我正在使用Spring4开发RESTful应用程序。我想在POST请求中没有传递正文时处理大小写。 我编写了自定义异常处理程序:
@ControllerAdvice
public class MyRestExceptionHandler {
@ExceptionHandler
@ResponseStatus(HttpStatus.BAD_REQUEST)
public ResponseEntity<MyErrorResponse> handleJsonMappingException(JsonMappingException ex) {
MyErrorResponse errorResponse = new MyErrorResponse("request has empty body");
return new ResponseEntity<MyErrorResponse>(errorResponse, HttpStatus.BAD_REQUEST);
}
@ExceptionHandler(Throwable.class)
public ResponseEntity<MyErrorResponse> handleDefaultException(Throwable ex) {
MyErrorResponse errorResponse = new MyErrorResponse(ex);
return new ResponseEntity<MyErrorResponse>(errorResponse, HttpStatus.BAD_REQUEST);
}
}
@RestController
public class ContactRestController{
@RequestMapping(path="/contact", method=RequestMethod.POST)
public void save(@RequestBody ContactDTO contactDto) {...}
}
但是当它发生时,这些方法不会被召唤。我刚收到400 BAD REQUEST http状态和空身的响应。有人知道如何处理吗?
答案 0 :(得分:12)
我找到了如何抓住它。我的解决方案是:
@ControllerAdvice
public class RestExceptionHandler extends ResponseEntityExceptionHandler {
@Override
protected ResponseEntity<Object> handleHttpMessageNotReadable(HttpMessageNotReadableException ex, HttpHeaders headers, HttpStatus status, WebRequest request) {
// paste custom hadling here
}
}
答案 1 :(得分:1)
我遇到了类似的问题但它对我不起作用,因为提供的component-scan
软件包不包含我提供@ControllerAdvice
的软件包。
我的XML有:
<context:component-scan base-package="com.bandi.rest" />
我的包裹有一个拼写错误com.bandi.test.spring.exception
。将其更改为com.bandi.rest.spring.exception
后,它就开始工作了。
@ControllerAdvice
public class SpringRestExceptionHandler {
@ExceptionHandler(NoHandlerFoundException.class)
@ResponseStatus(HttpStatus.NOT_FOUND)
public @ResponseBody ResponseEntity<ErrorResponse> handleNoMethodException(HttpServletRequest request,
NoHandlerFoundException ex) {
ErrorResponse errorResponse = new ErrorResponse(ex);
errorResponse.setErrorMessage("resource not found with exception");
return new ResponseEntity<ErrorResponse>(errorResponse, HttpStatus.NOT_FOUND);
}
@ExceptionHandler(Throwable.class)
public @ResponseBody ResponseEntity<ErrorResponse> handleDefaultException(Throwable ex) {
ErrorResponse errorResponse = new ErrorResponse(ex);
errorResponse.setErrorMessage("request has empty body or exception occured");
return new ResponseEntity<ErrorResponse>(errorResponse, HttpStatus.BAD_REQUEST);
}
}
此外,如果您需要处理未找到所请求资源的情况(错误的URL),那么您必须向调度程序servlet添加另一个配置。
<servlet>
<servlet-name>dispatcher</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<init-param>
<param-name>throwExceptionIfNoHandlerFound</param-name>
<param-value>true</param-value>
</init-param>
<load-on-startup>2</load-on-startup>
</servlet>
完整的工作代码可用here
答案 2 :(得分:1)
我遇到了同样的问题,在花费大量时间调试问题后,我发现杰克逊没有正确地反序列化ErrorResponse
对象。
这是因为我没有为ErrorResponse
对象中定义的字段添加getter和setter方法。我正在使用构造函数初始化字段,并且没有为这些字段定义getter和setter。
解决方案:
因此,当我从{p>
ErrorResponse
与以下带有吸气剂和吸气剂的
import com.fasterxml.jackson.annotation.JsonRootName;
import java.util.List;
@JsonRootName("error")
public class ErrorResponse {
private String message;
private List<String> details;
public ErrorResponse(String message, List<String> details) {
this.message = message;
this.details = details;
}
}
Jackson现在正在正确地反序列化import com.fasterxml.jackson.annotation.JsonRootName;
import java.util.List;
@JsonRootName("error")
public class ErrorResponse {
private String message;
private List<String> details;
public ErrorResponse(String message, List<String> details) {
this.message = message;
this.details = details;
}
public String getMessage() {
return message;
}
public void setMessage(String message) {
this.message = message;
}
public List<String> getDetails() {
return details;
}
public void setDetails(List<String> details) {
this.details = details;
}
}
,并且在响应中得到了序列化的正文。
答案 3 :(得分:1)
在控制器类中,我把方法放在下面,它解决了我的问题。不需要控制器建议或任何其他。只需使用我们的用户异常与 body 本身覆盖 spring 默认异常即可解决问题。
@ResponseStatus(value = HttpStatus.BAD_REQUEST)
@ExceptionHandler(value = {MissingServletRequestParameterException.class})
ApiError handleMethodArgumentNotValid(MissingServletRequestParameterException ex) {
return new ApiError(ErrorCode.MISSING_REQUIRED_PARAMS, ex.getMessage());
}
答案 4 :(得分:0)
如果您已经有一个用@ControllerAdvice
注释的类,并且不想创建新的类,则可以使用以下代码:
@ExceptionHandler(HttpMessageNotReadableException.class)
public ResponseEntity<?> handleMissingRequestBody(Exception ex) {
return handle(BAD_REQUEST, ex);
}
它的行为应与 rvit34 的解决方案相同。
答案 5 :(得分:0)
就我而言,我需要处理所有具有无效参数的请求。因此,我使用 ResponseEntityExceptionHandler 扩展了我的类,并覆盖了方法 handleMissingServletRequestParameter 。您可以在类 ResponseEntityExceptionHandler
中找到自己定义的处理程序@ControllerAdvice 公共类YourExceptionHandler扩展了ResponseEntityExceptionHandler {
@ExceptionHandler(Exception.class)
public final ResponseEntity handleAllExceptions(Exception ex) {
// Log and return
}
@Override
public ResponseEntity<Object> handleMissingServletRequestParameter(MissingServletRequestParameterException ex, HttpHeaders headers, HttpStatus status, WebRequest request) {
// Do your code here
return new ResponseEntity<>("YOUR REQUEST PARAMS NOT MATCH!");
}
}
答案 6 :(得分:0)
override handleExceptionInternal
方法处理所有异常,所以你不需要重写每个处理方法:
@Override
protected ResponseEntity<Object> handleExceptionInternal(Exception ex, Object body, HttpHeaders headers,
HttpStatus status, WebRequest request) {
MyErrorResponse myErrorResponse = new MyErrorResponse();
MyErrorResponse.setMessage(ex.getMessage());
return new ResponseEntity<>(myErrorResponse, status);
}