+
+
查询图书是否逾期
+
-
\ No newline at end of file
+
diff --git a/WebContent/manager/04judgeSus.jsp b/WebContent/manager/04judgeSus.jsp
index ea9a38c..bb70b82 100644
--- a/WebContent/manager/04judgeSus.jsp
+++ b/WebContent/manager/04judgeSus.jsp
@@ -1,80 +1,79 @@
-<%@ page import="javabean.DateTime" %>
-<%@ page import="javabean.CompareDate" %>
-<%@ page import="java.sql.*" %>
+<%@ page import="javabean.DateTime" %> // 导入自定义的DateTime类，用于获取当前日期时间
+<%@ page import="javabean.CompareDate" %> // 导入自定义的CompareDate类，用于比较日期
+<%@ page import="java.sql.*" %> // 导入Java SQL包，用于数据库操作
<%@ page language="java" contentType="text/html; charset=UTF-8"
- pageEncoding="UTF-8"%>
+ pageEncoding="UTF-8"%> // 设置页面语言为Java，内容类型和字符编码为UTF-8
-
-
Insert title here
+
+
Insert title here
-
+
// 使用JSP标签声明一个名为judge的会话范围的JavaBean对象，类为javabean.JDBCBean
<%
- String book = request.getParameter("bookid");
- session.setAttribute("book", book);
- if(session.getAttribute("manager")!=null){
- DateTime date = new DateTime();
- String now = date.show();
- String bookid = request.getParameter("bookid");
-
- String sql="select*from borrow_books where book_id = "+bookid;
- ResultSet rs = judge.executeQuery(sql);
- String end = "";
- String ret = "";
- String card = "";
- while (rs.next()) {
- end = rs.getString("end_date");
- ret = rs.getString("return_date");
- card = rs.getString("card_id");
- }
- if(ret==null){
- //CompareDate cd = new CompareDate();
- long n = CompareDate.show(now,end);
- //out.println(sql);
- //out.println(n);
- //out.println(end);
- //out.println(now);
- session.setAttribute("days", n);
-
- String sql1="select*from borrow_card where id = "+card;
- ResultSet rs1 = judge.executeQuery(sql1);
- String rule = "";
- while (rs1.next()) {
- rule = rs1.getString("rule_id");
- }
-
- String sql2="select*from rules where id = "+rule;
- ResultSet rs2 = judge.executeQuery(sql2);
- String fee = "";
- while (rs2.next()) {
- fee = rs2.getString("overtime_fee");
- }
- session.setAttribute("fee", fee);
- %>
-
- <%
- }else{
- %>
-
- <%
+ String book = request.getParameter("bookid"); // 从请求中获取参数bookid的值
+ session.setAttribute("book", book); // 将bookid的值存储到会话属性中
+ if(session.getAttribute("manager")!=null){ // 检查会话中是否存在manager属性，判断用户是否已登录
+ DateTime date = new DateTime(); // 创建DateTime对象实例
+ String now = date.show(); // 调用DateTime对象的show方法获取当前日期时间字符串
+ String bookid = request.getParameter("bookid"); // 再次从请求中获取参数bookid的值
+
+ String sql="select*from borrow_books where book_id = "+bookid; // 构建SQL查询语句，查询借书记录表
+ ResultSet rs = judge.executeQuery(sql); // 执行SQL查询，返回结果集
+ String end = ""; // 初始化变量end，用于存储借书记录中的归还日期
+ String ret = ""; // 初始化变量ret，用于存储借书记录中的归还日期
+ String card = ""; // 初始化变量card，用于存储借书记录中的借书卡ID
+ while (rs.next()) { // 遍历结果集
+ end = rs.getString("end_date"); // 获取归还日期
+ ret = rs.getString("return_date"); // 获取实际归还日期
+ card = rs.getString("card_id"); // 获取借书卡ID
}
- }else{
- %>
-
- <%
+ if(ret==null){ // 如果实际归还日期为空，表示书未归还
+ //CompareDate cd = new CompareDate();
+ long n = CompareDate.show(now,end); // 计算当前日期与归还日期之间的天数差
+ //out.println(sql);
+ //out.println(n);
+ //out.println(end);
+ //out.println(now);
+ session.setAttribute("days", n); // 将天数差存储到会话属性中
+
+ String sql1="select*from borrow_card where id = "+card; // 构建SQL查询语句，查询借书卡信息
+ ResultSet rs1 = judge.executeQuery(sql1); // 执行SQL查询，返回结果集
+ String rule = ""; // 初始化变量rule，用于存储规则ID
+ while (rs1.next()) { // 遍历结果集
+ rule = rs1.getString("rule_id"); // 获取规则ID
+ }
+
+ String sql2="select*from rules where id = "+rule; // 构建SQL查询语句，查询规则信息
+ ResultSet rs2 = judge.executeQuery(sql2); // 执行SQL查询，返回结果集
+ String fee = ""; // 初始化变量fee，用于存储超时费用
+ while (rs2.next()) { // 遍历结果集
+ fee = rs2.getString("overtime_fee"); // 获取超时费用
+ }
+ session.setAttribute("fee", fee); // 将超时费用存储到会话属性中
+%>
+
+window.location.href = "04return.jsp"; // 跳转到04return.jsp页面
+
+<%
+}else{ // 如果实际归还日期不为空，表示书已归还或不存在
+%>
+
+("该书未借出或不存在！");
+window.location.href = "04judge.jsp"; // 跳转到04judge.jsp页面
+
+<%
}
+}else{ // 如果会话中不存在manager属性，表示用户未登录
+%>
+
+('请先登录！');
+window.parent.location.href = "../loginManager.html"; // 跳转到登录页面
+<%
+ }
%>
-
\ No newline at end of file
+
+
+