitions/Competitioncommon/CompetitionCommonChild/CompetitionContentsChart.js
+++ b/public/react/src/modules/competitions/Competitioncommon/CompetitionCommonChild/CompetitionContentsChart.js
@@ -1,6 +1,6 @@
 import React, { Component } from 'react';
 import {Button,Layout,Tabs,Icon, Card, Avatar, Row, Col ,Table,Badge} from 'antd';
-import {markdownToHTML,getImageUrl} from 'educoder';
+import {markdownToHTML,getImageUrl,getRandomNumber} from 'educoder';
 import axios from 'axios';
 
 const { Content } = Layout;
@@ -69,7 +69,7 @@ class CompetitionContents extends Component{
 		const operations = <div>
 				<Button className={"fr"} type="primary" ghost onClick={()=>this.props.Competitionedit()}>编辑</Button>
 				<Button className={"fr mr20"} type="primary" ghost>
-					<a onClick={()=>this.derivefun(`/competitions/${this.props.match.params.identifier}/charts.xlsx`)}>导出</a>
+					<a onClick={()=>this.derivefun(`/competitions/${this.props.match.params.identifier}/charts.xlsx?${getRandomNumber(true)}`)}>导出</a>
 				</Button>
 			</div>
 		const columns = [
diff --git a/public/react/src/modules/courses/busyWork/CommonWorkDetailIndex.js b/public/react/src/modules/courses/busyWork/CommonWorkDetailIndex.js
index 5c55f8894..5ff11b202 100644
--- a/public/react/src/modules/courses/busyWork/CommonWorkDetailIndex.js
+++ b/public/react/src/modules/courses/busyWork/CommonWorkDetailIndex.js
@@ -1,5 +1,5 @@
 import React, { Component } from 'react';
-import { SnackbarHOC } from 'educoder';
+import { getRandomNumber } from 'educoder';
 import {Link} from 'react-router-dom';
 import {BrowserRouter as Router,Route,Switch} from 'react-router-dom';
 import Loadable from 'react-loadable';
@@ -206,7 +206,7 @@ class CommonWorkDetailIndex extends Component{
     }
     const isAdmin = this.props.isAdmin()
 
-    
+
     let exportParams = {}
     const isListModule = childModuleName == '作品列表';
     // 是列表页
@@ -219,12 +219,12 @@ class CommonWorkDetailIndex extends Component{
     }
     // console.log("普通作业176176176");
     // console.log(params);
-    let exportUrl = `/homework_commons/${workId}/works_list.zip?${queryString.stringify(params)}`
-    let exportResultUrl = `/homework_commons/${workId}/works_list.xlsx?${queryString.stringify(params)}`
+    let exportUrl = `/homework_commons/${workId}/works_list.zip?${queryString.stringify(params)}${params?"&"+getRandomNumber(true):getRandomNumber(true)}`
+    let exportResultUrl = `/homework_commons/${workId}/works_list.xlsx?${queryString.stringify(params)}${params?"&"+getRandomNumber(true):getRandomNumber(true)}`
 		document.title=course_name === undefined ? "" : course_name;
     return (
         <div>
-          <PublishRightnow ref={this.publishModal} showActionButton={false} {...this.props} checkBoxValues={[workId]} 
+          <PublishRightnow ref={this.publishModal} showActionButton={false} {...this.props} checkBoxValues={[workId]}
                 isPublish={true} doWhenSuccess={this.doWhenSuccess} checkBeforePost={this.saveWorkSetting}
                 onToPublishClick={this.onToPublishClick}
           ></PublishRightnow>
@@ -234,8 +234,8 @@ class CommonWorkDetailIndex extends Component{
             modalCancel={this.Downloadcal}
             modalsType={this.state.DownloadType}
           />
-          <PublishRightnow ref={this.endModal} showActionButton={false} {...this.props} checkBoxValues={[workId]} 
-                isPublish={false} doWhenSuccess={this.doWhenSuccess}></PublishRightnow> 
+          <PublishRightnow ref={this.endModal} showActionButton={false} {...this.props} checkBoxValues={[workId]}
+                isPublish={false} doWhenSuccess={this.doWhenSuccess}></PublishRightnow>
 
 
           <div className="newMain clearfix worklist1">
@@ -266,7 +266,7 @@ class CommonWorkDetailIndex extends Component{
                   typelist={homework_status}
                   typesylename={"mt12"}
                 />
-               
+
 
                 {category && <a className="color-grey-6 fr font-16 ml30 mt5 mr20" onClick={this.goback} style={{ marginRight: '26px'}}>返回</a>}
 
@@ -293,24 +293,24 @@ class CommonWorkDetailIndex extends Component{
 
               { noTab !== true && <div className="stud-class-set bor-bottom-greyE floatSpinParent">
                 <div className="mt10 clearfix edu-back-white poll_list pl5">
-                  <Link 
+                  <Link
                         onClick={() => this.setState({moduleName: '作品列表'})}
                         className={`${isListModule ? 'active' : '' } `}
                         to={`/courses/${courseId}/${moduleEngName}/${workId}/list`}>作品列表</Link>
-                  <Link 
+                  <Link
                         onClick={() => this.setState({moduleName: '作业描述'})}
                         className={`${childModuleName == '作业描述' ? 'active' : '' } `}
                         to={`/courses/${courseId}/${moduleEngName}/${workId}/question`}>作业描述</Link>
-                  {view_answer == true && <Link 
+                  {view_answer == true && <Link
                         onClick={() => this.setState({moduleName: '参考答案'})}
-                        className={`${childModuleName == '参考答案' ? 'active' : '' } `} 
+                        className={`${childModuleName == '参考答案' ? 'active' : '' } `}
                         to={`/courses/${courseId}/${moduleEngName}/${workId}/answer`}>参考答案</Link>}
                   <Link
                         onClick={() => this.setState({moduleName: '设置'})}
                         className={`${childModuleName == '设置' ? 'active' : '' } `}
                         style={{paddingLeft:this.props.isAdmin()?'38px':'20px'}}
                         to={`/courses/${courseId}/${moduleEngName}/${workId}/setting`}>{this.props.isAdmin()?"设置":"得分规则"}</Link>
-                  
+
 
                   {/* { this.props.tabRightComponents }  */}
                   <React.Fragment>
@@ -365,16 +365,16 @@ class CommonWorkDetailIndex extends Component{
                         {isAdmin && <a className={"fr color-blue font-16"} onClick={() => this.props.toEditPage(this.props.match.params, workId)}>编辑作业</a>}
 
                         { //
-                        work_statuses && work_statuses.indexOf('关联项目') != -1 && 
+                        work_statuses && work_statuses.indexOf('关联项目') != -1 &&
                         <React.Fragment>
                           <ConnectProject ref="connectProject" {...this.props} connectSuccess={this.connectSuccess}></ConnectProject>
                           <WordsBtn style="blue" className={` font-16 fr`} onClick={() => this.openConnectionProject({ homework_id: workId })}>关联项目</WordsBtn>
                           <WordsBtn style="blue" className={` font-16 fr`} onClick={() => this.props.toCreateProject()}>创建项目</WordsBtn>
                         </React.Fragment>
                         }
-                        
+
                         { //
-                        work_statuses && work_statuses.indexOf('取消关联') != -1 && 
+                        work_statuses && work_statuses.indexOf('取消关联') != -1 &&
                         <WordsBtn style="blue" className={` font-16 fr`} onClick={() => this.cancelConnectionProject( {homework_id: workId} )}>取消关联</WordsBtn>
                         }
 
@@ -390,7 +390,7 @@ class CommonWorkDetailIndex extends Component{
                         {work_statuses && work_statuses.indexOf('修改作品') != -1 && <a className={"fr color-blue font-16"} href={"javascript:void(0)"}
                             onClick={() => { this.props.toWorkPostPage(this.props.match.params, null, true, work_id)}}
                         >修改作品</a>}
-                        {work_statuses && work_statuses.indexOf('补交附件') != -1 && 
+                        {work_statuses && work_statuses.indexOf('补交附件') != -1 &&
                         <React.Fragment>
                         <AccessoryModal
                             {...this.props}
@@ -406,7 +406,7 @@ class CommonWorkDetailIndex extends Component{
                             onClick={this.addAccessory}
                         >补交附件</a>
                         </React.Fragment>
-                        
+
                         }
                     </React.Fragment>
 
@@ -415,7 +415,7 @@ class CommonWorkDetailIndex extends Component{
 
                 {/* 内容区 */}
                 <Switch {...this.props}>
-            
+
                     {/* --------------------------------------------------------------------- */}
 
