Java框架之Maven SSM集合

目录

• SSM
• Maven

• 什么是maven
• Maven好处，为什么要用Maven
• 三种仓库
• 坐标概念

@Controller//controller层专属注解
@RequestMapping("/student")
public class StudentController {
    @Autowired
    private IStudentService studentService;
    @RequestMapping("/selectAll")
    @ResponseBody
    public List<Student> selectAll (){
        System.out.println("StudentController.selectAll");
        List<Student> list = studentService.selectAll();
        return list;
    }
}

public interface IStudentService {
    public List<Student> selectAll();
}

@Service//service层专属注解
public class StudentServiceImpl implements IStudentService {
    @Autowired
    private IStudentMapper studentMapper;
    @Override
    public List<Student> selectAll() {
        System.out.println("StudentServiceImpl.selectAll");
        return studentMapper.selectAll();
    }
}

public interface IStudentMapper {
    public List<Student> selectAll();
}

<mapper namespace="ssm.mapper.StudentMapper">
	<!-- public List<User> selectAll(); -->
	<select id="selectAll" resultType="Student">
		SELECT `id`,`name`,`age`,`gender`,`class_id` FROM `student`
	</select>
</mapper>