解决RestTemplate 401: org.springframework.web.client.HttpClientErrorException: 401 : [no body]

转载: https://blog.csdn.net/cc007cc009/article/details/110071142

将

    @Bean
    public RestTemplate restTemplate(RestTemplateBuilder builder) {
        RestTemplate restTemplate = builder.build();
        return restTemplate;
    }

改为

    @Bean
    public RestTemplate restTemplate(RestTemplateBuilder builder) {
        RestTemplate restTemplate = builder.build();
        restTemplate.setErrorHandler(new RtErrorHandler());
        return restTemplate;
    }

• RtErrorHandler 白名单上的异常则不处理，直接返回

• package cn.linksign.supervise.exception;
   
  import org.springframework.http.HttpStatus;
  import org.springframework.http.client.ClientHttpResponse;
  import org.springframework.web.client.DefaultResponseErrorHandler;
   
  import java.io.IOException;
  import java.util.ArrayList;
  import java.util.List;
   
  /**
   * 功能：捕获RestTemplate异常
   *
   */
  public class RtErrorHandler extends DefaultResponseErrorHandler {
   
      @Override
      public boolean hasError(ClientHttpResponse response) throws IOException {
          return super.hasError(response);
      }
   
      @Override
      public void handleError(ClientHttpResponse response) throws IOException {
          HttpStatus statusCode = HttpStatus.resolve(response.getRawStatusCode());
          List<HttpStatus> donotDeal = new ArrayList<>(); // 白名单
          donotDeal.add(HttpStatus.UNAUTHORIZED);
   
          if (!donotDeal.contains(statusCode)) { // 非白名单则处理
              super.handleError(response);
          }
      }
   
  }