diff --git a/src/cn/edu/hactcm/dao/StudentDao.xml b/src/cn/edu/hactcm/dao/StudentDao.xml
deleted file mode 100644
index 10997e3..0000000
--- a/src/cn/edu/hactcm/dao/StudentDao.xml
+++ /dev/null
@@ -1,94 +0,0 @@
-<?xml version="1.0" encoding="UTF-8" ?>
-<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" 
-    "http://mybatis.org/dtd/mybatis-3-mapper.dtd" >
-<mapper namespace="com.itheima.dao.StudentDao" >
-
-    <!--分页查询-->
-    <select id="getStudentList" parameterType="Student" resultType="Student">
-        select *from d_student
-        <where>
-            <if test="s_name!=null and s_name!='' ">
-                and  s_name like  '%${s_name}%'
-            </if>
-            <if test="s_studentid!=null and s_studentid!=0">
-                and  s_studentid like  '%${s_studentid}%'
-            </if>
-            <if test="s_classid!=null and s_classid!=0">
-                and  s_classid like  '%${s_classid}%'
-            </if>
-            <if test="s_classname!=null and s_classname!='' ">
-                and  s_classname like  '%${s_classname}%'
-            </if>
-        </where>
-        ORDER BY  s_id asc
-        limit #{currentPage},#{pageSize}
-    </select>
-    <!--查询数据总数-->
-    <select id="totalCount"  resultType="Integer">
-        select count(s_studentid) from d_student
-        <where>
-              <if test="s_name!=null and s_name!='' ">
-                 and  s_name like  '%${s_name}%'
-               </if>
-              <if test="s_studentid!=null and s_studentid!=0">
-                  and  s_studentid like  '%${s_studentid}%'
-               </if>
-              <if test="s_classid!=null and s_classid!=0">
-                  and  s_classid like  '%${s_classid}%'
-              </if>
-              <if test="s_classname!=null and s_classname!='' ">
-                and  s_classname like  '%${s_classname}%'
-              </if>
-          </where>
-    </select>
-    <!--通过id删除学生信息-->
-    <delete id="deleteStudent" parameterType="Integer" >
-        delete from d_student where s_id=#{s_id}
-    </delete>
-    <!--添加学生信息-->
-    <insert id="addStudent" parameterType="Student" keyProperty="s_id" useGeneratedKeys="true">
-        insert into d_student (s_studentid,s_name,s_sex,s_age,s_phone,s_classid,s_classname,s_dormitoryid)
-        values(#{s_studentid},#{s_name},#{s_sex},#{s_age},#{s_phone},#{s_classid},#{s_classname},#{s_dormitoryid})
-    </insert>
-
-
-    <select id="findStudentById"  parameterType="Integer" resultType="Student" >
-       select * from d_student where s_id=#{s_id}
-    </select>
-    <!--修改学生信息-->
-    <update id="updateStudent" parameterType="Student">
-        update d_student
-        <set>
-            <if test="s_studentid!=null and s_studentid!=0">
-                s_studentid=#{s_studentid},
-            </if>
-            <if test="s_name !=null and s_name !=''">
-                s_name=#{s_name},
-            </if>
-            <if test="s_sex !=null and s_sex !=''">
-                s_sex=#{s_sex},
-            </if>
-            <if test="s_age !=null and s_age !=0">
-                s_age=#{s_age},
-            </if>
-            <if test="s_phone !=null and s_phone !=0">
-                s_phone=#{s_phone},
-            </if>
-            <if test="s_classid!=null and s_classid!=0">
-                s_classid=#{s_classid},
-            </if>
-            <if test="s_classname !=null and s_classname !=''">
-                s_classname=#{s_classname},
-            </if>
-            <if test="s_dormitoryid!=null and s_dormitoryid!=0">
-                s_dormitoryid=#{s_dormitoryid},
-            </if>
-        </set>
-        where s_id = #{s_id}
-    </update>
-
-    <select id="getAll" resultType="Student">
-        select * from d_student;
-    </select>
-
-</mapper>