diff --git a/pom.xml b/pom.xml
index 59bd85f..42dc25d 100644
--- a/pom.xml
+++ b/pom.xml
@@ -72,6 +72,13 @@
             <scope>test</scope>
         </dependency>
 
+        <!-- knife4j -->
+        <dependency>
+            <groupId>com.github.xiaoymin</groupId>
+            <artifactId>knife4j-openapi3-jakarta-spring-boot-starter</artifactId>
+            <version>4.4.0</version>
+        </dependency>
+
 
     </dependencies>
 
diff --git a/src/main/java/com/example/practice/controller/UserController.java b/src/main/java/com/example/practice/controller/UserController.java
deleted file mode 100644
index 95e34d6..0000000
--- a/src/main/java/com/example/practice/controller/UserController.java
+++ /dev/null
@@ -1,30 +0,0 @@
-package com.example.practice.controller;
-
-import com.example.practice.entity.User;
-import com.example.practice.mapper.UserMapper;
-import com.example.practice.mapper.UserMapperImpl;
-import org.springframework.stereotype.Controller;
-import org.springframework.web.bind.annotation.GetMapping;
-import org.springframework.web.bind.annotation.RequestMapping;
-import org.springframework.web.bind.annotation.ResponseBody;
-import org.springframework.web.bind.annotation.RestController;
-
-import java.util.List;
-
-//@Controller         // UserController userController = new UserController(); userController对象放到SpringIOC容器中
-//@ResponseBody       // 把返回值打印到浏览器上
-
-@RestController     // @Controller + @ResponseBody
-@RequestMapping("/user")
-public class UserController {
-
-    private UserMapper userMapper = new UserMapperImpl();
-
-    @GetMapping("/selectAll")
-    public List<User> queryAll() {
-        List<User> users = userMapper.selectAll();
-        return users;
-    }
-
-
-}
diff --git a/src/main/java/com/example/practice/mapper/UserMapper.java b/src/main/java/com/example/practice/mapper/UserMapper.java
index faf8eb5..9b38507 100644
--- a/src/main/java/com/example/practice/mapper/UserMapper.java
+++ b/src/main/java/com/example/practice/mapper/UserMapper.java
@@ -1,9 +1,11 @@
 package com.example.practice.mapper;
 
 import com.example.practice.entity.User;
+import org.apache.ibatis.annotations.Mapper;
 
 import java.util.List;
 
+@Mapper // 将UserMapper的接口实现类对象生成，放入SpringIOC容器 UserMapperImpl userMapperImpl = new UserMapperImpl()
 public interface UserMapper {
 
     List<User> selectAll();
diff --git a/src/main/resources/application.yml b/src/main/resources/application.yml
deleted file mode 100644
index 3d65a99..0000000
--- a/src/main/resources/application.yml
+++ /dev/null
@@ -1,6 +0,0 @@
-spring:
-  datasource:
-    driver-class-name: com.mysql.cj.jdbc.Driver
-    url: jdbc:mysql://localhost:3306/practice
-    username: root
-    password: 123456
\ No newline at end of file
diff --git a/src/main/resources/mybatis-config.xml b/src/main/resources/mybatis-config.xml
index 87c972d..9be28de 100644
--- a/src/main/resources/mybatis-config.xml
+++ b/src/main/resources/mybatis-config.xml
@@ -1,28 +1,28 @@
-<!--<?xml version="1.0" encoding="UTF-8" ?>-->
-<!--<!DOCTYPE configuration-->
-<!--        PUBLIC "-//mybatis.org//DTD Config 3.0//EN"-->
-<!--        "http://mybatis.org/dtd/mybatis-3-config.dtd">-->
+<?xml version="1.0" encoding="UTF-8" ?>
+<!DOCTYPE configuration
+        PUBLIC "-//mybatis.org//DTD Config 3.0//EN"
+        "http://mybatis.org/dtd/mybatis-3-config.dtd">
 
-<!--<configuration>-->
+<configuration>
 
-<!--    <environments default="dev">-->
+    <environments default="dev">
 
-<!--        <environment id="dev">-->
-<!--            <transactionManager type="JDBC"/>-->
-<!--            <dataSource type="POOLED">-->
-<!--                <property name="driver" value="com.mysql.cj.jdbc.Driver"/>-->
-<!--                <property name="url" value="jdbc:mysql://localhost:3306/practice"/>-->
-<!--                <property name="username" value="root"/>-->
-<!--                <property name="password" value="123456"/>-->
-<!--            </dataSource>-->
-<!--        </environment>-->
+        <environment id="dev">
+            <transactionManager type="JDBC"/>
+            <dataSource type="POOLED">
+                <property name="driver" value="com.mysql.cj.jdbc.Driver"/>
+                <property name="url" value="jdbc:mysql://localhost:3306/practice"/>
+                <property name="username" value="root"/>
+                <property name="password" value="123456"/>
+            </dataSource>
+        </environment>
 
-<!--    </environments>-->
+    </environments>
 
-<!--    <mappers>-->
-<!--        <mapper resource="mapper/UserMapper.xml"/>-->
-<!--    </mappers>-->
+    <mappers>
+        <mapper resource="mapper/UserMapper.xml"/>
+    </mappers>
 
-<!--</configuration>-->
+</configuration>