                     {/* 作业设置 */}
@@ -474,7 +474,7 @@ class CommonWorkDetailIndex extends Component{
             </div>
           </div>
         </div>
-        
+
     )
   }
 }
diff --git a/public/react/src/modules/courses/busyWork/common/TabRightComponents.js b/public/react/src/modules/courses/busyWork/common/TabRightComponents.js
index 41e03d176..e8d89089e 100644
--- a/public/react/src/modules/courses/busyWork/common/TabRightComponents.js
+++ b/public/react/src/modules/courses/busyWork/common/TabRightComponents.js
@@ -1,7 +1,7 @@
 import React,{Component} from "react";
 import { Form, Select, Input, Button,Checkbox,Icon,message,Modal, Table, Divider, Tag,DatePicker,Radio,Tooltip} from "antd";
 import {Link} from 'react-router-dom';
-import { WordsBtn, MarkdownToHtml } from 'educoder';
+import { WordsBtn, getRandomNumber } from 'educoder';
 import axios from 'axios';
 import PublishRightnow from '../PublishRightnow'
 import AccessoryModal from "../../coursesPublic/AccessoryModal";
@@ -44,7 +44,7 @@ class TabRightComponents extends Component{
   }
   /// 确认是否下载
   confirmysl(url){
-    axios.get(url + '?export=true' ).then((response) => {
+    axios.get(url + '&export=true' ).then((response) => {
       if(response.data.status&&response.data.status===-1){
 
       }else if(response.data.status&&response.data.status===-2){
@@ -108,8 +108,8 @@ class TabRightComponents extends Component{
     const isAdmin = this.props.isAdmin()
     const isSuperAdmin = this.props.isSuperAdmin()
 
-    let exportUrl = `/api/homework_commons/${workId}/works_list.zip`
-    const exportResultUrl = `/api/homework_commons/${workId}/works_list.xlsx`
+    let exportUrl = `/api/homework_commons/${workId}/works_list.zip${getRandomNumber()}`
+    const exportResultUrl = `/api/homework_commons/${workId}/works_list.xlsx${getRandomNumber()}`
 
     return(
       <React.Fragment>
diff --git a/public/react/src/modules/courses/competitions/Competitioncommon/CompetitionCommonChild/CompetitionContentsChart.js b/public/react/src/modules/courses/competitions/Competitioncommon/CompetitionCommonChild/CompetitionContentsChart.js
index 420f83ff1..594eb3c5c 100644
--- a/public/react/src/modules/courses/competitions/Competitioncommon/CompetitionCommonChild/CompetitionContentsChart.js
+++ b/public/react/src/modules/courses/competitions/Competitioncommon/CompetitionCommonChild/CompetitionContentsChart.js
@@ -1,6 +1,6 @@
 import React, { Component } from 'react';
 import {Button,Layout,Tabs,Icon, Card, Avatar, Row, Col ,Table,Badge} from 'antd';
-import {markdownToHTML,getImageUrl} from 'educoder';
+import {markdownToHTML,getImageUrl,getRandomNumber} from 'educoder';
 import axios from 'axios';
 
 const { Content } = Layout;
@@ -69,7 +69,7 @@ class CompetitionContents extends Component{
 		const operations = <div>
 				<Button className={"fr"} type="primary" ghost onClick={()=>this.props.Competitionedit()}>编辑</Button>
 				<Button className={"fr mr20"} type="primary" ghost>
-					<a onClick={()=>this.derivefun(`/competitions/${this.props.match.params.identifier}/charts.xlsx`)}>导出</a>
+					<a onClick={()=>this.derivefun(`/competitions/${this.props.match.params.identifier}/charts.xlsx?${getRandomNumber(true)}`)}>导出</a>
 				</Button>
 			</div>
 		const columns = [
diff --git a/public/react/src/modules/courses/exercise/Testpapersettinghomepage.js b/public/react/src/modules/courses/exercise/Testpapersettinghomepage.js
index 63bdbd170..bd5c7867b 100644
--- a/public/react/src/modules/courses/exercise/Testpapersettinghomepage.js
+++ b/public/react/src/modules/courses/exercise/Testpapersettinghomepage.js
@@ -1,7 +1,7 @@
 import React,{ Component } from "react";
 import {Checkbox,Input,Table, Pagination,Menu,Spin} from "antd";
 import {Link,NavLink} from 'react-router-dom';
-import { WordsBtn ,ActionBtn,queryString,getRandomcode} from 'educoder';
+import { WordsBtn ,getRandomNumber,queryString,getRandomcode} from 'educoder';
 import CoursesListType from '../coursesPublic/CoursesListType';
 import '../css/members.css';
 import '../css/busyWork.css';
@@ -177,7 +177,7 @@ class Testpapersettinghomepage extends Component{
 					}
 					console.log("170");
 					console.log(params);
-					const urll=url+`?${queryString.stringify(params)}`;
+					const urll=url+`?${queryString.stringify(params)}${params?"&"+getRandomNumber(true):getRandomNumber(true)}`;
 					axios.get(urll+ '&export=true').then((response) => {
             	if(response===undefined){
             		return
diff --git a/public/react/src/modules/courses/graduation/tasks/GraduationTaskDetail.js b/public/react/src/modules/courses/graduation/tasks/GraduationTaskDetail.js
index 3a4890ece..460841037 100644
--- a/public/react/src/modules/courses/graduation/tasks/GraduationTaskDetail.js
+++ b/public/react/src/modules/courses/graduation/tasks/GraduationTaskDetail.js
@@ -1,5 +1,5 @@
 import React, { Component } from 'react';
-import {getRandomNumber,queryString} from 'educoder';
+import {getRandomNumber} from 'educoder';
 import {Link} from 'react-router-dom';
 import {Tooltip,Menu} from 'antd';
 import Loadable from 'react-loadable';
@@ -519,8 +519,8 @@ class GraduationTaskDetail extends Component{
 								{this.props.isAdmin()? <li className="li_line drop_down fr color-blue font-16 mt20" style={{"paddingLeft":"0px"}}>
 									导出<i className="iconfont icon-xiajiantou font-12 ml2"></i>
 									<ul className="drop_down_menu" style={{"right":"-34px","left":"unset","height":"auto"}}>
-										<li><a onClick={()=>this.child.confirmysl("/graduation_tasks/"+task_Id+"/tasks_list.xlsx")} className="color-dark">导出成绩</a></li>
-										<li><a onClick={()=>this.child.confirmysl("/graduation_tasks/"+task_Id+"/tasks_list.zip")} className="color-dark">导出作品附件</a></li>
+										<li><a onClick={()=>this.child.confirmysl(`/graduation_tasks/"+task_Id+"/tasks_list.xlsx${getRandomNumber()}`)} className="color-dark">导出成绩</a></li>
+										<li><a onClick={()=>this.child.confirmysl(`/graduation_tasks/"+task_Id+"/tasks_list.zip${getRandomNumber()}`)} className="color-dark">导出作品附件</a></li>
 									</ul>
 								</li>:""}
 								{questionslist.work_status===undefined||questionslist.work_status===null||questionslist.work_status.length===0?"":questionslist.work_status.map((item,key)=>{
diff --git a/public/react/src/modules/courses/graduation/tasks/GraduationTaskssetting.js b/public/react/src/modules/courses/graduation/tasks/GraduationTaskssetting.js
index f90ca57f1..476073a9d 100644
--- a/public/react/src/modules/courses/graduation/tasks/GraduationTaskssetting.js
+++ b/public/react/src/modules/courses/graduation/tasks/GraduationTaskssetting.js
@@ -873,7 +873,7 @@ class GraduationTaskssettingapp extends Component{
 	confirmysl(url){
 		debugger;
 		console.log(3);
-		axios.get(url + '?export=true' ).then((response) => {
+		axios.get(url + '&export=true' ).then((response) => {
 			if(response === undefined){
 				return
 			}
diff --git a/public/react/src/modules/courses/graduation/tasks/GraduationTaskssettinglist.js b/public/react/src/modules/courses/graduation/tasks/GraduationTaskssettinglist.js
index c9ef0ec0d..574f92cb2 100644
--- a/public/react/src/modules/courses/graduation/tasks/GraduationTaskssettinglist.js
+++ b/public/react/src/modules/courses/graduation/tasks/GraduationTaskssettinglist.js
@@ -735,7 +735,7 @@ class GraduationTaskssettinglist extends Component{
 			b_order:b_order,
 			search:search,
 		}
-		axios.get(url + '?export=true',{
+		axios.get(url + '&export=true',{
 			params
 		}).then((response) => {
 			if(response === undefined){
diff --git a/public/react/src/modules/courses/graduation/tasks/GraduationTaskssettingquestions.js b/public/react/src/modules/courses/graduation/tasks/GraduationTaskssettingquestions.js
index b15b6fb2f..5e96af4c8 100644
--- a/public/react/src/modules/courses/graduation/tasks/GraduationTaskssettingquestions.js
+++ b/public/react/src/modules/courses/graduation/tasks/GraduationTaskssettingquestions.js
@@ -217,7 +217,7 @@ class GraduationTasksquestions extends Component{
 	confirmysl(url){
 		debugger;
 		console.log(2);
-		axios.get(url + '?export=true').then((response) => {
+		axios.get(url + '&export=true').then((response) => {
 			if(response === undefined){
 				return
 			}
diff --git a/public/react/src/modules/courses/graduation/topics/index.js b/public/react/src/modules/courses/graduation/topics/index.js
index b77b4c096..0161e761a 100644
--- a/public/react/src/modules/courses/graduation/topics/index.js
+++ b/public/react/src/modules/courses/graduation/topics/index.js
@@ -4,7 +4,7 @@ import {Checkbox, Menu, Pagination,Spin} from "antd";
 import Titlesearchsection from '../../common/titleSearch/TitleSearchSection'
 import DownloadMessageysl from "../../../modals/DownloadMessageysl";
 
