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This article will explain in detail how to customize abnormal responses in springBoot. The content of the article is of high quality, so the editor shares it for you as a reference. I hope you will have some understanding of the relevant knowledge after reading this article.

1 Custom exception returns json data,

/ / Don't forget to add @ ControllerAdvice

@ ControllerAdvice

Public class myExceptionHandler {

/ / both the browser and the client return json// @ ResponseBody

@ ExceptionHandler (UserNotExist.class)

Public Map handlerException (Exception e) {Map map = new HashMap (); map.put ("code", "user.notexist"); map.put ("message", e.getMessage ()); return map

}}

2 forward to / error for adaptive response @ ControllerAdvice public class myExceptionHandler {

/ both the browser and the client return json@ExceptionHandler (UserNotExist.class) public String handlerException (Exception e, HttpServletRequest request) {Map map = new HashMap (); request.setAttribute ("javax.servlet.error.status_code", 500); map.put ("code", "user.notexist"); map.put ("message", e.getMessage ()); request.setAttribute ("ext", map) Return "forward:/error";}

}

3 take customized errors out @ Component

Public class myErrorAtrributes extends DefaultErrorAttributes {

/ / WebRequest webRequest, note that the 1.x.x version is written differently from 2.1.0. Mine is 2.1.0public Map getErrorAttributes (WebRequest webRequest, boolean includeStackTrace) {Map errorAttributes = super.getErrorAttributes (webRequest,includeStackTrace); errorAttributes.put ("com", "maodong"); Map ext= (Map) webRequest.getAttribute ("ext", 0); errorAttributes.put ("ext", ext); return errorAttributes }

}

/ / Why do you write this: methods in the parent class DefaultErrorAttributes class

Public Map getErrorAttributes (WebRequest webRequest, boolean includeStackTrace) {

Map errorAttributes = new LinkedHashMap (); errorAttributes.put ("timestamp", new Date ()); this.addStatus (errorAttributes, webRequest); this.addErrorDetails (errorAttributes, webRequest, includeStackTrace); this.addPath (errorAttributes, webRequest); return errorAttributes;} / / Why can WebRequest webRequest get the same result as the lower version RequestAttrributes public interface WebRequest extends RequestAttributes {@ NullableString getHeader (String var1); @ NullableString [] getHeaderValues (String var1) Iterator getHeaderNames (); -} / / Why Map ext= (Map) webRequest.getAttribute ("ext", 0); can get extpublic interface RequestAttributes {int SCOPE_REQUEST = 0poliint SCOPE_SESSION = 1X string REFERENCE_REQUEST = "request"; String REFERENCE_SESSION = "session"; @ NullableObject getAttribute (String var1, int var2); void setAttribute (String var1, Object var2, int var3); void removeAttribute (String var1, int var2) So much for sharing about how to customize exception responses in springBoot. I hope the above content can be helpful to you and you can learn more. If you think the article is good, you can share it for more people to see.

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