Question

将无效JSON发布到Spring Data REST（版本2.2.2）资源时，抛出HttpMessageNotReadableException并返回以下json：

{
    "cause": {
        "cause": {
            "cause": null,
            "message": "Illegal unquoted character ((CTRL-CHAR, code 10)): has to be escaped using backslash to be included in string value\n at [Source: org.apache.catalina.connector.CoyoteInputStream@646d9de6; line: 2, column: 20]"
        },
        "message": "Illegal unquoted character ((CTRL-CHAR, code 10)): has to be escaped using backslash to be included in string value\n at [Source: org.apache.catalina.connector.CoyoteInputStream@646d9de6; line: 2, column: 20] (through reference chain: gr.bytecode.exceptionhandling.domain.Book[\"name\"])"
    },
    "message": "Could not read JSON: Illegal unquoted character ((CTRL-CHAR, code 10)): has to be escaped using backslash to be included in string value\n at [Source: org.apache.catalina.connector.CoyoteInputStream@646d9de6; line: 2, column: 20] (through reference chain: gr.bytecode.exceptionhandling.domain.Book[\"name\"]); nested exception is com.fasterxml.jackson.databind.JsonMappingException: Illegal unquoted character ((CTRL-CHAR, code 10)): has to be escaped using backslash to be included in string value\n at [Source: org.apache.catalina.connector.CoyoteInputStream@646d9de6; line: 2, column: 20] (through reference chain: gr.bytecode.exceptionhandling.domain.Book[\"name\"])"
}

是否有一种明智的方式来覆盖此行为并返回自定义错误消息？

这是我迄今为止所做的尝试：

我为该异常添加了自定义@ExceptionHandler，但它永远不会被调用：

@ControllerAdvice
public class CustomResponseEntityExceptionHandler {

    @ExceptionHandler(HttpMessageNotReadableException.class)
    @ResponseStatus(value = HttpStatus.INTERNAL_SERVER_ERROR)
    protected ResponseEntity<Object> handleMethodArgumentNotValid(
            HttpMessageNotReadableException ex, HttpHeaders headers, HttpStatus status) {

        ErrorMessage errorMessage = new ErrorMessage("some error");
        return new ResponseEntity<Object>(errorMessage, headers, status);
    }
}

ErrorMessage是一个简单的POJO。

似乎第97行的Spring Data REST的AbstractRepositoryRestController定义了一个优先级高的方法：

@ExceptionHandler({ HttpMessageNotReadableException.class })
@ResponseBody
public ResponseEntity<ExceptionMessage> handleNotReadable(HttpMessageNotReadableException e) {
    return badRequest(e);
}

我也试图扩展ResponseEntityExceptionHandler，但同样地，也不建议。

使用：Spring Data REST 2.2.2和Spring Boot 1.2.2

TA

更新： Demo maven project available on github

Answer 1

处理此问题的一种方法是，使用'border-radius:1px'扩展CustomResponseEntityExceptionHandler，就像更改一次一样：

您可以调用ResponseEntityExceptionHandler提供的ResponseEntity方法，而不是返回handleExceptionInternal。此方法以及其他几个参数也采用body参数。可以使用自定义Error对象设置body参数。

例如：

ResponseEntityExceptionHandler

在Spring Data REST中为HttpMessageNotReadableException定制ExceptionHandler

1 个答案: