java - Spring RestTemplate 处理异常

Question

我正在使用 Spring RestTemplate 发出 HTTP 请求

这是我的代码:

public static ResponseEntity<String> makeRequest() {
    ResponseEntity<String> response = null;
    try {
         RestTemplate restTemplate = new RestTemplate();
         response = restTemplate.exchange(URI, HttpMethod.GET, null, 
         String.class);

     }catch (HttpStatusCodeException e) {
         System.out.println(e.getStatusCode());
     }catch (Exception e) {
         e.printStackTrace();
     }
         return response;
}

如果服务器发出 400 响应，我会收到异常，并且我的方法返回 null 值。

有没有办法让 Spring RestTemplate 将 400 HTTP 代码视为 200 ？

Answer 1

用于单处错误处理使用。还包括导入语句

import org.springframework.http.client.ClientHttpResponse;
import org.springframework.http.client.SimpleClientHttpRequestFactory;
import org.springframework.web.client.RestTemplate;

RestTemplate restTemplate() {
    SimpleClientHttpRequestFactory clientHttpRequestFactory = new SimpleClientHttpRequestFactory();
    clientHttpRequestFactory.setConnectTimeout(2000);
    clientHttpRequestFactory.setReadTimeout(3000);
    RestTemplate restTemplate = new RestTemplate(clientHttpRequestFactory);
    restTemplate.setErrorHandler(new DefaultResponseErrorHandler() {
        @Override public boolean hasError(ClientHttpResponse response)
                throws IOException {
            try {
                //Do your stuff
                return super.hasError(response);
            } catch (Exception e) {
                logger.error("Exception [" + e.getMessage() + "] occurred while trying to send the request", e);
                return true;
            }
        }

        @Override public void handleError(ClientHttpResponse response)
                throws IOException {
            try {
                //Do your stuff
                super.handleError(response);
            } catch (Exception e) {
                logger.error("Exception [" + e.getMessage() + "] occurred while trying to send the request", e);
                throw e;
            }
        }
    });



    return restTemplate;
}