mybatis-spring-boot-autoconfigure ：http://www.mybatis.org/spring-boot-starter/mybatis-spring-boot-autoconfigure/index.html

mybatis：http://www.mybatis.org/mybatis-3/zh/index.html

1.maven依赖

<?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>
	<parent>
		<groupId>org.springframework.boot</groupId>
		<artifactId>spring-boot-starter-parent</artifactId>
		<version>2.0.3.RELEASE</version>
		<relativePath/> <!-- lookup parent from repository -->
	</parent>
	<groupId>priv.gitonlie.mybatis</groupId>
	<artifactId>mybatis</artifactId>
	<version>0.0.1-SNAPSHOT</version>
	<name>springboot-mybatis</name>
	<description>mybatis project for Spring Boot</description>

	<properties>
		<java.version>1.8</java.version>
		<mybatis.springboot.version>1.3.2</mybatis.springboot.version>
	</properties>

	<dependencies>
		<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>${mybatis.springboot.version}</version>
		</dependency>
		
		<dependency>
			<groupId>mysql</groupId>
			<artifactId>mysql-connector-java</artifactId>
		</dependency>
		
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-test</artifactId>
			<scope>test</scope>
		</dependency>
	</dependencies>

	<build>
		<plugins>
			<plugin>
				<groupId>org.springframework.boot</groupId>
				<artifactId>spring-boot-maven-plugin</artifactId>
			</plugin>
			<plugin><!-- 跳过单元测试 -->
		        <groupId>org.apache.maven.plugins</groupId>
		        <artifactId>maven-surefire-plugin</artifactId>
		        <configuration>
		          <skipTests>true</skipTests>
		        </configuration>
		     </plugin>
		</plugins>
	</build>

</project>

2.application.yml配置

spring:
  application:
    name: mybatis-server
  datasource:
    driverClassName: com.mysql.jdbc.Driver
    url: jdbc:mysql://localhost:3306/flowable_demo?useUnicode=true&characterEncoding=utf-8
    username: root
    password: admin123456
 
server:
  port: 8081

mybatis:
  type-aliases-package: priv.gitonlie.mybatis.entity
  mapper-locations:
  - classpath:mapper/*.xml

3.实体类

public class User {
	
	private String id;
	
	private String name;
	
	private String password;
	
	private String token;

	public String getId() {
		return id;
	}

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

	public String getName() {
		return name;
	}

	public void setName(String name) {
		this.name = name;
	}

	public String getPassword() {
		return password;
	}

	public void setPassword(String password) {
		this.password = password;
	}

	public String getToken() {
		return token;
	}

	public void setToken(String token) {
		this.token = token;
	}

}

4.Mapper接口

public interface UserMapper {
	
	List<User> queryAllUser();
}

5.mapper.xml

<?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="priv.gitonlie.mybatis.mapper.UserMapper">
	<select id="queryAllUser" resultType="User">
		select * from user
	</select>
</mapper>

6.service服务层

@Service
public class UserService {
	
	@Autowired
	private UserMapper userMapper;
	
	public List<User> queryAll(){
		return userMapper.queryAllUser();
	}
}

7.controller控制层

@RestController
public class UserController {
	
	@Autowired
	private UserService service;
	
	@GetMapping("demo")
	public List<User> queryAll(){
		List<User> list = service.queryAll();
		return list;
	}
}

8.启动访问