-import { WordsBtn ,getRandomcode} from 'educoder'
+import { WordsBtn ,getRandomcode,getRandomNumber} from 'educoder'
 import NoneData from '../../coursesPublic/NoneData'
 import Modals from "../../../modals/Modals"
 import axios from 'axios'
@@ -55,7 +55,7 @@ class Boards extends Component{
 
     let {pageSize}=this.state;
     const cid = this.props.match.params.coursesId
-    
+
     let url = `/courses/${cid}/graduation_topics.json?limit=${pageSize}`
     if(searchValue!=""){
       url+="&search="+searchValue
@@ -142,8 +142,8 @@ class Boards extends Component{
         checkBoxValues: _.difference(this.state.checkBoxValues, values)
       })
     }
-  } 
-  
+  }
+
   onItemClick = (item) => {
     const checkBoxValues = this.state.checkBoxValues.slice(0);
     const index = checkBoxValues.indexOf(item.id);
@@ -198,7 +198,7 @@ class Boards extends Component{
     })
   }
   cancelOperateTopic=()=>{
-    this.setState({       
+    this.setState({
       modalsType:false,
       modalsTopval:"",
       modalsBottomval:"",
@@ -257,7 +257,7 @@ onDelete=(index)=>{
         console.log(error)
       })
     }
-    
+
   }else{
     this.setState({
       // delType:true,
@@ -319,7 +319,7 @@ sureDelTopic=()=>{
       }).catch((error)=>{
         console.log(error);
       })
-    }   
+    }
   }else{
     this.setState({
       delType:false,
@@ -335,7 +335,7 @@ onBoardsNew=()=>{
 }
   /// 确认是否下载
   confirmysl(url){
-    axios.get(url + '?export=true').then((response) => {
+    axios.get(url + '&export=true').then((response) => {
       if(response.data.status&&response.data.status===-1){
 
       }else if(response.data.status&&response.data.status===-2){
@@ -376,12 +376,12 @@ onBoardsNew=()=>{
 		this.fetchAll(searchValue,page,status);
 	}
   render(){
-    let { 
-      searchValue, 
-      topicList, 
+    let {
+      searchValue,
+      topicList,
       data,
       course_public,
-      checkBoxValues, 
+      checkBoxValues,
       checkAllValue,
       page,
       totalCount,
@@ -416,7 +416,7 @@ onBoardsNew=()=>{
               (<React.Fragment>
                 {/* 参考普通作业 - 题库选用 */}
                 {/* <WordsBtn style="blue" className="mr30" onClick={()=>this.useFromBank()}>题库选用</WordsBtn> 正式版没有，先隐藏*/}
-                < a  className={"fl color-blue mr30 font-16"} onClick={(url)=>this.confirmysl(`/courses/${this.props.match.params.coursesId}/graduation_topics/export.xlsx`)}>导出</a>
+                < a  className={"fl color-blue mr30 font-16"} onClick={(url)=>this.confirmysl(`/courses/${this.props.match.params.coursesId}/graduation_topics/export.xlsx?${getRandomNumber(true)}`)}>导出</a>
                 {/*<p className="fl"><UseBank {...this.props} {...this.state} object_type={"gtopic"} useBankSuccess={this.useBankSuccess}></UseBank></p> 题库选用*/}
                 <WordsBtn style="blue" className="font-16" onClick={()=>this.onBoardsNew()}>新建</WordsBtn>
               </React.Fragment>):""
@@ -507,9 +507,9 @@ onBoardsNew=()=>{
             :
             <div></div>
           }
-          
-        <div>          
-        </div>        
+
+        <div>
+        </div>
       </React.Fragment>
       )
     }
diff --git a/public/react/src/modules/courses/groupjobbank/GroupPackage.js b/public/react/src/modules/courses/groupjobbank/GroupPackage.js
index e0b220202..1cd0564a2 100644
--- a/public/react/src/modules/courses/groupjobbank/GroupPackage.js
+++ b/public/react/src/modules/courses/groupjobbank/GroupPackage.js
@@ -1,6 +1,6 @@
 
 import React, {Component} from "react";
-import { WordsBtn,on, off, trigger,markdownToHTML,getImageUrl} from 'educoder';
+import { WordsBtn,on, off, trigger,markdownToHTML,getRandomNumber} from 'educoder';
 import {
 	Button,
 	Checkbox,
@@ -23,7 +23,8 @@ class GroupPackage extends Component {
 		}
 	}
 	DownloadOpenPdf=(type,url)=>{
-		type===true?window.open(url):window.location.href=url;
+		let newurl=url+getRandomNumber();
+		type===true?window.open(newurl):window.location.href=newurl;
 	}
 	componentDidMount() {
 		console.log("Groupjobquesanswer");
diff --git a/public/react/src/modules/courses/members/CourseGroupList.js b/public/react/src/modules/courses/members/CourseGroupList.js
index 0db0ae37e..95dcca227 100644
--- a/public/react/src/modules/courses/members/CourseGroupList.js
+++ b/public/react/src/modules/courses/members/CourseGroupList.js
@@ -14,7 +14,7 @@ import CourseLayoutcomponent from '../common/CourseLayoutComponent'
 import Titlesearchsection from '../common/titleSearch/TitleSearchSection'
 import ColorCountText from '../common/titleSearch/ColorCountText'
 
-import { WordsBtn, trigger, on, off, getUrl, downloadFile , sortDirections, NoneData } from 'educoder'
+import { WordsBtn, trigger, on, off, getUrl, downloadFile , getRandomNumber, NoneData } from 'educoder'
 import Modals from "../../modals/Modals";
 
 import DownloadMessageysl from "../../modals/DownloadMessageysl";
@@ -23,7 +23,7 @@ import ChangeRolePop from './ChangeRolePop'
 import CourseGroupListTable from './CourseGroupListTable'
 
 import './studentsList.css'
-/** 
+/**
     角色数组, CREATOR: 创建者, PROFESSOR: 教师, ASSISTANT_PROFESSOR: 助教, STUDENT: 学生
 */
 function CourseGroupList(props) {
@@ -36,7 +36,7 @@ function CourseGroupList(props) {
     const [listRes, setListRes] = useState({})
     const createGroupModalEl = useRef(null);
 
-    const courseId = props.match.params.coursesId    
+    const courseId = props.match.params.coursesId
 
     useEffect(() => {
         fetchAll()
@@ -63,7 +63,7 @@ function CourseGroupList(props) {
     }
     const onConfirm = async () => {
     }
-    
+
     function createGroupImportSuccess() {
 
     }
@@ -83,7 +83,7 @@ function CourseGroupList(props) {
 
     }
     const confirmysl = (url) => {
-        axios.get(url + 'export=true').then((response) => {
+        axios.get(url + '&export=true').then((response) => {
             if(response === undefined){
                 return
             }
@@ -106,7 +106,7 @@ function CourseGroupList(props) {
         console.log(error)
         });
     }
-    
+
     const isAdmin = props.isAdmin();
     const isSuperAdmin = props.isSuperAdmin();
     const isParent = true;
@@ -121,9 +121,9 @@ function CourseGroupList(props) {
     const course_groups = listRes.course_groups
     const current_group_id = listRes.current_group_id
 
-    let exportUrl = `/courses/${courseId}/export_member_scores_excel.xlsx?`; //总成绩
-    let exportUrltwo = `/courses/${courseId}/export_couser_info.xlsx?`; //课堂信息
-    let exportUrlthree = `/courses/${courseId}/export_member_act_score.xlsx?`; //活跃度
+    let exportUrl = `/courses/${courseId}/export_member_scores_excel.xlsx?${getRandomNumber(true)}`; //总成绩
+    let exportUrltwo = `/courses/${courseId}/export_couser_info.xlsx?${getRandomNumber(true)}`; //课堂信息
+    let exportUrlthree = `/courses/${courseId}/export_member_act_score.xlsx?${getRandomNumber(true)}`; //活跃度
     return (
         <React.Fragment>
             <DownloadMessageysl
@@ -140,8 +140,8 @@ function CourseGroupList(props) {
                 showSearchInput={total_count >= 10}
                 searchPlaceholder={ '请输入分班名称进行搜索' }
                 firstRowRight={
-                    <React.Fragment> 
-                    {  // pageType !== TYPE_STUDENTS && 
+                    <React.Fragment>
+                    {  // pageType !== TYPE_STUDENTS &&
                         isSuperAdmin && <React.Fragment>
                         {/* ref="createGroupByImportModal"  */}
                         <CreateGroupByImportModal {...props}
@@ -151,12 +151,12 @@ function CourseGroupList(props) {
                         {/* this.refs['createGroupByImportModal'].setVisible(true) */}
                         <WordsBtn style="blue" className="mr30" onClick={()=> {createGroupModalEl.current.setVisible(true)}}>导入创建分班</WordsBtn>
                     </React.Fragment> }
-                    { 
-                        // pageType !== TYPE_STUDENTS && 
+                    {
+                        // pageType !== TYPE_STUDENTS &&
                         !isCourseEnd && isAdmin && <WordsBtn style="blue" className="mr30" onClick={()=>addDir()}>新建分班</WordsBtn> }
-                    {/* { 
+                    {/* {
                         isAdmin && !isParent && course_group_id != 0 && <WordsBtn style="blue" className="mr30" onClick={()=>deleteDir()}>删除分班</WordsBtn> } */}
-              {/* { 
+              {/* {
                   isAdmin && !isParent && course_group_id != 0 && <WordsBtn style="blue" className="mr30" onClick={()=>this.renameDir()}>分班重命名</WordsBtn> } */}
                 <style>{`
                     .drop_down_menu li a {
@@ -210,7 +210,7 @@ function CourseGroupList(props) {
                 }
                 onPressEnter={onPressEnter}
             ></Titlesearchsection>
-            
+
             {!!none_group_member_count && <div className="mt20 E9F8FF padding20-30 pointer" onClick={() => {props.history.push(`/courses/${courseId}/course_groups/0`)}}>
                 <span>未分班：</span>
                 <span style={{color: '#999999'}}>{none_group_member_count}个学生</span>
@@ -219,17 +219,17 @@ function CourseGroupList(props) {
             </div>}
 
