RestTemplate微服务调用捕捉服务端异常

1. restTemplate执行调用前，设置异常处理类

//1.执行调用前，设置异常处理类 restTemplate.setErrorHandler(newCustomResponseErrorHandler());

publicclassCustomResponseErrorHandlerimplementsResponseErrorHandler{private ResponseErrorHandler errorHandler=newDefaultResponseErrorHandler();@OverridepublicvoidhandleError(ClientHttpResponse response)throws IOException{// 对请求头的处理         List<String> customHeader= response.getHeaders().get("x-app-err-id");          String svcErrorMessageID="";if(customHeader!= null){             svcErrorMessageID= customHeader.get(0);}//对body 的处理 (inputStream)         String body=convertStreamToString(response.getBody());try{             errorHandler.handleError(response);}catch(RestClientException scx){thrownewCustomException(scx.getMessage(), scx, body);}}@OverridepublicbooleanhasError(ClientHttpResponse response)throws IOException{return errorHandler.hasError(response);}/**      * inputStream 装换为 string      */private StringconvertStreamToString(InputStream is){         BufferedReader reader=newBufferedReader(newInputStreamReader(is));         StringBuilder sb=newStringBuilder();          String line= null;try{while((line= reader.readLine())!= null){                 sb.append(line);}}catch(IOException e){             e.printStackTrace();}finally{try{                 is.close();}catch(IOException e){                 e.printStackTrace();}}return sb.toString();}}

2. 捕捉异常

//捕捉异常try{}catch(CustomException e){             JSONObject info= JSONObject.parseObject(e.getBody());             JSONObject meta= JSONObject.parseObject(info.get("meta").toString());             String message= meta.get("message").toString();             e.printStackTrace();             log.error(message, e);}

publicclassCustomExceptionextendsRestClientException{private RestClientException restClientException;private String body;public RestClientExceptiongetRestClientException(){return restClientException;}publicvoidsetRestClientException(RestClientException restClientException){this.restClientException= restClientException;}public StringgetBody(){return body;}publicvoidsetBody(String body){this.body= body;}publicCustomException(String msg, RestClientException restClientException, String body){super(msg);this.restClientException= restClientException;this.body= body;}}

代码网上整合而来的，具体链接忘了…