mybatis

README.md

@@ -1,2 +1,11 @@
 # the_second_work
 
+在本地配置mysql环境并创建userservice数据库,在application.yml配置文件中设置数据库账号密码,根据下面sql语句建表:
+```sql
+CREATE TABLE user (
+    id BIGINT NOT NULL AUTO_INCREMENT PRIMARY KEY,
+    name VARCHAR(255) NOT NULL,
+    age INT NOT NULL
+);
+```
+

demo/pom.xml

@@ -51,6 +51,16 @@
             <artifactId>springdoc-openapi-starter-webmvc-ui</artifactId>
             <version>2.1.0</version>
         </dependency>
+        <dependency>
+            <groupId>org.mybatis.spring.boot</groupId>
+            <artifactId>mybatis-spring-boot-starter</artifactId>
+            <version>3.0.4</version>
+        </dependency>
+        <dependency>
+            <groupId>com.mysql</groupId>
+            <artifactId>mysql-connector-j</artifactId>
+            <scope>runtime</scope>
+        </dependency>
 
 
     </dependencies>

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

@@ -1,4 +1,4 @@
-package com.example.demo;
+package com.example;
 
 import org.springframework.boot.SpringApplication;
 import org.springframework.boot.autoconfigure.SpringBootApplication;

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

@@ -1,25 +1,32 @@
-package com.example.demo.controller;
+package com.example.controller;
 
-import com.example.demo.entity.User;
+import com.example.entity.User;
+import com.example.service.UserService;
 import io.swagger.v3.oas.annotations.Operation;
 import io.swagger.v3.oas.annotations.Parameter;
 import io.swagger.v3.oas.annotations.parameters.RequestBody;
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.transaction.annotation.Transactional;
+import org.springframework.transaction.reactive.TransactionalOperator;
 import org.springframework.web.bind.annotation.*;
 
 import java.util.*;
 
 @RestController
 @RequestMapping("/users")
+@Slf4j
 public class UserController {
 
-    static Map<Long, User> users = Collections.synchronizedMap(new HashMap<>());
+    @Autowired
+    private UserService userService;
 
 
     @GetMapping("/")
     @Operation(summary = "获取用户列表")
     public List<User> getUserList(){
-        List<User> userList = new ArrayList<>(users.values());
-        return userList;
+        log.info("获取用户列表");
+        return userService.list();
     }
 
 
@@ -27,32 +34,37 @@ public class UserController {
     @Operation(summary = "创建用户",description = "根据user对象创建用户")
     public String postUser(@io.swagger.v3.oas.annotations.parameters.RequestBody(description = "用户实体类")
                                @org.springframework.web.bind.annotation.RequestBody User user) {
-        users.put(user.getId(), user);
+        log.info("创建用户:{}",user);
+        userService.save(user);
         return "success";
     }
 
     @Operation(summary = "获取用户详细信息",description = "根据url的id来获取用户详细信息")
     @GetMapping("/{id}")
     public User getUser(@Parameter(description ="用户id" )@PathVariable Long id) {
-        return users.get(id);
+        log.info("根据id获取用户,id={}",id);
+        return userService.selectById(id);
     }
 
 
     @PutMapping("/{id}")
     @Operation(summary = "更新用户详细信息",description = "根据url的id指定更新对象,并根据传过来的user信息更新用户详细信息")
+    @Transactional
     public String putUser(@Parameter(description = "用户ID")@PathVariable Long id,@RequestBody(description = "用户实体类")
     @org.springframework.web.bind.annotation.RequestBody User user){
-        User u = users.get(id);
+        log.info("更新用户,id={}",user.getId());
+        User u = userService.selectById(id);
         u.setName(user.getName());
         u.setAge(user.getAge());
-        users.put(id, u);
+        userService.update(u);
         return "success";
     }
 
     @DeleteMapping("/{id}")
     @Operation(summary = "删除用户",description = "根据url的id来指定删除对象")
     public String deleteUser(@Parameter(description = "用户ID")@PathVariable Long id) {
-        users.remove(id);
+        log.info("产出用户,id={}",id);
+        userService.remove(id);
         return "success";
     }
 }

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

@@ -1,4 +1,4 @@
-package com.example.demo.entity;
+package com.example.entity;
 
 import io.swagger.v3.oas.annotations.media.Schema;
 import lombok.Data;

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

@@ -0,0 +1,21 @@
+package com.example.mapper;
+
+import com.example.entity.User;
+import org.apache.ibatis.annotations.Mapper;
+
+import java.util.List;
+
+@Mapper
+public interface UserMapper {
+
+    List<User>list();
+
+    void save(User user);
+
+    User selectById(Long id);
+
+    void update(User user);
+
+    void deleteById(Long id);
+
+}

demo/src/main/java/com/example/service/Impl/UserServiceImpl.java

@@ -0,0 +1,40 @@
+package com.example.service.Impl;
+
+import com.example.entity.User;
+import com.example.mapper.UserMapper;
+import com.example.service.UserService;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.stereotype.Service;
+
+import java.util.List;
+
+@Service
+public class UserServiceImpl implements UserService {
+    @Autowired
+    private UserMapper userMapper;
+
+    @Override
+    public List<User> list(){
+        return userMapper.list();
+    }
+
+    @Override
+    public void save(User user){
+        userMapper.save(user);
+    }
+
+    @Override
+    public User selectById(Long id){
+        return userMapper.selectById(id);
+    }
+
+    @Override
+    public void update(User user){
+        userMapper.update(user);
+    }
+
+    @Override
+    public void remove(Long id){
+        userMapper.deleteById(id);
+    }
+}

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

@@ -0,0 +1,18 @@
+package com.example.service;
+
+import com.example.entity.User;
+
+import java.util.List;
+
+public interface UserService {
+    List<User> list();
+
+    void save(User user);
+
+    User selectById(Long id);
+
+    void update(User user);
+
+    void remove(Long id);
+
+}

demo/src/main/resources/application.properties

@@ -1 +0,0 @@
-spring.application.name=demo

demo/src/main/resources/application.yml

@@ -0,0 +1,13 @@
+spring:
+  application:
+    name: demo
+  datasource:
+    url: jdbc:mysql://localhost:3306/userservice
+    username: root
+    password: 123456
+mybatis:
+  configuration:
+    map-underscore-to-camel-case: true
+    log-impl: org.apache.ibatis.logging.stdout.StdOutImpl
+  mapper-locations: classpath:mapper/*.xml
+

demo/src/main/resources/mapper/UserMapper.xml

@@ -0,0 +1,29 @@
+<?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">
+    <select id="list" resultType="com.example.entity.User">
+        select * from user
+    </select>
+
+    <insert id="save" >
+        insert into user (name,age) values (#{name},#{age})
+    </insert>
+
+    <select id="selectById" resultType="com.example.entity.User">
+        select * from user where id=#{id}
+    </select>
+
+    <update id="update">
+        update user 
+        <set>
+            <if test="name!=null and name!=''">name=#{name},</if>
+            <if test="age!=null">age=#{age}</if>
+        </set>
+        where id=#{id}
+    </update>
+
+    <delete id="deleteById" >
+        delete from user where id=#{id}
+    </delete>
+
+</mapper>

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

@@ -1,6 +1,6 @@
-package com.example.demo;
+package com.example;
 
-import com.example.demo.controller.UserController;
+import com.example.controller.UserController;
 import org.junit.jupiter.api.BeforeEach;
 import org.junit.jupiter.api.Test;
 import org.springframework.boot.test.context.SpringBootTest;