1、2 建立list(RestController),并postman测试

1、主义实体类id   为String 类型（有用）

@Entity(name = "t_student")
public class Student {
    @Id
    private String sid;
    private String sname;
    private String pwd;
    

2、service层

@Service
public class StudentService implements IStudentService{
    @Resource private StudentRepository studentRepository;
 
    public List<Student> list() {
        // TODO Auto-generated method stub
        return studentRepository.findAll();
    }

3、控制层

@RestController
public class StudentController {
    @Resource private IStudentService studentService;
    @RequestMapping("/list")
    public Object list() {
        List<Student> list=studentService.list();
 
        return list;
    }}

4、postman测试