             <Spin size="large" spinning={isSpin}>
-                {course_groups && !!course_groups.length ? 
+                {course_groups && !!course_groups.length ?
                 <div className="mt20 edu-back-white padding20 courseGroupList">
-                
+
                     <CourseGroupListTable
                         course_groups={course_groups}
                         onOperationSuccess={onOperationSuccess}
                         current_group_id={current_group_id}
                         {...props}
-                    ></CourseGroupListTable> 
-                    
-                </div>: 
+                    ></CourseGroupListTable>
+
+                </div>:
                 <NoneData></NoneData>}
             </Spin>
         </React.Fragment>
diff --git a/public/react/src/modules/courses/members/studentsList.js b/public/react/src/modules/courses/members/studentsList.js
index 1f15303f7..542533a5d 100644
--- a/public/react/src/modules/courses/members/studentsList.js
+++ b/public/react/src/modules/courses/members/studentsList.js
@@ -7,7 +7,7 @@ import CourseLayoutcomponent from '../common/CourseLayoutComponent'
 
 import Titlesearchsection from '../common/titleSearch/TitleSearchSection'
 import ColorCountText from '../common/titleSearch/ColorCountText'
-import { WordsBtn, trigger, on, off, getUrl, downloadFile , sortDirections } from 'educoder'
+import { WordsBtn, trigger, on, off, getUrl, getRandomNumber , sortDirections } from 'educoder'
 import Modals from "../../modals/Modals";
 import axios from 'axios'
 import _ from 'lodash'
@@ -24,7 +24,7 @@ const TYPE_COURSE_GOURP_CHILD = 3
 const buildColumns = (that,isParent) => {
   const { course_groups , sortedInfo } = that.state
   let showSorter = isParent==true
-  const courseId = that.props.match.params.coursesId 
+  const courseId = that.props.match.params.coursesId
   const columns=[{
     title: '序号',
     dataIndex: 'id',
@@ -35,7 +35,7 @@ const buildColumns = (that,isParent) => {
     render: (id, student, index) => {
       return (that.state.page - 1) * 20 + index + 1
     }
-  }, 
+  },
   // {
   //   title: '用户id',
   //   dataIndex: 'login',
@@ -48,7 +48,7 @@ const buildColumns = (that,isParent) => {
   //       title={login && login.length > 10 ? login : ''}
   //     >{login}</span>
   //   }
-  // }, 
+  // },
   {
     title: '姓名',
     dataIndex: 'name',
@@ -57,7 +57,7 @@ const buildColumns = (that,isParent) => {
     width:"10%",
     className:"color-grey-6",
     render: (name, record) => {
-      return <a className="color-dark overflowHidden1" target="_blank" 
+      return <a className="color-dark overflowHidden1" target="_blank"
           style={{maxWidth: '120px'}} href={`/users/${record.login}`}>{name}</a>
     }
   }, {
@@ -106,7 +106,7 @@ const buildColumns = (that,isParent) => {
     }
   }
   ];
-  
+
   if (that.hasGroupModule()) {
     that.isStudentPage && columns.push({
       title: '分班',
@@ -126,7 +126,7 @@ const buildColumns = (that,isParent) => {
       if (item.title === "学号") {
         columns.splice(key, 1)
         return true
-      } 
+      }
     })
   }
   const isAdmin = that.props.isAdmin()
@@ -149,7 +149,7 @@ const buildColumns = (that,isParent) => {
       render: (text, record) => {
         return (
           <React.Fragment>
-            <WordsBtn  onClick={() => that.onDelete(record)} style={'grey'}>删除学生</WordsBtn>              
+            <WordsBtn  onClick={() => that.onDelete(record)} style={'grey'}>删除学生</WordsBtn>
             {record.member_roles && record.member_roles.length && <ChangeRolePop
               style={{ marginLeft: '12px' }}
               courseId={courseId}
@@ -164,7 +164,7 @@ const buildColumns = (that,isParent) => {
         )
       },
     })
-    
+
   }
 
   return columns;
@@ -223,11 +223,11 @@ class studentsList extends Component{
           })
         }
       }else {
-        
+
         // this.props.showNotification(`正在下载中`);
         // window.open("/api"+url, '_blank');
         this.props.slowDownload(url)
-        
+
         // getUrl() + "/api"+
         // const fileUrl = url;
 
@@ -263,7 +263,7 @@ class studentsList extends Component{
       DownloadMessageval:undefined
     })
   }
-  
+
   inputStudent=(e)=>{
     this.setState({
       StudentList_value:e.target.value
@@ -307,7 +307,7 @@ class studentsList extends Component{
       modalCancel:false
     })
   }
-  
+
   onChange=()=>{
 
   }
@@ -344,7 +344,7 @@ class studentsList extends Component{
     this.fetchCourseGroups()
     this.fetchAll()
   }
-  
+
   addStudentSuccessListener=(e, data)=>{
     const params = JSON.parse(data)
     this.props.updataleftNavfun()
@@ -358,10 +358,10 @@ class studentsList extends Component{
     // console.log('addStudentSuccessListener', data)
   }
   fetchCourseGroups = () => {
-    const courseId = this.props.match.params.coursesId    
-    
+    const courseId = this.props.match.params.coursesId
+
     let url = `/courses/${courseId}/all_course_groups.json`
-    
+
     axios.get(url, {
     })
     .then((response) => {
@@ -382,7 +382,7 @@ class studentsList extends Component{
       this.setState({checkBoxValues: [], checkAllValue: false })
 
       this.fetchAll(1)
-    } 
+    }
     // 加载了2次
     // else if (prevProps.coursesids != this.props.coursesids) {
     //   this.fetchAll(1)
@@ -392,7 +392,7 @@ class studentsList extends Component{
     this.setState({
       isSpin:true
     })
-    let id = this.props.match.params.coursesId    
+    let id = this.props.match.params.coursesId
     let course_group_id = this.props.match.params.course_group_id
 
     const { coursesids } = this.props
@@ -424,7 +424,7 @@ class studentsList extends Component{
     }
     axios.get(encodeURI(url)).then((result)=>{
       if (result.data.students) {
-        this.setState({ 
+        this.setState({
           students: result.data.students,
           total_count: result.data.students_count,
           course_group_name: result.data.course_group_name,
@@ -468,7 +468,7 @@ class studentsList extends Component{
     })
   }
   onPageChange = (page) => {
-    this.fetchAll(page)    
+    this.fetchAll(page)
     this.setState({ checkAllValue: false })
   }
 
@@ -490,7 +490,7 @@ class studentsList extends Component{
       return;
     }
 
-    let id = this.props.match.params.coursesId    
+    let id = this.props.match.params.coursesId
     let { order, searchValue }=this.state
     let url=`/courses/${id}/transfer_to_course_group.json`;
     axios.post((url), {
@@ -541,7 +541,7 @@ class studentsList extends Component{
       // content: `确认要删除所选的${len}个学生吗？`,
       content: `是否确认删除?`,
       onOk: () => {
-        let id = this.props.match.params.coursesId    
+        let id = this.props.match.params.coursesId
         let url=`/courses/${id}/delete_from_course.json`;
         axios.post((url), {
           students: [{course_member_id: record.course_member_id}] // this.state.checkBoxValues.map(item => {return {course_member_id: item} }),
@@ -563,7 +563,7 @@ class studentsList extends Component{
     trigger('groupAdd', this.props.coursesids)
   }
   doAddToDir = async () => {
-    const courseId = this.props.match.params.coursesId    
+    const courseId = this.props.match.params.coursesId
     const url = `/courses/${courseId}/join_course_group.json`
     const course_group_id = this.props.match.params.course_group_id
 
@@ -578,12 +578,12 @@ class studentsList extends Component{
   }
   addToDir = (record) => {
       this.props.confirm({
-      
+
           content: `是否确认加入分班: ${this.state.course_group_name}?`,
 
           okText: '确认',
           cancelText: '取消',
-          
+
           onOk: () => {
               this.doAddToDir()
           },
@@ -604,7 +604,7 @@ class studentsList extends Component{
         </div>,
       onOk: () => {
         const course_group_id = this.props.match.params.course_group_id
-        const courseId = this.props.match.params.coursesId    
+        const courseId = this.props.match.params.coursesId
 
         const url = `/course_groups/${course_group_id}.json`
         axios.delete(url)
@@ -616,7 +616,7 @@ class studentsList extends Component{
         })
         .catch(function (error) {
           console.log(error);
-        });    
+        });
       }
     })
   }
@@ -643,7 +643,7 @@ class studentsList extends Component{
     const isCourseEnd = this.props.isCourseEnd()
     let {
       page,
-      
+
       order,
       StudentList_value,
       stu_new_flag,
@@ -662,16 +662,16 @@ class studentsList extends Component{
     let currentOrderName = '学生学号排序'
     if (order == ORDER_BY_GROUP) {
       currentOrderName = '分班名称排序'
-    } 
+    }
     const { coursesids } = this.props
     const course_group_id = this.props.match.params.course_group_id
     const isParent = !course_group_id || course_group_id == coursesids
     const { course_group_name, invite_code } = this.state;
 
-    const courseId = this.props.match.params.coursesId    
-    let exportUrl = `/courses/${courseId}/export_member_scores_excel.xlsx?`; //总成绩
-    let exportUrltwo = `/courses/${courseId}/export_couser_info.xlsx?`; //课堂信息
-    let exportUrlthree = `/courses/${courseId}/export_member_act_score.xlsx?`; //活跃度
+    const courseId = this.props.match.params.coursesId
+    let exportUrl = `/courses/${courseId}/export_member_scores_excel.xlsx?${getRandomNumber(true)}`; //总成绩
+    let exportUrltwo = `/courses/${courseId}/export_couser_info.xlsx?${getRandomNumber(true)}`; //课堂信息
+    let exportUrlthree = `/courses/${courseId}/export_member_act_score.xlsx?${getRandomNumber(true)}`; //活跃度
 
     const params = {}
     if (course_group_id) {
@@ -685,7 +685,7 @@ class studentsList extends Component{
     }
     let paramsString = ''
     for (let key in params) {
-      paramsString += `${key}=${params[key]}&`
+      paramsString += `&${key}=${params[key]}&`
     }
     exportUrl += paramsString;
     exportUrltwo+=paramsString;
@@ -725,7 +725,7 @@ class studentsList extends Component{
 				}
 			)
 		}
- 
+
     return(
       <React.Fragment >
         <DownloadMessageysl
@@ -735,7 +735,7 @@ class studentsList extends Component{
           modalsType={this.state.DownloadType}
         />
         <Titlesearchsection
-          title={isParent ? (pageType == TYPE_STUDENTS ? "全部学生" : "学生列表"): 
+          title={isParent ? (pageType == TYPE_STUDENTS ? "全部学生" : "学生列表"):
             <React.Fragment>
               <span>
                 <Tooltip title="返回至分班列表">
@@ -756,9 +756,9 @@ class studentsList extends Component{
                   <i class="iconfont icon-fuzhi font-14 ml10 copybtn" style={{color: '#FF6800', cursor: 'pointer', verticalAlign: 'baseline'}} data-clipboard-text={invite_code} ></i>
                   </span>
                 </Tooltip>
-              </React.Fragment>  
+              </React.Fragment>
               }
-              
+
             </React.Fragment>
           }
           searchValue={ searchValue }
@@ -766,24 +766,24 @@ class studentsList extends Component{
           showSearchInput={total_count >= 10}
           searchPlaceholder={ '请输入姓名、学号进行搜索' }
           firstRowRight={
-            <React.Fragment> 
-              {/* { 
-                // pageType !== TYPE_STUDENTS && 
+            <React.Fragment>
+              {/* {
+                // pageType !== TYPE_STUDENTS &&
                 !isStudentPage && isSuperAdmin && <React.Fragment>
                   <CreateGroupByImportModal ref="createGroupByImportModal" {...this.props}
                     createGroupImportSuccess={this.createGroupImportSuccess}
                   ></CreateGroupByImportModal>
                   <WordsBtn style="blue" className="mr30" onClick={()=> this.refs['createGroupByImportModal'].setVisible(true)}>导入创建分班</WordsBtn>
                 </React.Fragment> } */}
-              
-              { 
+
+              {
                   !isStudentPage && isAdmin && !isParent && course_group_id != 0 && <WordsBtn style="blue" className="mr30" onClick={()=>this.deleteDir()}>删除分班</WordsBtn> }
-              { 
+              {
                   !isStudentPage && isAdmin && !isParent && course_group_id != 0 && <WordsBtn style="blue" className="mr30" onClick={()=>this.renameDir()}>分班重命名</WordsBtn> }
-              { 
+              {
                   !isStudentPage && !isCourseEnd && isAdmin  && <WordsBtn style="blue" className="mr30" onClick={()=>this.addDir()}>新建分班</WordsBtn> }
 
-              { 
+              {
                   !isStudentPage && isStudent && !isParent && course_group_id != 0 && <WordsBtn style="blue" className="" onClick={()=>this.addToDir()}>加入分班</WordsBtn> }
               <style>{`
                 .drop_down_menu li a {
@@ -854,7 +854,7 @@ class studentsList extends Component{
                       ''
                     }
                     {
-                      course_group_id != 0 && course_groups && course_groups.length > 0 && 
+                      course_group_id != 0 && course_groups && course_groups.length > 0 &&
                       <li key={0} onClick={() => this.moveToGroup({id: 0})}>未分班</li>
                     }
                     { course_groups.filter((item)=> {
@@ -865,8 +865,8 @@ class studentsList extends Component{
                       )
                     }) }
                     { course_groups && course_groups.length > 0 && <Divider className="dividerStyle"></Divider> }
-                    { isAdmin && !isCourseEnd && 
-                      
+                    { isAdmin && !isCourseEnd &&
+
                       <p className="drop_down_btn">
                         <a href="javascript:void(0)" className="color-grey-6"
                             onClick={()=>this.addDir()}
@@ -876,10 +876,10 @@ class studentsList extends Component{
                     }
                   </ul>
                 </li>}
-                
+
                 {/* <li className="drop_down">
                   {currentOrderName}
-                  { course_groups && !!course_groups.length && 
+                  { course_groups && !!course_groups.length &&
                   <React.Fragment>
                   <i className="iconfont icon-xiajiantou font-12 ml2"></i>
                   <ul className="drop_down_normal" style={{width: '124px'}}>
@@ -893,7 +893,7 @@ class studentsList extends Component{
             </div>
             <Spin size="large" spinning={this.state.isSpin}>
             <div className="clearfix stu_table">
-              {students && !!students.length && <Checkbox.Group style={{ width: '100%' }} onChange={this.onCheckBoxChange} value={checkBoxValues}>       
+              {students && !!students.length && <Checkbox.Group style={{ width: '100%' }} onChange={this.onCheckBoxChange} value={checkBoxValues}>
                 <Table columns={studentlist} dataSource={students} onChange={this.onTableChange} pagination={false}></Table>
               </Checkbox.Group> }
             </div>
diff --git a/public/react/src/modules/courses/poll/PollDetailIndex.js b/public/react/src/modules/courses/poll/PollDetailIndex.js
index d064fc284..3d335e916 100644
--- a/public/react/src/modules/courses/poll/PollDetailIndex.js
+++ b/public/react/src/modules/courses/poll/PollDetailIndex.js
@@ -3,7 +3,7 @@ import {Menu} from "antd";
 
 
 import CoursesListType from '../coursesPublic/CoursesListType';
-import { WordsBtn } from 'educoder'
+import { WordsBtn,getRandomNumber } from 'educoder'
 import PollTabFirst from './PollDetailTabFirst'
 import PollTabSecond from './PollDetailTabSecond'
 import PollTabThird from './PollDetailTabThird'
@@ -112,7 +112,7 @@ class PollDetailIndex extends Component{
 
 	/// 确认是否下载
 	confirmysl(url){
-		axios.get(url + '?export=true' ).then((response) => {
+		axios.get(url + '&export=true' ).then((response) => {
 			if(response.data.status&&response.data.status===-1){
 
 			}else if(response.data.status&&response.data.status===-2){
@@ -239,7 +239,7 @@ class PollDetailIndex extends Component{
                     </li>
                     :""
                   } */}
-									<a className="fl color-blue font-16" onClick={(url)=>this.confirmysl("/polls/"+this.props.match.params.pollId+"/commit_result.xlsx")} href="javascript:void(0);">导出统计</a>
+									<a className="fl color-blue font-16" onClick={(url)=>this.confirmysl(`/polls/${this.props.match.params.pollId}/commit_result.xlsx?${getRandomNumber(true)}`)} href="javascript:void(0);">导出统计</a>
                 </span>
 							}
 							{
diff --git a/public/react/src/modules/courses/shixunHomework/Listofworksstudentone.js b/public/react/src/modules/courses/shixunHomework/Listofworksstudentone.js
index 0b760f7f9..cd905a1cf 100644
--- a/public/react/src/modules/courses/shixunHomework/Listofworksstudentone.js
+++ b/public/react/src/modules/courses/shixunHomework/Listofworksstudentone.js
@@ -1,6 +1,6 @@
 import React, {Component} from "react";
 import CoursesListType from '../coursesPublic/CoursesListType';
-import {WordsBtn, publicSearchs, sortDirections} from 'educoder';
+import {getRandomNumber, publicSearchs, sortDirections} from 'educoder';
 import {
 	Form,
 	Select,
@@ -3383,12 +3383,12 @@ class Listofworksstudentone extends Component {
 
