前端參數統一校驗工具類ValidParamUtils

1，前端參數不可信，對於後端開發人員來講應該是一條鐵律，因此對於前端參數的校驗，必不可少，而統一的前端參數校驗工具，對咱們進行參數校驗起到事半功倍的效果

2，統一參數校驗工具ValidParamUtils

public class ValidParamUtils {

    public static void validInputParams(BindingResult bindingResult) throws ParameterValidErrorException {
        if(bindingResult.hasErrors()) {
           //若是對於字段的校驗出現錯誤，拋出統一自定義參數異常
            String errorMessage = ValidParamUtils.errorParamInfo(bindingResult);
            if (!StringUtils.isBlank(errorMessage)){
                throw new ParameterValidErrorException(ErrorCode.BAD_REQUEST, errorMessage);
            }
            throw new ParameterValidErrorException(ErrorCode.BAD_REQUEST);
        }
    }

    public static String errorParamInfo(BindingResult bindingResult) {
      //從綁定結果中，獲取錯誤信息
        FieldError fe = bindingResult.getFieldError();
        
        if(fe != null) {
            return fe.getDefaultMessage();
        }
        
        ObjectError oe = bindingResult.getGlobalError();
        if(oe != null) {
            return oe.getDefaultMessage();
        }
        
        return "";
    }

3，自定義參數異常

public abstract class ParamErrorException extends RuntimeException {

    /**
     *
     */
    private static final long serialVersionUID = 1L;
    private ErrorCode errorCode;

    public BaseException() {
    }

    public BaseException(ErrorCode errorCode) {
        super(errorCode.getName());
        this.errorCode = errorCode;
    }

    public BaseException(ErrorCode errorCode, String msg) {
        super(msg);
        this.errorCode = errorCode;
    }

    public ErrorCode getErrorCode() {
        return errorCode;
    }

    public void setErrorCode(ErrorCode errorCode) {
        this.errorCode = errorCode;
    }
}

4,使用自定義的統一參數校驗工具

 @PostMapping(value = "/manage/ads/theme/add")
    public Result addThemeActivity(@RequestBody @Validated(value = {AddOrUpdateThemeActivityRequest.AddThemeActivityGroup.class}) AddOrUpdateThemeActivityRequest addOrUpdateThemeActivityRequest, BindingResult bindingResult) {
        LOGGER.info("manage addThemeActivity param:{}", JSON.toJSONString(addOrUpdateThemeActivityRequest));
        //參數校驗
        ValidParamUtils.validInputParams(bindingResult);
        Integer themeActivityNum = themeActivityService.selectThemeActivityByTitleAndId(addOrUpdateThemeActivityRequest.getTitle(), null);
        if (themeActivityNum > 0) {
            LOGGER.warn(String.format("%s. title:%s", ErrorCode.MANAGE_PROJECT_THEME_TITLE_EXIST.getName(), addOrUpdateThemeActivityRequest.getTitle()));
            return Result.builder().failed(ErrorCode.MANAGE_PROJECT_THEME_TITLE_EXIST).build();
        }
        managerBannerService.insertThemeActivityInfo(addOrUpdateThemeActivityRequest);
        sendBizLog(addOrUpdateThemeActivityRequest.getTitle());
        LOGGER.info("manage addThemeActivity success. ");
        return Result.builder().data("新增專題活動成功").success().build();
    }