Java Spring Rest客户端异常处理
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Spring Rest Client Exception Handling
提问by Abhendra Singh
I am using spring RestTemplateto consume rest services(exposed in spring rest). I am able to consume success scenarios. But for negative scenarios, service returns error messages and error codes. I need to show those error messages in my web page.
我正在使用 springRestTemplate来消耗休息服务（在 spring 休息中暴露）。我能够使用成功场景。但对于负面情况，服务会返回错误消息和错误代码。我需要在我的网页中显示这些错误消息。
For e.g. for invalid request, service throws HttpStatus.BAD_REQUESTwith proper messages. If i put try-catch block it goes to catch block and I am not able to get ResponseEntityobject.
例如对于无效请求，服务会抛出HttpStatus.BAD_REQUEST正确的消息。如果我放置 try-catch 块，它会进入 catch 块，而我无法获取ResponseEntity对象。
try {
ResponseEntity<ResponseWrapper<MyEntity>> responseEntity = restTemplate.exchange(requestUrl, HttpMethod.POST, entity,
new ParameterizedTypeReference<ResponseWrapper<MyEntity>>() {
});
responseEntity.getStatusCode();
} catch (Exception e) {
//TODO How to get response here, so that i can get error messages?
e.printStackTrace();
}
How to get ResponseWrapperfor exception case?
如何获取ResponseWrapper异常情况？
I read about CustomRestTemplateand ResponseExtractorfrom herebut could not decide which one is best for my case.
我从这里阅读CustomRestTemplate并ResponseExtractor从这里开始，但无法决定哪一个最适合我的情况。
采纳答案by Abhendra Singh
I found solution. HttpClientErrorExceptionworked for me.
我找到了解决方案。HttpClientErrorException为我工作。
It has e.getResponseBodyAsString()function which returns ResponseBody.
它具有e.getResponseBodyAsString()返回 ResponseBody 的函数。
回答by phirzel
You might want to distinguish between:
您可能想区分：
HttpClientErrorException(HTTP-Status >=400) or HttpServerErrorException(HTTP-Status >= 500) or even RestClientException.
HttpClientErrorException(HTTP-Status >=400) 或HttpServerErrorException(HTTP-Status >=500) 甚至RestClientException.
Further on there is a good doc about defining your own ErrorHandler, see this link
进一步有关于定义自己的 ErrorHandler 的好文档，请参阅此链接
