ssm整合hibernate-validator

有关hibernate-validator的语法请参考：hibernate-validator 校验规则详解

    org.hibernate.validator
    hibernate-validator
    6.2.3.Final

@Getter
@Setter
@NoArgsConstructor
@AllArgsConstructor
@ToString
public class Province {
    
    private Integer id;

    
    @NotBlank(message = "省名不能为空")
    private String name;

    
    @NotBlank(message = "大区不能为空")
    private String area;

    
    @Range(min=0,max=255,message="优先级不能为空，且值需要在[0,255]")
    private Integer priority;

    
    private Byte status;
}

@Controller
@RequestMapping("/province")
public class ProvinceController {
    @Resource
    private ProvinceService provinceService;

    @PostMapping("/add")
    public String add(@Valid Province province, BindingResult result) {
        if(result.hasErrors()){
            //如果没有通过,跳转提示
            Map map = getErrors(result);
            //TODO 将错误以特定（比如，JSON）的格式传递给用户
            return "";
        }else {
            province.setStatus((byte) 1);
            provinceService.add(province);
            //重定向到列表页面
            return "redirect:/province/list";
        }
    }

    private Map getErrors(BindingResult result) {
        Map map = new HashMap< >();
        List list = result.getFieldErrors();
        for (FieldError error : list) {
            map.put(error.getField(), error.getDefaultMessage());
        }
        return map;
    }

}