要为每个Controller自定义此消息，请在Controller中组合使用@ExceptionHandler和@ResponseStatus：

@ResponseStatus(value = HttpStatus.BAD_REQUEST, reason = "CUSTOM MESSAGE HERE")
    @ExceptionHandler(HttpMessageNotReadableException.class)
    public void handleException(HttpMessageNotReadableException ex) {
        //Handle Exception Here...
    }

如果您希望定义一次并全局处理这些Exceptions，则使用@ControllerAdvice类：

@ControllerAdvice
public class CustomControllerAdvice {
    @ResponseStatus(value = HttpStatus.BAD_REQUEST, reason = "CUSTOM MESSAGE HERE")
    @ExceptionHandler(HttpMessageNotReadableException.class)
    public void handleException(HttpMessageNotReadableException ex) {
        //Handle Exception Here...
    }
}

您还可以扩展ResponseEntityExceptionHandler并覆盖方法handleHttpMessageNotReadable（Kotlin中的示例，但在Java中非常相似）：

override fun handleHttpMessageNotReadable(ex: HttpMessageNotReadableException, headers: HttpHeaders, status: HttpStatus, request: WebRequest): ResponseEntity<Any> {
    val entity = ErrorResponse(status, ex.message ?: ex.localizedMessage, request)
    return this.handleExceptionInternal(ex, entity as Any?, headers, status, request)
}