Spring Boot2.X-整合mybatis+mysql

目录

1.linux安装mysql8.0

​2.安装mysql客户端Navicat Premium 12

3.spring boot 集成mybatis,mysql

4.测试

5.源码下载

---

源码下载：https://download.youkuaiyun.com/download/adam_zs/24945109

1.linux安装mysql8.0

参考：https://blog.youkuaiyun.com/young_0609/article/details/109015666

2.安装mysql客户端Navicat Premium 12

3.spring boot 集成mybatis,mysql

 pom.xml

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
	<modelVersion>4.0.0</modelVersion>
	<parent>
		<groupId>org.springframework.boot</groupId>
		<artifactId>spring-boot-starter-parent</artifactId>
		<version>2.5.5</version>
		<relativePath /> <!-- lookup parent from repository -->
	</parent>
	<groupId>com.wzs.springboot</groupId>
	<artifactId>springboot.mybatis</artifactId>
	<version>1.0.0</version>
	<name>spring-boot-mybatis-mysql</name>
	<description>Spring Boot Mybatis Mysql</description>
	<properties>
		<java.version>1.8</java.version>
	</properties>

	<dependencies>
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-jdbc</artifactId>
		</dependency>
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-web</artifactId>
		</dependency>
		<dependency>
			<groupId>org.mybatis.spring.boot</groupId>
			<artifactId>mybatis-spring-boot-starter</artifactId>
			<version>1.3.2</version>
		</dependency>

		<dependency>
			<groupId>mysql</groupId>
			<artifactId>mysql-connector-java</artifactId>
			<scope>runtime</scope>
		</dependency>

		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-test</artifactId>
		</dependency>

		<dependency>
			<groupId>junit</groupId>
			<artifactId>junit</artifactId>
		</dependency>

		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-test</artifactId>
		</dependency>

		<dependency>
			<groupId>org.projectlombok</groupId>
			<artifactId>lombok</artifactId>
			<optional>true</optional>
		</dependency>
	</dependencies>


	<build>
		<plugins>
			<plugin>
				<groupId>org.springframework.boot</groupId>
				<artifactId>spring-boot-maven-plugin</artifactId>
			</plugin>
		</plugins>
	</build>
</project>

 application.yml

server:
  port: 8080  #tomcat端口
 
spring: #springboot的配置
  datasource: #定义数据源
    name: mysqlTest #定义数据源的名字
    #10.18.22.10 服务器地址,mysql数据库名字
    url: jdbc:mysql://10.18.xx.xx:3306/wzsmysql?serverTimezone=GMT%2B8&useSSL=FALSE
    username: root  #数据库用户名，root为管理员
    password: 123456 #该数据库用户的密码
 
mybatis:  #mybatyis的配置
  mapper-locations: classpath:mapper/*.xml #指定mapper的配置文件的路径是mapper文件夹下的所有xml文件。

建表

CREATE TABLE user(
  id INT PRIMARY KEY AUTO_INCREMENT COMMENT '学号',
  name VARCHAR(20) COMMENT '姓名',
  age    int COMMENT '年龄'
) COMMENT='学生信息';

select * from user;
insert user(id,name,age) VALUES(null,'wangzs1',31);
insert user(id,name,age) VALUES(null,'wangzs2',32);
insert user(id,name,age) VALUES(null,'wangzs3',33);
insert user(id,name,age) VALUES(null,'wangzs4',34);

package com.wzs.springboot.mybatis;

import org.mybatis.spring.annotation.MapperScan;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

@SpringBootApplication
@MapperScan("com.wzs.springboot.mybatis")
public class SpringBootMybatisMysqlApplication {

	public static void main(String[] args) {
		SpringApplication.run(SpringBootMybatisMysqlApplication.class, args);
	}

}

package com.wzs.springboot.mybatis;

import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;

@Data
@AllArgsConstructor
@NoArgsConstructor
public class User {
	private Integer id;
	private String name;
	private Integer age;
}

package com.wzs.springboot.mybatis;

import java.util.List;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

@RestController
@RequestMapping(value = "/user")
public class UserController {
	@Autowired
	private UserServiceImpl userService;

	@RequestMapping("/findAll")
	public String findAll() {
		List<User> users = userService.findAll();
		return users.toString();
	}

	@RequestMapping("/add")
	public int addUser() {
		User u = new User(null, "wangzs-" + System.currentTimeMillis(), 45);
		int stat = userService.addUser(u);
		return stat;
	}
}

package com.wzs.springboot.mybatis;

import java.util.List;

public interface UserMapper {
	int insertUser(User user);

	int deleteUser(Integer id);

	User selectUser(Integer id);

	int updateUser(User user);

