参考Q/A，通过在HttpInputStream上启用多次读取来记录其余模板的请求和响应

为什么我的自定义ClientHttpRequestInterceptor与空响应

我终于找到了正确的方法。 大部分的解决方案来自 我如何配置Spring和SLF4J以获得日志记录?

看来有两件事需要做:

在log4j中添加以下行。属性:log4j.logger.httpclient.wire=DEBUG 确保spring不会忽略您的日志配置

第二个问题主要发生在使用slf4j的spring环境中(就像我的例子一样)。 因此，当使用slf4j时，请确保发生以下两件事:

There is no commons-logging library in your classpath : this can be done by adding the exclusion descriptors in your pom : <exclusions><exclusion> <groupId>commons-logging</groupId> <artifactId>commons-logging</artifactId> </exclusion> </exclusions> The log4j.properties file is stored somewhere in the classpath where spring can find/see it. If you have problems with this, a last resort solution would be to put the log4j.properties file in the default package (not a good practice but just to see that things work as you expect)

我浏览了所有的答案，如果你需要设置认证类型或连接超时，那么你可以这样做:

SimpleClientHttpRequestFactory factory = new SimpleClientHttpRequestFactory();
factory.setConnectTimeout(Integer.valueOf(YOUR_VALUE));
factory.setReadTimeout(Integer.valueOf(YOUR_VALUE));

RestTemplate restTemplate = new RestTemplate(new BufferingClientHttpRequestFactory(factory));
restTemplate.getInterceptors().add(new LoggingRequestInterceptor());
restTemplate.getInterceptors().add(new BasicAuthenticationInterceptor(USER_NAME,PASSWORD,StandardCharsets.UTF_8));
return restTemplate;

除了上面的讨论，这只代表了快乐的场景。如果出现错误，您可能无法记录响应。

在这种情况下加上上面所有的情况，您必须重写DefaultResponseErrorHandler并像下面那样设置它

restTemplate.setErrorHandler(new DefaultResponseErrorHandlerImpl());

正如@MilacH指出的，在实现中有一个错误。如果返回statusCode > 400，则从拦截器抛出IOException，因为没有调用errorHandler。可以忽略异常，然后在处理程序方法中再次捕获异常。

package net.sprd.fulfillment.common;

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;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

import static java.nio.charset.StandardCharsets.UTF_8;

public class LoggingRequestInterceptor implements ClientHttpRequestInterceptor {

    final static Logger log = LoggerFactory.getLogger(LoggingRequestInterceptor.class);

    @SuppressWarnings("HardcodedLineSeparator")
    public static final char LINE_BREAK = '\n';

    @Override
    public ClientHttpResponse intercept(HttpRequest request, byte[] body, ClientHttpRequestExecution execution) throws IOException {
        try {
            traceRequest(request, body);
        } catch (Exception e) {
            log.warn("Exception in LoggingRequestInterceptor while tracing request", e);
        }

        ClientHttpResponse response = execution.execute(request, body);

        try {
            traceResponse(response);
        } catch (IOException e) {
            // ignore the exception here, as it will be handled by the error handler of the restTemplate
            log.warn("Exception in LoggingRequestInterceptor", e);
        }
        return response;
    }

    private void traceRequest(HttpRequest request, byte[] body) {
        log.info("===========================request begin================================================");
        log.info("URI         : {}", request.getURI());
        log.info("Method      : {}", request.getMethod());
        log.info("Headers     : {}", request.getHeaders());
        log.info("Request body: {}", new String(body, UTF_8));
        log.info("==========================request end================================================");
    }

    private void traceResponse(ClientHttpResponse response) throws IOException {
        StringBuilder inputStringBuilder = new StringBuilder();
        try (BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(response.getBody(), UTF_8))) {
            String line = bufferedReader.readLine();
            while (line != null) {
                inputStringBuilder.append(line);
                inputStringBuilder.append(LINE_BREAK);
                line = bufferedReader.readLine();
            }
        }

        log.info("============================response begin==========================================");
        log.info("Status code  : {}", response.getStatusCode());
        log.info("Status text  : {}", response.getStatusText());
        log.info("Headers      : {}", response.getHeaders());
        log.info("Response body: {}", inputStringBuilder);
        log.info("=======================response end=================================================");
    }

}

最好的方法是向应用程序添加loggging.level.org.springframework.web.client.resttemplate =DEBUG。属性文件。

其他解决方案，如设置log4j.logger.httpclient。wire不会总是工作，因为它们假设您使用log4j和Apache HttpClient，这并不总是正确的。

但是请注意，此语法仅适用于最新版本的Spring Boot。