1.pom文件引入 ~~~ <parent> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-parent</artifactId> <version>2.0.0.RELEASE</version> </parent> <dependencies> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter</artifactId> </dependency> <!-- 测试 --> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-test</artifactId> <scope>test</scope> </dependency> <!-- web组件 --> <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>1.3.1</version> </dependency> <!-- mysql依赖 --> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> </dependency> </dependencies> ~~~ 2.配置文件引入 ~~~ spring.datasource.driver-class-name=com.mysql.jdbc.Driver spring.datasource.url=jdbc:mysql://localhost:3306/demo1 spring.datasource.username=root spring.datasource.password=root ~~~ 3.后台代码 ~~~ //UserMapper类 public interface UserMapper { //查询语句 @Select("select * from user_t where username=#{username}") User findByName(@Param("username") String username); //添加 @Insert("insert into user_t(username,age) values(#{username},#{age})") int insert(@Param("username") String username,@Param("age") Integer age); } ~~~ ~~~ //UserService @Service public class UserService { @Autowired private UserMapper userMapper; public int insert(String username, Integer age){ int returnValue=userMapper.insert(username, age); return returnValue; } } ~~~ ~~~ @RestController public class UserController { @Autowired private UserService userService; @RequestMapping("/insertUser") public Integer insertUser(String username, Integer age){ return userService.insert(username, age); } } ~~~ ~~~ //启动类 /*** * 1.mybatis启动方式可以在mapper层不需要加mapper注解 但是一定要在启动类加上@MapperScan * 2.mapper接口加了@Mapper,就在启动类加上@MapperScan * @author Administrator * */ @SpringBootApplication //@MapperScan(basePackages={"cn.li.mapper"}) public class AppConfig { public static void main(String[] args) { SpringApplication.run(AppConfig.class, args); } } ~~~ 访问http://localhost:8080/insertUser?username=zhangsan&age=20 可以看到数据库中插入了一条数据