 
 	daochushixunbaogao = () => {
-		let url = `/zip/shixun_report?homework_common_id=${this.props.match.params.homeworkid}&work_status=${this.state.course_groupyslstwo === undefined || this.state.course_groupyslstwo === null ? "" : this.state.course_groupyslstwo}&course_group=${this.state.checkedValuesineinfo === undefined || this.state.checkedValuesineinfo === null ? "" : this.state.checkedValuesineinfo}&search=${this.state.searchtext === undefined || this.state.searchtext === null ? "" : this.state.searchtext}`
+		let url = `/zip/shixun_report${getRandomNumber()}homework_common_id=${this.props.match.params.homeworkid}&work_status=${this.state.course_groupyslstwo === undefined || this.state.course_groupyslstwo === null ? "" : this.state.course_groupyslstwo}&course_group=${this.state.checkedValuesineinfo === undefined || this.state.checkedValuesineinfo === null ? "" : this.state.checkedValuesineinfo}&search=${this.state.searchtext === undefined || this.state.searchtext === null ? "" : this.state.searchtext}`
 		this.confirmysl(url);
 	}
 
 	daochuzuoye = () => {
-		let url = `/homework_commons/${this.props.match.params.homeworkid}/works_list.xlsx?course_group=${this.state.checkedValuesineinfo === undefined || this.state.checkedValuesineinfo === null ? "" : this.state.checkedValuesineinfo}&work_status=${this.state.course_groupyslstwo === undefined || this.state.course_groupyslstwo === null ? "" : this.state.course_groupyslstwo}&search=${this.state.searchtext === undefined || this.state.searchtext === null ? "" : this.state.searchtext}`
+		let url = `/homework_commons/${this.props.match.params.homeworkid}/works_list.xlsx${getRandomNumber()}course_group=${this.state.checkedValuesineinfo === undefined || this.state.checkedValuesineinfo === null ? "" : this.state.checkedValuesineinfo}&work_status=${this.state.course_groupyslstwo === undefined || this.state.course_groupyslstwo === null ? "" : this.state.course_groupyslstwo}&search=${this.state.searchtext === undefined || this.state.searchtext === null ? "" : this.state.searchtext}`
 		this.confirmysl(url);
 	}
 
diff --git a/public/react/src/modules/courses/shixunHomework/ShixunStudentWork.js b/public/react/src/modules/courses/shixunHomework/ShixunStudentWork.js
index 772d88e19..72117937c 100644
--- a/public/react/src/modules/courses/shixunHomework/ShixunStudentWork.js
+++ b/public/react/src/modules/courses/shixunHomework/ShixunStudentWork.js
@@ -1,6 +1,6 @@
 import React, {Component} from "react";
 import CoursesListType from '../coursesPublic/CoursesListType';
-import {WordsBtn, getRandomcode, sortDirections} from 'educoder';
+import {getRandomNumber, getRandomcode, sortDirections} from 'educoder';
 import ShixunWorkModal from './Shixunworkdetails/ShixunWorkModal';
 import HomeworkModal from "../coursesPublic/HomeworkModal";
 import OneSelfOrderModal from "../coursesPublic/OneSelfOrderModal";
@@ -594,12 +594,12 @@ class ShixunStudentWork extends Component {
 	}
 
 	daochuzuoye =() =>{
-		let url = `/homework_commons/${this.props.match.params.homeworkid}/works_list.xlsx`;
+		let url = `/homework_commons/${this.props.match.params.homeworkid}/works_list.xlsx${getRandomNumber()}`;
 		this.confirmysl(url);
 	}
 
 	confirmysl(url){
-		axios.get(url + '?export=true').then((response) => {
+		axios.get(url + '&export=true').then((response) => {
 			if(response === undefined){
 				return
 			}
diff --git a/public/react/src/modules/courses/shixunHomework/Trainingjobsetting.js b/public/react/src/modules/courses/shixunHomework/Trainingjobsetting.js
index 97ac1a3ea..0b4c9d7f9 100644
--- a/public/react/src/modules/courses/shixunHomework/Trainingjobsetting.js
+++ b/public/react/src/modules/courses/shixunHomework/Trainingjobsetting.js
@@ -1,7 +1,7 @@
 import React, {Component} from "react";
 import CoursesListType from '../coursesPublic/CoursesListType';
 import HomeworkModal from "../coursesPublic/HomeworkModal";
-import {WordsBtn, getRandomcode, handleDateString, getImageUrl} from 'educoder';
+import {getRandomNumber, getRandomcode, handleDateString, getImageUrl} from 'educoder';
 import PollDetailTabForthRules from '../poll/PollDetailTabForthRules';
 import ShixunWorkModal from './Shixunworkdetails/ShixunWorkModal';
 import {
@@ -2252,12 +2252,12 @@ class Trainingjobsetting extends Component {
 
 	daochushixunbaogao = () => {
 		let url = `/zip/shixun_report?homework_common_id=${this.props.match.params.homeworkid}`;
-		this.confirmysl(url, url + '&export=true');
+		this.confirmysl(url, url + `&export=true${getRandomNumber(true)}`);
 	}
 
 	daochuzuoye = () => {
 		let url = `/homework_commons/${this.props.match.params.homeworkid}/works_list.xlsx`;
-		this.confirmysl(url, url + '?export=true');
+		this.confirmysl(url, url + `?export=true&${getRandomNumber(true)}`);
 	}
 
 	confirmysl(url, urlWithExport) {
diff --git a/public/react/src/modules/courses/shixunHomework/Workquestionandanswer.js b/public/react/src/modules/courses/shixunHomework/Workquestionandanswer.js
index 4e3e692e1..c2de12750 100644
--- a/public/react/src/modules/courses/shixunHomework/Workquestionandanswer.js
+++ b/public/react/src/modules/courses/shixunHomework/Workquestionandanswer.js
@@ -1,6 +1,6 @@
 import React, {Component} from "react";
 import CoursesListType from '../coursesPublic/CoursesListType';
-import {WordsBtn, getRandomcode, markdownToHTML} from 'educoder';
+import {getRandomNumber, getRandomcode, markdownToHTML} from 'educoder';
 import {
 	Form,
 	Select,
@@ -381,12 +381,12 @@ class Workquestionandanswer extends Component {
 
 	daochushixunbaogao=()=>{
 		let url =`/zip/shixun_report?homework_common_id=${this.props.match.params.homeworkid}`;
-		this.confirmysl(url, url + '&export=true');
+		this.confirmysl(url, url + `&export=true${getRandomNumber(true)}`);
 	}
 
 	daochuzuoye =() =>{
 		let url = `/homework_commons/${this.props.match.params.homeworkid}/works_list.xlsx`;
-		this.confirmysl(url, url + '?export=true');
+		this.confirmysl(url, url + `?export=true&${getRandomNumber(true)}`);
 	}
 
 	confirmysl(url, urlWithExport){
diff --git a/public/react/src/modules/ecs/EcSetting/GraduationRequirement/index.js b/public/react/src/modules/ecs/EcSetting/GraduationRequirement/index.js
index 4ee387a73..f20e08de2 100644
--- a/public/react/src/modules/ecs/EcSetting/GraduationRequirement/index.js
+++ b/public/react/src/modules/ecs/EcSetting/GraduationRequirement/index.js
@@ -1,6 +1,7 @@
 import React from 'react';
 import PropTypes from "prop-types";
 import { Link } from 'react-router-dom';
+import {getRandomNumber} from 'educoder';
 import { Spin, Button, Input, Divider, Icon, Tooltip, Form, message, Modal } from 'antd';
 import axios from 'axios';
 import _ from 'lodash'
@@ -233,7 +234,7 @@ class GraduationRequirement extends React.Component {
                   <Link to="/forums/3530" target="_blank" className="link ml10">查看详情</Link>
                 </div>
               </div>
-              <a href={`/api/ec_years/${this.props.yearId}/ec_graduation_requirements.xlsx`} target="_blank" className="ant-btn ant-btn-primary color-white">导出毕业要求</a>
+              <a href={`/api/ec_years/${this.props.yearId}/ec_graduation_requirements.xlsx${getRandomNumber()}`} target="_blank" className="ant-btn ant-btn-primary color-white">导出毕业要求</a>
             </div>
 
