diff --git a/.gitignore b/.gitignore
index ce4b72605887be32510101a99e78836512888c78..90e15af88b04a4333d4b95af010656830565ff4f 100644
--- a/.gitignore
+++ b/.gitignore
@@ -5,7 +5,6 @@ target
 # Log file
 *.log
 
-
 # BlueJ files
 *.ctxt
 
diff --git a/src/main/java/com/snhanyue/course/mapper/database/UsersMapper.java b/src/main/java/com/snhanyue/course/mapper/database/UsersMapper.java
index 2702d50233a4f95a6057cc013bb3c6d1b5078e5e..5997afa0a816c4947ff56b5a189f393ec748526b 100644
--- a/src/main/java/com/snhanyue/course/mapper/database/UsersMapper.java
+++ b/src/main/java/com/snhanyue/course/mapper/database/UsersMapper.java
@@ -2,6 +2,7 @@ package com.snhanyue.course.mapper.database;
 
 import com.snhanyue.course.entity.Users;
 import com.snhanyue.course.vo.UsersVo;
+import org.apache.ibatis.annotations.Param;
 import org.springframework.stereotype.Repository;
 
 
@@ -18,8 +19,24 @@ public interface UsersMapper {
      */
     int insert(Users users);
 
-    //查询方法
+    /**
+     * 查询数据
+     * @param username用户名
+     * @return 查询的数据
+     */
     UsersVo getByName(String username);
 
+    /**
+     *
+     * @param  id 主键编号
+     * @return 受影响行数
+     */
+    int Update(@Param("id") int id, @Param("username")String username);
 
+    /**
+     * 删除数据
+     * @param id 主键id
+     * @return受影响行数
+     */
+    int deleteUsers(int id);
 }
diff --git a/src/main/resources/mybatis/mapper/UsersMapper.xml b/src/main/resources/mybatis/mapper/UsersMapper.xml
index 4f65982087aa31437159752fda406c39d84fa01e..a51553254208814306265742c63c1ed6bc46fa66 100644
--- a/src/main/resources/mybatis/mapper/UsersMapper.xml
+++ b/src/main/resources/mybatis/mapper/UsersMapper.xml
@@ -13,6 +13,17 @@
         )
     </insert>
 
+    <delete id="deleteUsers">
+        delete from users where id=#{id}
+    </delete>
+
+    <update id="Update">
+        update users
+        set username=#{username}
+        where id = #{id}
+    </update>
+
+
     <!-- CategorySimpleVO getByName(String name); -->
     <select id="getByName" resultMap="SimpleResultMap">
     select * from users where username=#{name}
@@ -24,7 +35,6 @@
         <id column="age" property="age" />
         <id column="phone" property="phone" />
         <id column="address_id" property="address_id" />
-
     </resultMap>
 
 
diff --git a/src/test/java/com/snhanyue/mapper/UserMapperTests.java b/src/test/java/com/snhanyue/mapper/UserMapperTests.java
index e58aa14a42c26b1bde2c82451a5d1dff174dff88..3519eb0c7fd9d4a43db95c5ab32c5a69052d430e 100644
--- a/src/test/java/com/snhanyue/mapper/UserMapperTests.java
+++ b/src/test/java/com/snhanyue/mapper/UserMapperTests.java
@@ -16,6 +16,9 @@ public class UserMapperTests {
     @Autowired
     UsersMapper mapper;
 
+    /**
+     * 插入users表测试
+     */
     @Test
     public void TestInsert(){
         Users users = new Users();
@@ -31,11 +34,38 @@ public class UserMapperTests {
 
     }
 
+    /**
+     * 查询users测试
+     */
     @Test
-    public void testGetByNameSuccessfully(){
+    public void testGetByName(){
         String name="陈鹏";
         UsersVo usersVo = mapper.getByName(name);
         System.out.println(usersVo.toString());
     }
 
+    /**
+     * 更改users表测试
+     */
+
+    @Test
+    public void testUpdate(){
+        int id=2;
+        String name="张三";
+        int row =mapper.Update(id,name);
+        System.out.println(row);
+    }
+
+
+    /**
+     * 删除user表数据测试
+     */
+
+    @Test
+    public void testDelete(){
+        int id =2;
+        int row = mapper.deleteUsers(id);
+        System.out.println(row);
+    }
+
 }