HttpMessageNotReadableException 的不明确的@ExceptionHandler 方法

Ambiguous @ExceptionHandler method for HttpMessageNotReadableException

在我的 @RestController 中,我成功地处理了来自 @RequestBody 的 JSONParse 异常(例如,一个 String 错误地输入了一个 Integer 字段)。这是代码:

@ResponseStatus(HttpStatus.BAD_REQUEST)
@ExceptionHandler({ HttpMessageNotReadableException.class })
public ValidationError handleException(HttpMessageNotReadableException ex) {
    if (ex.getCause() instanceof InvalidFormatException) {
        ...
    } else {
        throw ex;
    }
}

现在我想将其移动到 @ControllerAdvice 以供许多控制器使用。这是:

@Order(Ordered.HIGHEST_PRECEDENCE)
@ControllerAdvice
public class RestExceptionHandler extends ResponseEntityExceptionHandler {
    @ResponseStatus(HttpStatus.BAD_REQUEST)
    @ExceptionHandler({ HttpMessageNotReadableException.class })
    public ValidationError handleException(HttpMessageNotReadableException ex) {
        if (ex.getCause() instanceof InvalidFormatException) {
            ...
        } else {
            throw ex;
        }
    }

但是 Spring 抱怨如下: Ambiguous @ExceptionHandler method mapped for [class org.springframework.http.converter.HttpMessageNotReadableException]: {public Object foo.bar.RestExceptionHandler.handleException(org.springframework.http.converter.HttpMessageNotReadableException), public final org.springframework.http.ResponseEntity org.springframework.web.servlet.mvc.method.annotation.ResponseEntityExceptionHandler.handleException(java.lang.Exception,org.springframework.web.context.request.WebRequest) throws java.lang.Exception}

我无法覆盖 ResponseEntityExceptionHandler.handleException,因为它是最终版本。还有哪些其他选择?

使用 Spring 启动 2.4.3.

I can't override ResponseEntityExceptionHandler.handleException because it's final

您应该重写 protected ResponseEntity<Object> handleHttpMessageNotReadable(...) 方法来进行自定义错误处理。

您不应从 ResponseEntityExceptionHandler class 扩展。 检查这个答案