详细地介绍了Spring MVC中的异常处理。

Per Exception
 @ResponseStatus(value=HttpStatus.NOT_FOUND, reason="No such Order")
 public class OrderNotFoundException extends RuntimeException { }
Per Controller
@Controller
public class ExceptionHandlingController {
  @ResponseStatus(value=HttpStatus.CONFLICT,
                  reason="Data integrity violation")  // 409
  @ExceptionHandler(DataIntegrityViolationException.class)
  public void conflict() {
  
  }
}
Globally

可以用@ControllerAdvice和HandlerExceptionResolver。