jpa之增删查改实例

@Entity
public class Girl {
    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private BigInteger id;
    private String name;
    /*为Girl对象的年龄添加注解*/
    @Min(value = 18,message = "未成年少女禁止入门")
    private String age;
    private String cupSize;
         ...
    getter()
    setter()
    toString()

@RequestMapping(value = "/girls")
public class GirlController {
    @Autowired
    private GirlService girlService;

    @PostMapping("")
    /*@Valid表示验证Girl对象
    * 将返回结果传给 BindingResult
    * */
    public void saveGirl(@Valid Girl girl, BindingResult bindingResult){
        if(bindingResult.hasErrors()){
            /*验证未通过,打印错误信息*/
            System.out.println(bindingResult.getFieldError().getDefaultMessage());
        }
        girlService.saveGirl(girl);
    }
}