springboot中restTemplate请求时的异常处理以及编码格式

import org.springframework.boot.SpringApplication; import org.springframework.boot.autoconfigure.SpringBootApplication; import org.springframework.context.annotation.Bean; import org.springframework.http.converter.HttpMessageConverter; import org.springframework.http.converter.StringHttpMessageConverter; import org.springframework.web.client.RestTemplate;  import java.nio.charset.StandardCharsets; import java.util.List;  @SpringBootApplication public class TestApplication {     public static void main(String[] args) {         SpringApplication.run(TestApplication.class, args);     }      @Bean     public RestTemplate getRestTemplate() {         RestTemplate restTemplate = new RestTemplate();         //设置restTemplate的默认异常处理器为自定义的处理器         restTemplate.setErrorHandler(new CustomErrorHandler());         //修改restTemplate默认编码格式为UTF-8         List<HttpMessageConverter<?>> messageConverters = restTemplate.getMessageConverters();         for (int i = 0; i < messageConverters.size(); i++) {             HttpMessageConverter<?> messageConverter = messageConverters.get(i);             if (messageConverter.getClass().equals(StringHttpMessageConverter.class)) {                 messageConverters.set(i, new StringHttpMessageConverter(StandardCharsets.UTF_8));             }         }         return restTemplate;     } } 

自定义restTemplate异常处理器，需要实现ResponseErrorHandler 接口

import org.slf4j.Logger; import org.slf4j.LoggerFactory; import org.springframework.http.HttpMethod; import org.springframework.http.HttpStatus; import org.springframework.http.client.ClientHttpResponse; import org.springframework.web.client.ResponseErrorHandler;  import java.io.IOException; import java.net.URI;  public class CustomErrorHandler implements ResponseErrorHandler {      Logger logger = LoggerFactory.getLogger(this.getClass());      /**      * 表示 response 是否存在任何错误。实现类通常会检查 response 的 HttpStatus。      *      * @param response      * @return      * @throws IOException      */     @Override     public boolean hasError(ClientHttpResponse response) throws IOException {         int rawStatusCode = response.getRawStatusCode();         HttpStatus statusCode = HttpStatus.resolve(rawStatusCode);         return (statusCode != null ? statusCode.isError() : hasError(rawStatusCode));     }      protected boolean hasError(int unknownStatusCode) {         HttpStatus.Series series = HttpStatus.Series.resolve(unknownStatusCode);         return (series == HttpStatus.Series.CLIENT_ERROR || series == HttpStatus.Series.SERVER_ERROR);     }      /**      * 处理 response 中的错误, 当 hasError 返回 true 时才调用此方法。      * 当返回异常信息时自己想要做的一些操作处理      *      * @param response      * @throws IOException      */     @Override     public void handleError(ClientHttpResponse response) throws IOException {     }      /**      * 覆盖了上面的方法      * 处理 response 中的错误, 当 hasError 返回 true 时才调用此方法。      * 当返回异常信息时自己想要做的一些操作处理      *      * @param url      * @param method      * @param response      * @throws IOException      */     @Override     public void handleError(URI url, HttpMethod method, ClientHttpResponse response) throws IOException {         logger.error("=======================ERROR============================");         logger.error("HOST:{},URI：{}", url.getHost(), url.getPath());         logger.error("Method Type：{}", method.name());         logger.error("Exception：{}", response.getStatusCode());         logger.error("========================================================");     } }