	List<User> selectAll();
}

package com.wzs.springboot.mybatis;

import java.util.List;

public interface UserService {
	int addUser(User user);

	int deleteUser(Integer id);

	User selectUser(Integer id);

	int updateUser(User user);

	List<User> findAll();
}

package com.wzs.springboot.mybatis;

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 int addUser(User user) {
		return userMapper.insertUser(user);
	}

	@Override
	public int deleteUser(Integer id) {
		return userMapper.deleteUser(id);
	}

	@Override
	public User selectUser(Integer id) {
		return userMapper.selectUser(id);
	}

	@Override
	public List<User> findAll() {
		return userMapper.selectAll();
	}

	@Override
	public int updateUser(User user) {
		return userMapper.updateUser(user);
	}
}

UserMapper.xml

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://www.mybatis.org/dtd/mybatis-3-mapper.dtd" >
<!--上面2行的是约束依赖，固定照抄就好 -->
<!--下面的才是要自己编写的地方 -->
<!--写mapper的配置文件第一步就是要写<mapper></mapper>标签 -->
<!--<mapper></mapper>标签里包含着各个CURD操作的SQL语句 -->
<mapper namespace="com.wzs.springboot.mybatis.UserMapper">
	<!--定义一个名为BaseResultMap的返回类型 -->
	<resultMap id="BaseResultMap" type="com.wzs.springboot.mybatis.User">
		<id column="id" property="id" jdbcType="INTEGER"></id>
		<result column="name" property="name" jdbcType="VARCHAR"></result>
		<result column="age" property="age" jdbcType="INTEGER"></result>
	</resultMap>

	<!--插入语句 -->
	<!--id要与UserMapper文件中表示插入的函数名一致，parameterType表示函数的输入参数的类型 -->
	<insert id="insertUser" parameterType="com.wzs.springboot.mybatis.User">
		insert into
		user(id,name,age)values(#{id,jdbcType=INTEGER},#{name,jdbcType=VARCHAR},#{age,jdbcType=INTEGER})/*SQL语句*/
	</insert>

	<!--删除语句 -->
	<delete id="deleteUser" parameterType="java.lang.Integer">
		delete from user where id =#{id,jdbcType=INTEGER}
	</delete>

	<!--查找语句 -->
	<!--resultMap表示函数返回的类型 -->
	<select id="selectUser" parameterType="java.lang.Integer" resultMap="BaseResultMap">
		select * from user where id =
		#{id,jdbcType=INTEGER}
	</select>

	<!--查找语句 -->
	<select id="selectAll" resultMap="BaseResultMap">
		select * from user
	</select>

	<!--修改语句 -->
	<update id="updateUser" parameterType="com.wzs.springboot.mybatis.User">
		update user set
		name=#{name,jdbcType=VARCHAR},age=#{age,jdbcType=INTEGER}
		where id=#{id,jdbcType=INTEGER}
	</update>
</mapper>

4.测试

package com.wzs.springboot.mybatis;

import java.net.MalformedURLException;
import java.net.URL;

import org.junit.Before;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.boot.test.web.client.TestRestTemplate;
import org.springframework.boot.web.server.LocalServerPort;
import org.springframework.http.ResponseEntity;
import org.springframework.test.context.junit4.SpringRunner;

@RunWith(SpringRunner.class)
@SpringBootTest(webEnvironment = SpringBootTest.WebEnvironment.RANDOM_PORT)
public class SpringBootMybatisMysqlApplicationTests {
	@LocalServerPort
	private int port;

	private URL base;

	@Autowired
	private TestRestTemplate restTemplate;

	@Autowired
	private UserServiceImpl userService;

	@Before
	public void setUp() throws MalformedURLException {
		String url = String.format("http://localhost:%d/", port);
		System.out.println(String.format("##SpringBootMybatisMysqlApplicationTests port is : [%d]", port));
		this.base = new URL(url);
	}

	@Test
	public void findAll_test() {
		ResponseEntity<String> response = this.restTemplate.getForEntity(this.base.toString() + "/user/findAll",
				String.class);
		System.out.println(response);
	}

	@Test
	public void add_test() {
		ResponseEntity<String> response = this.restTemplate.getForEntity(this.base.toString() + "/user/add",
				String.class);
		System.out.println(response);
	}

	@Test
	public void selectUser_test() {
		User user = userService.selectUser(11);
		System.out.println(user);
	}

	@Test
	public void updateUser_test() {
		User user = userService.selectUser(11);
		System.out.println(userService.selectUser(11));
		user.setName("wangsm");
		userService.updateUser(user);
		System.out.println(userService.selectUser(11));
	}
}

5.源码下载

https://download.youkuaiyun.com/download/adam_zs/24945109