在 Spring Boot 1.5.3 中,我的 @ControllerAdvice 注释 ExceptionHandler 遇到了一个特殊情况。它捕获任何异常默认异常,但如果我抛出自定义异常,它不会触发。
异常处理程序:
@ControllerAdvice
public class ResponseEntityExceptionHandler {
@ExceptionHandler({ HttpMessageNotReadableException.class })
protected ResponseEntity<ErrorModel> handleInvalidJson(RuntimeException e, WebRequest request) {
return new ResponseEntity<ErrorModel>(new ErrorModel().message("Could not parse JSON."), HttpStatus.BAD_REQUEST);
}
@ExceptionHandler({ NumberFormatException.class })
protected ResponseEntity<ErrorModel> handleInvalidRequest(RuntimeException e, WebRequest request) {
return new ResponseEntity<ErrorModel>(new ErrorModel().message("Invalid request parameter."), HttpStatus.BAD_REQUEST);
}
@ExceptionHandler({ CannotCreateTransactionException.class })
protected ResponseEntity<ErrorModel> handleTransactionCreationException(RuntimeException e, WebRequest request) {
return new ResponseEntity<ErrorModel>(new ErrorModel().message("Error connecting to the database, please make sure it is still available."), HttpStatus.BAD_REQUEST);
}
@ExceptionHandler({ NotFoundException.class })
protected ResponseEntity<ErrorModel> handleApiException(RuntimeException e, WebRequest request) {
return new ResponseEntity<ErrorModel>(new ErrorModel().message(e.getMessage()), HttpStatus.NOT_FOUND);
}
}
前 3 个异常都按预期被捕获和处理,但底部异常由默认的 Spring-Boot ExceptionHandler 处理。这是我在 Controller 中抛出的自定义异常:
public ResponseEntity<?> deleteActor(@ApiParam(value = "Used to identify a single actor.", required = true) @PathVariable("actor_id") Integer actorId, @RequestHeader("Accept") String accept) throws Exception {
Actor actor = actorRepository.findOne(actorId);
if (actor == null) {
throw new NotFoundException(404, "Not found");
}
actorRepository.delete(actorId);
return new ResponseEntity<Void>(HttpStatus.NO_CONTENT);
}
我试过像这样抛出最常见的异常之一:
public ResponseEntity<?> readActor(@ApiParam(value = "Used to identify a single actor.", required = true) @PathVariable("actor_id") Integer actorId, @RequestHeader("Accept") String accept) throws Exception {
Actor actor = actorRepository.findOne(actorId);
if (actor == null) {
throw new NumberFormatException("");
}
return new ResponseEntity<Actor>(actor, HttpStatus.OK);
}
这些都得到了很好的处理...
tomcat 日志也显示了这一点:
2017-06-05 11:30:20.080 INFO 9076 --- [ main] .m.m.a.ExceptionHandlerExceptionResolver : Detected @ExceptionHandler methods in responseEntityExceptionHandler
异常:
public class NotFoundException extends ApiException {
private int code;
public NotFoundException (int code, String msg) {
super(code, msg);
this.code = code;
}
}
异常继承自这个基类:
public class ApiException extends Exception{
private int code;
public ApiException (int code, String msg) {
super(msg);
this.code = code;
}
}
关于自定义异常为何避免被 ExceptionHandler 检测到的任何想法?
如有必要,我很乐意提供更多信息。
最佳答案
对于这种特殊情况,答案是使用 Exception
而不是 RuntimeException
,因为 NotFoundException 仅继承自 Exception。
其他值得注意的事情:
要捕获所有异常,可以使用
@ExceptionHandler(Exception.class)
如果为异常使用通用名称,请始终检查您是否导入了正确的名称。
关于java - Spring Boot @ControllerAdvice 部分工作,不适用于自定义异常,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/44366096/