third commit

src/main/java/com/ai/SimpleSpringbootProjectApplication.java

 package com.ai;
 
 import org.apache.ibatis.annotations.Mapper;
+import org.mybatis.spring.annotation.MapperScan;
 import org.springframework.boot.SpringApplication;
 import org.springframework.boot.autoconfigure.SpringBootApplication;
 

src/main/java/com/ai/controller/UserController.java

@@ -3,6 +3,7 @@ package com.ai.controller;
 import com.ai.service.UserService;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.web.bind.annotation.CrossOrigin;
+import org.springframework.web.bind.annotation.GetMapping;
 import org.springframework.web.bind.annotation.RequestMapping;
 import org.springframework.web.bind.annotation.RestController;
 
@@ -15,7 +16,7 @@ public class UserController {
     private UserService userService;
 
     // http://localhost:8081/user/findAllUser
-    @RequestMapping("/findAllUser")
+    @GetMapping("/findAllUser")
     public String findAllUser() {
         return userService.findAllUser().toString();
     }

src/main/java/com/ai/service/impl/UserServiceImpl.java

@@ -5,7 +5,6 @@ import com.ai.pojo.User;
 import com.ai.service.UserService;
 import com.ai.util.MyBatisUtils;
 import org.apache.ibatis.session.SqlSession;
-import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.stereotype.Service;
 
 import java.util.List;

src/main/resources/com.ai/mapper/UserMapper.xml → src/main/resources/mapper/UserMapper.xml

@@ -5,7 +5,8 @@
 <mapper namespace="com.ai.mapper.UserMapper">
 
     <select id="findAllUser" resultType="com.ai.pojo.User">
-        select * from user;
+        select *
+        from user;
     </select>
 
 </mapper>

src/main/resources/mybatis-config.xml

@@ -21,7 +21,7 @@
     </environments>
 
     <mappers>
-        <package name="com.ai.mapper"/>
+        <mapper resource="mapper/UserMapper.xml"/>
     </mappers>
 
 </configuration>