当我的请求出现问题时,我需要有自己的错误响应正文,而我正尝试使用@NotEmpty
约束消息属性来返回错误消息,
这是我的类,它使用所需的正文返回错误消息:
package c.m.nanicolina.exceptions;
import org.springframework.http.HttpStatus;
import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.MissingServletRequestParameterException;
import org.springframework.web.bind.annotation.ControllerAdvice;
import org.springframework.web.bind.annotation.ExceptionHandler;
import org.springframework.web.context.request.WebRequest;
@ControllerAdvice
public class CustomResponseEntityExceptionHandler {
@ExceptionHandler(value = {MissingServletRequestParameterException.class})
public ResponseEntity<ApiError> handleConflict(MissingServletRequestParameterException ex, WebRequest request) {
ApiError apiError = new ApiError(ex.getMessage(), ex.getMessage(), 1000);
return new ResponseEntity<ApiError>(apiError, null, HttpStatus.BAD_REQUEST);
}
}
有了这个CustomResponseEntityExceptionHandler
,我可以在验证错误的情况下返回自己的响应正文。
我现在正在尝试从验证约束中获取消息。
这是我的控制器,具有NotEmpty
约束:
package c.m.nanicolina.controllers;
import c.m.nanicolina.models.Product;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;
import javax.validation.constraints.NotEmpty;
@RestController
public class MinimumStockController {
@RequestMapping(value = "/minimumstock")
public Product product(
@RequestParam(value = "product.sku") @NotEmpty(message = "Product.sku cannot be empty") String sku,
@RequestParam(value = "stock.branch.id") String branchID) {
return null;
}
}
作为例外,我找不到获取该消息Product.sku cannot be empty
并将其显示在我的错误响应中的方法。
我还检查了类MissingServletRequestParameterException
,并且有方法getMessage
返回了默认消息。
答案 0 :(得分:4)
是的,它是可行的,并且spring很好地支持了它。您只是缺少一些在春天启用它的配置。
- 使用Spring
@Validated
注释使spring能够验证控制器- 在
ConstraintViolationException
中处理ControllerAdvice
,以捕获所有失败的验证消息。- 在
required=false
中标记@RequestParam
,因此它不会引发MissingServletRequestParameterException而是转到约束验证的下一步。
@ControllerAdvice
public class CustomResponseEntityExceptionHandler {
@ExceptionHandler
public ResponseEntity<ApiError> handle(ConstraintViolationException exception) {
//you will get all javax failed validation, can be more than one
//so you can return the set of error messages or just the first message
String errorMessage = new ArrayList<>(exception.getConstraintViolations()).get(0).getMessage();
ApiError apiError = new ApiError(errorMessage, errorMessage, 1000);
return new ResponseEntity<ApiError>(apiError, null, HttpStatus.BAD_REQUEST);
}
}
@RestController
@Validated
public class MinimumStockController {
@RequestMapping(value = "/minimumstock")
public Product product(
@RequestParam(value = "product.sku", required=false) @NotEmpty(message = "Product.sku cannot be empty") String sku,
@RequestParam(value = "stock.branch.id", required=false) String branchID) {
return null;
}
}
注意:: MissingServletRequestParameterException
将无法访问javax验证消息,因为它是在请求生命周期中进行约束验证之前抛出的。
答案 1 :(得分:0)
您应该将其放在处理程序上。
@ControllerAdvice
public class CustomResponseEntityExceptionHandler {
@ExceptionHandler(value = { MissingServletRequestParameterException.class })
public ResponseEntity<ApiError> handleConflict(MissingServletRequestParameterException ex, WebRequest request) {
String message = ex.getParameterName() + " cannot be empty";
ApiError apiError = new ApiError(ex.getMessage(), message, 1000);
return new ResponseEntity < ApiError > (apiError, null, HttpStatus.BAD_REQUEST);
}
}
更新
我不知道如何获取默认消息,但是作为一种变通办法,您可以在控制器上进行验证并在参数为空的情况下引发自定义异常,然后在CustomResponseEntityExceptionHandler
中进行处理。
类似以下内容:
设置required=false
@RequestMapping(value = "/minimumstock")
public Product product(@RequestParam(required = false) String sku, @RequestParam(value = "stock.branch.id") String branchID) {
if (StringUtils.isEmpty(sku))
throw YourException("Product.sku cannot be empty");
return null;
}
答案 2 :(得分:0)
是的,有可能。这样做:
@ExceptionHandler(MethodArgumentNotValidException.class)
public ResponseEntity<ArgumentsErrorResponseDTO> handleMethodArgumentNotValid(MethodArgumentNotValidException ex) {
ServiceException exception = ServiceException.wrap(ex, ErrorCode.FIELD_VALIDATION);
BindingResult results = ex.getBindingResult();
for (FieldError e: results.getFieldErrors()) {
exception.addLog(e.getDefaultMessage(), e.getField());
}
// log details in log
log.error("Invalid arguments exception: {}", exception.logWithDetails(), exception);
return ResponseEntity.status(exception.getErrorCode().getHttpStatus())
.body(ArgumentsErrorResponseDTO.builder()
.code(exception.getErrorCode().getCode())
.message(exception.getMessage())
.details(exception.getProperties())
.build());
}
答案 3 :(得分:0)
如果有帮助,我在这里找到了解决此问题的方法:https://howtodoinjava.com/spring-boot2/spring-rest-request-validation/
您必须将此方法添加到CustomResponseEntityExceptionHandler类:
@Override
protected ResponseEntity<Object> handleMethodArgumentNotValid(MethodArgumentNotValidException ex, HttpHeaders headers, HttpStatus status, WebRequest request) {
List<String> details = new ArrayList<>();
for(ObjectError error : ex.getBindingResult().getAllErrors()) {
details.add(error.getDefaultMessage());
}
ErrorMessage error = new ErrorMessage(new Date(), details.toString());
return new ResponseEntity<>(error, HttpStatus.BAD_REQUEST);
}