仅为了完成示例
ClientHttpRequestInterceptor以跟踪请求和响应的完整实现，请执行以下操作：
import java.io.BufferedReader;import java.io.IOException;import java.io.InputStreamReader;import org.slf4j.Logger;import org.slf4j.LoggerFactory;import org.springframework.http.HttpRequest;import org.springframework.http.client.ClientHttpRequestExecution;import org.springframework.http.client.ClientHttpRequestInterceptor;import org.springframework.http.client.ClientHttpResponse;public class LoggingRequestInterceptor implements ClientHttpRequestInterceptor { final static Logger log = LoggerFactory.getLogger(LoggingRequestInterceptor.class); @Override public ClientHttpResponse intercept(HttpRequest request, byte[] body, ClientHttpRequestExecution execution) throws IOException { traceRequest(request, body); ClientHttpResponse response = execution.execute(request, body); traceResponse(response); return response; } private void traceRequest(HttpRequest request, byte[] body) throws IOException { log.info("===========================request begin================================================"); log.debug("URI : {}", request.getURI()); log.debug("Method : {}", request.getMethod()); log.debug("Headers : {}", request.getHeaders() ); log.debug("Request body: {}", new String(body, "UTF-8")); log.info("==========================request end================================================"); } private void traceResponse(ClientHttpResponse response) throws IOException { StringBuilder inputStringBuilder = new StringBuilder(); BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(response.getBody(), "UTF-8")); String line = bufferedReader.readLine(); while (line != null) { inputStringBuilder.append(line); inputStringBuilder.append('n'); line = bufferedReader.readLine(); } log.info("============================response begin=========================================="); log.debug("Status pre : {}", response.getStatusCode()); log.debug("Status text : {}", response.getStatusText()); log.debug("Headers : {}", response.getHeaders()); log.debug("Response body: {}", inputStringBuilder.toString()); log.info("=======================response end================================================="); }}然后
RestTemplate使用
BufferingClientHttpRequestFactory和实例化
LoggingRequestInterceptor：
RestTemplate restTemplate = new RestTemplate(new BufferingClientHttpRequestFactory(new SimpleClientHttpRequestFactory()));List<ClientHttpRequestInterceptor> interceptors = new ArrayList<>();interceptors.add(new LoggingRequestInterceptor());restTemplate.setInterceptors(interceptors);
BufferingClientHttpRequestFactory因为我们要在拦截器和初始调用代码中都使用响应主体，所以这是必需的。默认实现只允许读取一次响应主体。
