spring boot整合MyBatis

本博文主要讲解spring boot项目整合MyBatis
1.最终项目结构图

2.文件清单
清单: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 http://maven.apache.org/xsd/maven-4.0.0.xsd">
	<modelVersion>4.0.0</modelVersion>

	<groupId>com.example</groupId>
	<artifactId>demo-springboot-MyBatis</artifactId>
	<version>0.0.1-SNAPSHOT</version>
	<packaging>jar</packaging>

	<name>demo-springboot-MyBatis</name>
	<description>Demo project for Spring Boot</description>

	<parent>
		<groupId>org.springframework.boot</groupId>
		<artifactId>spring-boot-starter-parent</artifactId>
		<version>1.5.1.RELEASE</version>
		<relativePath /> <!-- lookup parent from repository -->
	</parent>

	<properties>
		<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
		<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
		<java.version>1.8</java.version>
	</properties>

	<dependencies>
		<!-- MyBatis -->
		<dependency>
			<groupId>org.mybatis.spring.boot</groupId>
			<artifactId>mybatis-spring-boot-starter</artifactId>
			<version>1.2.0</version>
		</dependency>

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

		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-test</artifactId>
			<scope>test</scope>
		</dependency>
		<!-- mysql驱动 -->
		<dependency>
			<groupId>mysql</groupId>
			<artifactId>mysql-connector-java</artifactId>
		</dependency>
	</dependencies>

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


</project>

清单：User.java

package com.example.pojo;

public class User {
	private Long id;
	private String userName;
	private String userSex;
	private int userAge;

	public User() {

	}

	public User(String userName, String userSex, int userAge) {
		super();
		this.userName = userName;
		this.userSex = userSex;
		this.userAge = userAge;
	}

	public Long getId() {
		return id;
	}

	public void setId(Long id) {
		this.id = id;
	}

	public String getUserName() {
		return userName;
	}

	public void setUserName(String userName) {
		this.userName = userName;
	}

	public String getUserSex() {
		return userSex;
	}

	public void setUserSex(String userSex) {
		this.userSex = userSex;
	}

	public int getUserAge() {
		return userAge;
	}

	public void setUserAge(int userAge) {
		this.userAge = userAge;
	}

}

清单：UserMapper.java

package com.example.mapper;

import java.util.List;

import org.apache.ibatis.annotations.Delete;
import org.apache.ibatis.annotations.Insert;
import org.apache.ibatis.annotations.Param;
import org.apache.ibatis.annotations.Result;
import org.apache.ibatis.annotations.Results;
import org.apache.ibatis.annotations.Select;
import org.apache.ibatis.annotations.Update;

import com.example.pojo.User;

public interface UserMapper {
	/**
	 * 查询所有用户信息
	 * 
	 * @return
	 */
	@Select("select * from user")
	@Results(value = { @Result(property = "userSex", column = "user_sex", javaType = String.class),
			@Result(property = "userName", column = "user_name"), @Result(property = "userAge", column = "user_age") })
	List<User> findList();

	/**
	 * 通过ID查询
	 * 
	 * @param id
	 * @return
	 */
	@Select("select * from user u where u.id=#{id}")
	User findOne(@Param("id") Long id);

	/**
	 * 新增一个
	 * 
	 * @param user
	 */
	@Insert("insert into user (user_name,user_sex,user_age) values(#{userName},#{userSex},#{userAge})")
	void insert(User user);

	/**
	 * 修改
	 * 
	 * @param user
	 */
	@Update("update user u set u.user_name=#{userName},u.user_sex=#{userSex},u.user_age=#{userAge} where u.id=#{id}")
	void update(User user);

	/**
	 * 删除
	 * 
	 * @param id
	 */
	@Delete("delete from user where id=#{id}")
	void delete(@Param("id") Long id);
}

清单:UserController.java

package com.example.controller;

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;

import com.example.mapper.UserMapper;
import com.example.pojo.User;

@RestController
public class UserController {

	@Autowired
	UserMapper userMapper;

	/**
	 * index
	 * 
	 * @return
	 */
	@RequestMapping("/")
	public String index() {
		return "User Info By MyBatis";
	}

	@RequestMapping("/user/list.json")
	public Object allUsers() {
		List<User> users = userMapper.findList();
		return users;
	}

}

清单：Application.java

package com.example;

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

@SpringBootApplication
@MapperScan(basePackages = { "com.example.mapper" }) // 自动扫描mapper
@EnableTransactionManagement//启用事物管理,在service上使用@Transactional（注意是spring的 注解）
public class Application {

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

}

清单：application.properties

#==================DataSource Config Start================== 
#name
#spring.datasource.name=test
#url
#spring.datasource.url=jdbc:sqlserver://192.168.xxx.xxx;instanceName=sql_03;DatabaseName=edu;integratedSecurity=false
spring.datasource.url=jdbc:mysql://localhost:3306/test?useUnicode=true&characterEncoding=utf-8
#DriverClass
#spring.datasource.driver-class-name=com.microsoft.sqlserver.jdbc.SQLServerDriver
spring.datasource.driver-class-name=com.mysql.jdbc.Driver
#DB username
spring.datasource.username=root
#DB password
spring.datasource.password=root
#==================DataSource Config End==================

#==================MyBatis Config Start==================
#ORM Bean Package
mybatis.type-aliases-package=com.example.pojo
mybatis.mapper-locations=classpath:/mapper/*.xml
#打印MyBatisSql语句
logging.level.com.example.mapper=DEBUG
#==================MyBatis Config End  ==================

清单:UserMapperTest.java

package com.example.test;

import java.util.List;

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.test.context.junit4.SpringRunner;

import com.example.mapper.UserMapper;
import com.example.pojo.User;

@RunWith(SpringRunner.class)
@SpringBootTest
public class UserMapperTest {
	@Autowired
	private UserMapper userMapper;

	// @Test
	public void testInsert() {
		try {
			userMapper.insert(new User("xqlee1", "男", 26));
			userMapper.insert(new User("xqlee2", "男", 23));
			userMapper.insert(new User("xqlee3", "男", 27));
		} catch (Exception e) {
			e.printStackTrace();
		}
	}

	// @Test
	public void testUpdate() {
		try {
			User user = new User("测试0000", "男", 23);
			user.setId(1l);
			userMapper.update(user);
		} catch (Exception e) {
			e.printStackTrace();
		}
	}

	//@Test
	public void testQuery() {
		try {
			List<User> users=userMapper.findList();
			for(User u:users){
				System.out.println("ID:"+u.getId()+" Name:"+u.getUserName()+" Sex:"+u.getUserSex()+" Age:"+u.getUserAge());
			}
		} catch (Exception e) {
			e.printStackTrace();
		}
	}
	
	@Test
	public void testDelete(){
		try {
			userMapper.delete(1l);
			testQuery();
		} catch (Exception e) {

			e.printStackTrace();
		}
		
	}
}

spring boot MyBatis

https://www.leftso.com/article/80.html