             <Divider/>
diff --git a/public/react/src/modules/ecs/EcSetting/RequirementVsObjective/index.js b/public/react/src/modules/ecs/EcSetting/RequirementVsObjective/index.js
index c6542654f..f1498d2f3 100644
--- a/public/react/src/modules/ecs/EcSetting/RequirementVsObjective/index.js
+++ b/public/react/src/modules/ecs/EcSetting/RequirementVsObjective/index.js
@@ -1,7 +1,7 @@
 import React, { Component } from 'react';
 
 import classNames from 'classnames'
-
+import {getRandomNumber} from 'educoder';
 import axios from 'axios';
 
 import { Table, Divider, Tag, Checkbox, InputNumber, Spin, Icon } from 'antd';
@@ -48,7 +48,7 @@ class RequirementVsObjective extends Component {
         //   ...testState
       }
     }
-  
+
     componentDidMount(){
         // this.init()
         // return;
@@ -58,7 +58,7 @@ class RequirementVsObjective extends Component {
         axios.get(url).then((response) => {
             if (response.data.graduation_requirements) {
                 this.setState( {...response.data} , () => {
-                    this.init()     
+                    this.init()
                 })
             }
         }).catch((e) => {
@@ -92,7 +92,7 @@ class RequirementVsObjective extends Component {
         const yearId = this.props.match.params.yearId
         const url = `/ec_years/${yearId}/requirement_support_objectives.json`
         const method = select ? axios.delete : axios.post
-        method(url, 
+        method(url,
             select ? {
                 params: {
                     ec_graduation_requirement_id,
@@ -105,7 +105,7 @@ class RequirementVsObjective extends Component {
         ).then((response) => {
             if (response.data.status == 0) {
                 this.setState(
-                    (prevState) => ({ 
+                    (prevState) => ({
                         tableData : update(prevState.tableData, {[rowIndex]: {[colIndex]: {$set: select ? false : true}}})
                     })
                 )
@@ -128,7 +128,7 @@ class RequirementVsObjective extends Component {
         const columnIdIndexMap = {}
         console.log(columns, tableData)
 	    return (
-            
+
             <div className="educontent requirementVsObjective" style={{ background: '#fff' }}>
                 <ul className="clearfix padding20-30 bor-bottom-greyE backgroundFFF"
                 style={{ 'marginBottom': '0px' }} >
@@ -140,7 +140,7 @@ class RequirementVsObjective extends Component {
                     </p>
 
                     </li>
-                    <a href={`/api/ec_years/${this.props.yearId}/requirement_support_objectives.xlsx`} target="_blank" 
+                    <a href={`/api/ec_years/${this.props.yearId}/requirement_support_objectives.xlsx${getRandomNumber()}`} target="_blank"
                             className="ant-btn ant-btn-primary color-white fr mt20">导出矩阵</a>
                 </ul>
                 <div className="padding20-30" style={{ background: '#fff' }}>
@@ -155,7 +155,7 @@ class RequirementVsObjective extends Component {
                     ></SelectTable>
                 </div>
             </div>
-            
+
 	    );
   	}
 }
diff --git a/public/react/src/modules/ecs/EcSetting/RequirementVsStandard/index.js b/public/react/src/modules/ecs/EcSetting/RequirementVsStandard/index.js
index 39c3af376..f868ed250 100644
--- a/public/react/src/modules/ecs/EcSetting/RequirementVsStandard/index.js
+++ b/public/react/src/modules/ecs/EcSetting/RequirementVsStandard/index.js
@@ -1,7 +1,7 @@
 import React, { Component } from 'react';
 
 import classNames from 'classnames'
-
+import {getRandomNumber} from 'educoder'
 import axios from 'axios';
 
 import { Table, Divider, Tag, Checkbox, InputNumber, Spin, Icon } from 'antd';
@@ -12,10 +12,10 @@ class RequirementVsObjective extends Component {
     constructor(props) {
       super(props)
       this.state={
-          
+
       }
     }
-  
+
     componentDidMount(){
         // this.init()
         // return;
@@ -25,7 +25,7 @@ class RequirementVsObjective extends Component {
         axios.get(url).then((response) => {
             if (response.data.graduation_subitems) {
                 this.setState( {...response.data} , () => {
-                    this.init()     
+                    this.init()
                 })
             }
         }).catch((e) => {
@@ -61,7 +61,7 @@ class RequirementVsObjective extends Component {
         const yearId = this.props.match.params.yearId
         const url = `/ec_years/${yearId}/subitem_support_standards.json`
         const method = select ? axios.delete : axios.post
-        method(url, 
+        method(url,
             select ? {
                 params: {
                     ec_graduation_subitem_id,
@@ -74,7 +74,7 @@ class RequirementVsObjective extends Component {
         ).then((response) => {
             if (response.data.status == 0) {
                 this.setState(
-                    (prevState) => ({ 
+                    (prevState) => ({
                         tableData : update(prevState.tableData, {[rowIndex]: {[colIndex]: {$set: select ? false : true}}})
                     })
                 )
@@ -97,7 +97,7 @@ class RequirementVsObjective extends Component {
         const columnIdIndexMap = {}
         console.log(columns, tableData)
 	    return (
-            
+
             <div className="educontent requirementVsObjective" style={{ background: '#fff' }}>
                 <ul className="clearfix padding20-30 bor-bottom-greyE backgroundFFF"
                 style={{ 'marginBottom': '0px' }} >
@@ -109,7 +109,7 @@ class RequirementVsObjective extends Component {
                     </p>
 
                     </li>
-                    <a href={`/api/ec_years/${this.props.yearId}/subitem_support_standards.xlsx`} target="_blank" 
+                    <a href={`/api/ec_years/${this.props.yearId}/subitem_support_standards.xlsx${getRandomNumber()}`} target="_blank"
                             className="ant-btn ant-btn-primary color-white fr mt20">导出矩阵</a>
                 </ul>
                 <div className="padding20-30" style={{ background: '#fff' }}>
@@ -126,7 +126,7 @@ class RequirementVsObjective extends Component {
                     ></SelectTable>
                 </div>
             </div>
-            
+
 	    );
   	}
 }
diff --git a/public/react/src/modules/ecs/EcSetting/TrainingObjective/index.js b/public/react/src/modules/ecs/EcSetting/TrainingObjective/index.js
index e48cf2c84..8805e4982 100644
--- a/public/react/src/modules/ecs/EcSetting/TrainingObjective/index.js
+++ b/public/react/src/modules/ecs/EcSetting/TrainingObjective/index.js
@@ -2,6 +2,7 @@ import React from 'react';
 import PropTypes from "prop-types";
 import { Link } from 'react-router-dom';
 import { Spin, Button, Input, Divider, Icon, Tooltip, Form, message } from 'antd';
+import {getRandomNumber} from 'educoder';
 import axios from 'axios';
 
 import './index.scss';
@@ -157,7 +158,7 @@ class TrainingObjective extends React.Component {
                   <Link to="/forums/3529" target="_blank" className="link ml10">查看详情</Link>
                 </div>
               </div>
-              <a href={`/api/ec_years/${this.props.yearId}/ec_training_objectives.xlsx`} target="_blank" className="ant-btn ant-btn-primary color-white">导出培养目标</a>
+              <a href={`/api/ec_years/${this.props.yearId}/ec_training_objectives.xlsx${getRandomNumber()}`} target="_blank" className="ant-btn ant-btn-primary color-white">导出培养目标</a>
             </div>
 
             <Divider/>
@@ -191,7 +192,7 @@ class TrainingObjective extends React.Component {
                   </div>
                 )
               }
-              
+
               <div className="training-objective-items">
                 <div className="training-objective-items-head">
                   <div className="no-column">分项</div>
diff --git a/public/react/src/modules/ecs/EcSetting/reachCalculationInfo/index.js b/public/react/src/modules/ecs/EcSetting/reachCalculationInfo/index.js
index a7914f3b7..8928be3cd 100644
--- a/public/react/src/modules/ecs/EcSetting/reachCalculationInfo/index.js
+++ b/public/react/src/modules/ecs/EcSetting/reachCalculationInfo/index.js
@@ -1,6 +1,8 @@
 import React, { Component } from 'react';
 
-import classNames from 'classnames'
+import classNames from 'classnames';
+
+import {getRandomNumber} from 'educoder';
 
 import axios from 'axios';
 
@@ -166,7 +168,7 @@ const buildColumns = (that) => {
       const _i_remain = index % 3;
       // 未达成
       const obj = {
-        children: row.status ? <span style={{color: '#29BD88'}}>达成</span> 
+        children: row.status ? <span style={{color: '#29BD88'}}>达成</span>
             : <span style={{color: '#FF6800'}}>未达成</span>,
         props: {},
       };
@@ -233,14 +235,14 @@ function getTableData(data_args) {
         // 一个course数组的数据组合成三行table数据
         innerItem.course_data.forEach((course, courseIndex) => {
           nameRowData[`c${courseIndex + 1}`] = course.course_name;
-          
-          targetValueRowData[`c${courseIndex + 1}`] = course.target_value && course.target_value.toFixed 
+
+          targetValueRowData[`c${courseIndex + 1}`] = course.target_value && course.target_value.toFixed
                 ? course.target_value.toFixed(3) : course.target_value ;
           if (course.target_value) {
             target_value_total = target_value_total + course.target_value
           }
-          
-          realValueRowData[`c${courseIndex + 1}`] = course.real_value && course.real_value.toFixed 
+
+          realValueRowData[`c${courseIndex + 1}`] = course.real_value && course.real_value.toFixed
                 ? course.real_value.toFixed(3) : course.real_value ;
           if (course.real_value) {
            real_value_total = real_value_total + course.real_value
@@ -259,7 +261,7 @@ function getTableData(data_args) {
   return tableData;
 }
 // new
-function getTableData(data_args) { 
+function getTableData(data_args) {
 let tableData = []
   // 最大课程数量，根据这个值动态渲染课程列数
   maxCouseCount = 0;
@@ -274,16 +276,16 @@ let tableData = []
         // 一个course数组的数据组合成三行table数据
         innerItem.course_supports.forEach((course, courseIndex) => {
           nameRowData[`c${courseIndex + 1}`] = course.course_name;
-          
+
           targetValueRowData[`c${courseIndex + 1}`] = course.reach_criteria
-          // course.target_value && course.target_value.toFixed 
+          // course.target_value && course.target_value.toFixed
           //       ? course.target_value.toFixed(3) : course.target_value ;
           // if (course.target_value) {
           //   target_value_total = target_value_total + course.target_value
           // }
-          
+
           realValueRowData[`c${courseIndex + 1}`] = course.actually_reach
-          // course.real_value && course.real_value.toFixed 
+          // course.real_value && course.real_value.toFixed
           //       ? course.real_value.toFixed(3) : course.real_value ;
           // if (course.real_value) {
           //  real_value_total = real_value_total + course.real_value
@@ -496,7 +498,7 @@ class GraduatesRequirement extends Component {
       }
     }
     onDaChengYuZhiChange = (value) => {
-      if ( (!window.event || window.event.type == 'blur') 
+      if ( (!window.event || window.event.type == 'blur')
           && this.state.daChengYuZhi > 1 && value == 1) {
         this.props.showSingleButtonModal('提示', '达成阈值必须小于等于1')
       }
@@ -526,7 +528,7 @@ class GraduatesRequirement extends Component {
 			axios.post(url, {
 				reach_criteria : this.state.daChengYuZhi
 			}).then((response) => {
-        
+
 				if( response.data.status === 0 ) {
       		this.setState({ daChengYuZhiSaved: this.state.daChengYuZhi })
           this.setDaChengYuZhiEditableMode(false)
@@ -537,7 +539,7 @@ class GraduatesRequirement extends Component {
 				console.log(error)
 			})
 
