springboot+Validator+全局异常

新建model，为相关字段添加validator注解

@Data
public class InformationModel implements Serializable {
    private static final long serialVersionUID = InformationModel.class.getName().hashCode();
    /** ID */
    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private Integer id;
    /** 文章标题 */
    @NotNull(message = "文章标题不能为空")
    @Size(min = 6, max = 11, message = "账号长度必须是6-11个字符")
    private String articleTitle;
    /** 标题图片 */
    private String headerImage;
    /** 发布时间 */
    private String releaseTime;
    /** 发布人 */
    private String user;
    /** 修改时间 */
    private String updateTime;
    /** 状态 */
    private String status;
}

 

在controller中为需要验证的参数加上@Valid注解

 

@PostMapping
    public ResultData add(@ModelAttribute @Valid InformationModel informationModel) {
        if (StrUtil.isBlank(informationModel.getHeaderImage())){
            throw new TestException(SystemTip.SYSTEM_ERROR);
        }
        int count = informationService.insert(informationModel);
        // 操作数量小于0
        if (count <= 0) {
            return ResultData.result(SystemTip.INSERT_FAIL);
        }
        return ResultData.success();
    }

 

在全局异常处理类添加BindException异常处理

@Slf4j
@ControllerAdvice
public class BasicExceptionHandler {

    @ExceptionHandler
    public void handler(Exception e, HandlerMethod handlerMethod, HttpServletResponse response){
        if (e instanceof TestException){
            ResultUtil.responseJson(response,((TestException)e).toResultData());
        }else if(e instanceof BindException){
            ResultUtil.responseJson(response,bindExceptionHandler((BindException)e));
        }else {
            log.error("{} method name: {}() handler error",handlerMethod.getBeanType(),handlerMethod.getMethod().getName(),e);
            ResultUtil.responseJson(response,new TestException(SystemTip.SYSTEM_ERROR).toResultData());
        }
    }

    public ResultData bindExceptionHandler(BindException e) {
        // 从异常对象中拿到ObjectError对象
        ObjectError objectError = e.getBindingResult().getAllErrors().get(0);
        // 然后提取错误提示信息进行返回
        return ResultData.result(SystemTip.PARAM_VALID_FAIL,objectError.getDefaultMessage());
    }
}