SpringBoot集成MyBatis(主要用来方便的进行自定义一些sql查询，主要的简单的数据库操作还是依赖于自身提供的JPA)

1.配置数据源

spring.datasource.url=jdbc:mysql://localhost:3306/test
spring.datasource.username=root
spring.datasource.password=xdd123$%^
spring.datasource.driver-class-name=com.mysql.jdbc.Driver

2.定义mapper即接口，相当于dao层（这里是基于注解实现）

@Repository
public interface DemoMapper {
@Select("select * from user where id=#{id}")
User getUserById(@Param("id") int id);

@Select("select * from user")
List<Map<String,Object>> getUsers();
}

3.配置mapper扫描

@MapperScan("com.yangle.mapper")//在启动项中开启mapper的扫描
@SpringBootApplication
public class CommonFrameApplication {

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

4.现在可以在service层进行调用了

@Service
public class UserServiceImpl implements IUserService {
@Autowired
private DemoMapper demoMapper;//自动装配mapper
@Override
public User getUsers(int id) {
return demoMapper.getUserById(id);//调用mapper里的方法，操作数据库
}

@Override
public List<Map<String, Object>> getUsers() {
return demoMapper.getUsers();
}
}