Spring验证：自定义验证@RequestBody基于标准@RequestParam

Question

我想用@Valid 注解验证请求体。 在该方法中有一个 @RequestParam 值。 如果这个@RequestParam 值“min”，我希望requestbody 中的一个字段是强制性的。可以用注解吗？

@RequestMapping(method = RequestMethod.POST, value = ProductionResponse.URL, produces = JWSMessageConverter.JWS_MEDIA_TYPE_VALUE)
@ResponseBody
public ResponseEntity<ProductionResponse> richiestaProduzione(@RequestParam("issuerType") String issuerType,
        @RequestParam("issuerCode") String issuerCode, @RequestParam("procedureId") String procedureId,
        @Valid @RequestBody ProductionRequestResource requestBody) {
    if (LOGGER.isDebugEnabled())
        LOGGER.debug("POST " + ProductionResponse.URL);
  @Valid ProductionRequestResource fff = requestBody;
    requestBody.setProcedureResource(issuerType, issuerCode, procedureId);

    try {
        ProductionResponse response = produzioneService.richiestaProduzione(requestBody);
        return ResponseEntity.ok(response);
    } catch (Exception e) {
        LOGGER.error(e.getMessage(), e);
        return ResponseEntity.badRequest().body(ProductionResponse.ko(requestBody, e.getMessage(), requestBody.getNun()));
    }
}

如果 issuerType 等于“MIN”，我希望 ProductionRequestResource 中的字段 issuerMunicipalityCode 是强制性的。

Answer 1

为了进一步继续，这里是您可以实现自定义验证的方法。

添加验证以在 issueType 为 MIN 且市政代码为空/null 时引发异常。

@RequestMapping(method = RequestMethod.POST, value = ProductionResponse.URL, produces = JWSMessageConverter.JWS_MEDIA_TYPE_VALUE)
@ResponseBody
public ResponseEntity<ProductionResponse> richiestaProduzione(@RequestParam("issuerType") String issuerType,
        @RequestParam("issuerCode") String issuerCode, @RequestParam("procedureId") String procedureId,
        @RequestBody ProductionRequestResource requestBody) {
    if (LOGGER.isDebugEnabled())
        LOGGER.debug("POST " + ProductionResponse.URL);

    if("MIN".equals(issuerType) && StringUtils.isEmpty(requestBody.getIssuerMunicipalityCode())) {
        throw new IllegalArgumentException("IssuerMuncipalityCode can't be null when IssuerType is MIN");
    }

    try {
        ProductionResponse response = produzioneService.richiestaProduzione(requestBody);
        return ResponseEntity.ok(response);
    } catch (Exception e) {
        LOGGER.error(e.getMessage(), e);
        return ResponseEntity.badRequest().body(ProductionResponse.ko(requestBody, e.getMessage(), requestBody.getNun()));
    }
}

实现异常处理程序以捕获异常并根据异常类型构建响应体。上面抛出的 InvalidArgumentSuppliedException 将被下面的异常处理程序捕获。异常处理程序是在单独的组件中处理异常的最佳实践。

@ControllerAdvice
public class ScnSchedulerExceptionHandler {

    @ExceptionHandler(InvalidArgumentSuppliedException.class)
    public final ResponseEntity<Object> handleInvalidArgException(Exception ex) {
        ErrorResponseDTO errorDTO = new ErrorResponseDTO();
        errorDTO.setMessage(ex.getMessage());
        return new ResponseEntity<>(errorDTO, HttpStatus.NOT_ACCEPTABLE);
    }

    @ExceptionHandler(Exception.class)
    public final ResponseEntity<Object> handleAllExceptions(Exception ex) {
        ErrorResponseDTO errorDTO = new ErrorResponseDTO();
        errorDTO.setMessage("Internal server error occurred.");
        return new ResponseEntity<>(errorDTO, HttpStatus.INTERNAL_SERVER_ERROR);
    }
}

在异常处理程序中，将错误消息包装在 pojo 对象中。

public class ErrorResponseDTO {

    private String errorMessage;

}