origin

src/main/java/com/example/DemoApplication.java

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+package com.example;
+
+import org.mybatis.spring.annotation.MapperScan;
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+
+@MapperScan("com.example.mapper") //扫描的mapper
+@SpringBootApplication
+public class DemoApplication {
+
+    public static void main(String[] args) {
+        SpringApplication.run(DemoApplication.class, args);
+    }
+}

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

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+package com.example.controller;
+
+import com.example.entity.User;
+import com.example.service.UserService;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
+import org.springframework.web.bind.annotation.PathVariable;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+/**
+ * @Author:wjup
+ * @Date: 2018/9/26 0026
+ * @Time: 14:42
+ */
+
+@RestController
+@RequestMapping("/testBoot")
+public class UserController {
+
+    @Autowired
+    private UserService userService;
+
+    @RequestMapping("getUser/{id}")
+    public String GetUser(@PathVariable int id){
+        return userService.Sel(id).toString();
+    }
+}

src/main/java/com/example/entity/User.java

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+package com.example.entity;
+
+/**
+ * @Author:wjup
+ * @Date: 2018/9/26 0026
+ * @Time: 14:39
+ */
+public class User {
+    private Integer id;
+    private String userName;
+    private String passWord;
+    private String realName;
+
+    public Integer getId() {
+        return id;
+    }
+
+    public void setId(Integer id) {
+        this.id = id;
+    }
+
+    public String getUserName() {
+        return userName;
+    }
+
+    public void setUserName(String userName) {
+        this.userName = userName;
+    }
+
+    public String getPassWord() {
+        return passWord;
+    }
+
+    public void setPassWord(String passWord) {
+        this.passWord = passWord;
+    }
+
+    public String getRealName() {
+        return realName;
+    }
+
+    public void setRealName(String realName) {
+        this.realName = realName;
+    }
+
+    @Override
+    public String toString() {
+        return "User{" +
+                "id=" + id +
+                ", userName='" + userName + '\'' +
+                ", passWord='" + passWord + '\'' +
+                ", realName='" + realName + '\'' +
+                '}';
+    }
+}

src/main/java/com/example/mapper/UserMapper.java

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+package com.example.mapper;
+
+import com.example.entity.User;
+import org.apache.ibatis.annotations.Select;
+import org.springframework.stereotype.Repository;
+
+/**
+ * @Author:wjup
+ * @Date: 2018/9/26 0026
+ * @Time: 15:20
+ */
+@Repository
+public interface UserMapper {
+
+    User Sel(int id);
+}

src/main/java/com/example/service/UserService.java

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+package com.example.service;
+
+import com.example.entity.User;
+import com.example.mapper.UserMapper;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Service;
+
+/**
+ * @Author:wjup
+ * @Date: 2018/9/26 0026
+ * @Time: 15:23
+ */
+@Service
+public class UserService {
+    @Autowired
+    UserMapper userMapper;
+    public User Sel(int id){
+        return userMapper.Sel(id);
+    }
+}

src/main/resources/application-dev.yml

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+server:
+  port: 8080
+
+spring:
+  datasource:
+    username: sgk
+    password: 070915
+    url: jdbc:mysql://127.0.0.1:3306/user?useUnicode=true&characterEncoding=utf-8&useSSL=true&serverTimezone=UTC
+    driver-class-name: com.mysql.jdbc.Driver
+
+mybatis:
+  mapper-locations: classpath:mapping/*Mapping.xml
+  type-aliases-package: com.example.entity
+
+#showSql
+logging:
+  level:
+    com:
+      example:
+        mapper : debug

src/main/resources/application.yml

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+spring:
+  profiles:
+    active: dev

src/main/resources/mapping/UserMapping.xml

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+<?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.example.mapper.UserMapper">
+
+    <resultMap id="BaseResultMap" type="com.example.entity.User">
+        <result column="id" jdbcType="INTEGER" property="id" />
+        <result column="userName" jdbcType="VARCHAR" property="userName" />
+        <result column="passWord" jdbcType="VARCHAR" property="passWord" />
+        <result column="realName" jdbcType="VARCHAR" property="realName" />
+    </resultMap>
+
+    <select id="Sel" resultType="com.example.entity.User">
+        select * from user where id = #{id}
+    </select>
+
+</mapper>

src/test/java/com/example/demo/DemoApplicationTests.java

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+package com.example.demo;
+
+import org.junit.jupiter.api.Test;
+import org.springframework.boot.test.context.SpringBootTest;
+
+@SpringBootTest
+class DemoApplicationTests {
+
+    @Test
+    void contextLoads() {
+    }
+
+}