-      
+
     }
     componentDidMount(){
       window.document.title = '达成度评价结果';
@@ -569,7 +571,7 @@ class GraduatesRequirement extends Component {
       // const url = `ec_courses/7/get_calculation_data`
       // const url = `/ec_courses/get_calculation_data?ec_year_id=${ec_year_id}`
       const url = `/ec_years/${ec_year_id}/reach_evaluation.json`
-      // num_array = getNumArray(testData.calculation_data);     
+      // num_array = getNumArray(testData.calculation_data);
       // tableData = getTableData(testData.calculation_data)
       // return
 
@@ -578,8 +580,8 @@ class GraduatesRequirement extends Component {
           })
         .then((response) => {
           if (response.data.graduation_requirements) {
-            num_array = getNumArray(response.data.graduation_requirements);     
-            tableData = getTableData(response.data.graduation_requirements) 
+            num_array = getNumArray(response.data.graduation_requirements);
+            tableData = getTableData(response.data.graduation_requirements)
             // 先计算，再触发render
             this.setState({
               calculationData: response.data.calculation_data,
@@ -590,7 +592,7 @@ class GraduatesRequirement extends Component {
               calculating: false,
             })
           }
-          
+
 
         })
         .catch(function (error) {
@@ -604,7 +606,7 @@ class GraduatesRequirement extends Component {
 
         return;
       }
-      
+
       this.setState({ calculating: true })
       var Url = '/ec_courses/sync_all_course_data';
       /**
@@ -615,14 +617,14 @@ class GraduatesRequirement extends Component {
 			axios.post(Url, {
         course_ids: this.state.course_ids
 			}).then((response) => {
-        // 计算需要一定的时间，让按钮转动            
-        
+        // 计算需要一定的时间，让按钮转动
+
 				if( response.data.status === 1 ) {
           let ec_year_id = this.props.match.params.ec_year_id;
           this.fetchData(ec_year_id);
           this.props.showSingleButtonModal('提示', '计算完毕')
 				} else {
-        
+
 				}
 			}).catch((error) => {
         this.setState({ calculating: false })
@@ -641,7 +643,7 @@ class GraduatesRequirement extends Component {
       //   showCalculateButton = true;
       // }
 	    return (
-            
+
             <div className="educontent graduatesRequirement">
 
               <ul className="clearfix padding20-30 bor-bottom-greyE backgroundFFF"
@@ -659,62 +661,62 @@ class GraduatesRequirement extends Component {
               <p class="clearfix padding20-30 bor-bottom-greyE backgroundFFF"
                 style={{ 'paddingBottom': '12px' }}>
                 <span class="fl font-14">达成阈值：</span>
-                { daChengYuZhiEditableMode ? 
+                { daChengYuZhiEditableMode ?
                     <React.Fragment>
                       <InputNumber value={daChengYuZhi} onChange={this.onDaChengYuZhiChange}
                         size="small" min={0} max={1} step={0.01} ></InputNumber>
-                      <span onClick={this.saveDaChengYuZhi} 
+                      <span onClick={this.saveDaChengYuZhi}
                         style={{color: '#4CACFF', marginLeft: '4px', cursor: 'pointer', fontSize: '13px'}}>确定
                       </span>
                       <span onClick={ this.onDaChengYuZhiCancel }
                         style={{color: '#d1d1d1', marginLeft: '4px', cursor: 'pointer', fontSize: '13px'}} >取消
                       </span>
                     </React.Fragment>
-                  : 
+                  :
                     <React.Fragment>
                       <span class="color-orange fl" id="ReachStandardNum">{daChengYuZhiSaved}</span>
                       {/* data-tip-down="编辑"  */}
-                      <i 
+                      <i
                         onClick={() => { this.setDaChengYuZhiEditableMode(true) }}
                         class="iconfont icon-bianjidaibeijing color-green" idkey="0"
                         style={{ float: 'left', marginTop: '-3px', marginLeft: '3px', cursor: 'pointer' }}></i>
                     </React.Fragment>
                 }
-                
+
                 {/* <a class="mr20 editSubentry"  style={{display: 'block'}}>
-                  
+
                 </a> */}
 
-                <a href="javascript:void(0)" 
-                  class="white-btn edu-orangeback-btn fr mr10" 
-                  href={`/api/ec_years/${this.state.ec_year_id}/reach_evaluation.xlsx`}
+                <a href="javascript:void(0)"
+                  class="white-btn edu-orangeback-btn fr mr10"
+                  href={`/api/ec_years/${this.state.ec_year_id}/reach_evaluation.xlsx${getRandomNumber()}`}
                 >导出</a>
                 {/* /ec_major_schools/3/academic_years/5/export_reach_requirements_data.xls
                   let major_school_id =this.props.match.params.major_school_id;
                   let ec_year_id =this.props.match.params.ec_year_id;
                   */}
-                
-                { showCalculateButton && ( this.state.calculating === true ? 
+
+                { showCalculateButton && ( this.state.calculating === true ?
                   <a href="javascript:void(0)" class="white-btn edu-grayback-btn mr20 fr">
                     计算中...
-                  </a> : 
+                  </a> :
                   <a href="javascript:void(0)" class="white-btn edu-orangeline-btn mr20 fr" onClick={this.onCalculate}>
                     计算
                 </a> )
                 }
-                
+
               </p>
-              
-              {/* { this.state.calculating == true ? 
+
+              {/* { this.state.calculating == true ?
               <Spin delay={500} className="Spinlarge" indicator={<Icon type="loading" style={{ fontSize: 30 }} spin />}></Spin>
               :  }       　 */}
               <Table bordered loading={ this.state.calculating }
                 columns={buildColumns(this)} dataSource={tableData} pagination={false}
-                scroll={{ y: 530 }}  
+                scroll={{ y: 530 }}
               ></Table>
-              
+
             </div>
-            
+
 	    );
   	}
 }
diff --git a/public/react/src/modules/ecs/curriculum/Curriculum.js b/public/react/src/modules/ecs/curriculum/Curriculum.js
index 889004d8d..7d7504074 100644
--- a/public/react/src/modules/ecs/curriculum/Curriculum.js
+++ b/public/react/src/modules/ecs/curriculum/Curriculum.js
@@ -1,23 +1,13 @@
 import React, { Component } from 'react';
-import classNames from 'classnames'
 
-import axios from 'axios';
-
-import { TPMIndexHOC } from '../../tpm/TPMIndexHOC';
-
-import { SnackbarHOC } from 'educoder'
-
-import { message,Modal,Spin,Icon} from 'antd';
+import {getRandomNumber} from 'educoder';
 
 import 'antd/dist/antd.css';
 
-import EcTitleCourseEvaluations from '../ecTitle/ecTitle'
-
 import '../css/ecCourseSupports.css';
 
 import '../css/ecCourseEvaluations.css';
 import {
-	BrowserRouter as Router,
 	Route,
 	Switch
 } from 'react-router-dom';
@@ -223,7 +213,7 @@ class Curriculum extends Component {
 							titine===5?
 						  <span>
 						  <span className={ismanager===false?"none":""} style={{top: "26px"}}>
-							<a className="white-btn edu-blueback-btn fr mb10 mr10 mt9" target="_blank" href={`/ec_courses/${ec_course_id}/course_targets.xlsx`}>导出评价详情</a>
+							<a className="white-btn edu-blueback-btn fr mb10 mr10 mt9" target="_blank" href={`/ec_courses/${ec_course_id}/course_targets.xlsx${getRandomNumber()}`}>导出评价详情</a>
 							</span>
 						  <span className={ismanager===false?"none":"right newrightcalculatebuttons fr mb10 mr20 "}
 							onClick={()=>this.newrightcalculatebuttonysl(this.child)}>计算</span>