1.先定義一個攔截器的類。

public class LoggingClientHttpRequestInterceptor implements ClientHttpRequestInterceptor {
    private final static Logger LOGGER = LoggerFactory.getLogger(LoggingClientHttpRequestInterceptor.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 {
        LOGGER.debug("===========================request begin================================================");
        LOGGER.debug("URI         : {}", request.getURI());
        LOGGER.debug("Method      : {}", request.getMethod());
        LOGGER.debug("Headers     : {}", request.getHeaders());
        LOGGER.debug("Request body: {}", new String(body, "UTF-8"));
        LOGGER.debug("==========================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('\n');
                line = bufferedReader.readLine();
            }
        }
        LOGGER.debug("============================response begin==========================================");
        LOGGER.debug("Status code  : {}", response.getStatusCode());
        LOGGER.debug("Status text  : {}", response.getStatusText());
        LOGGER.debug("Headers      : {}", response.getHeaders());
        LOGGER.debug("Response body: {}", inputStringBuilder.toString());//WARNING: comment out in production to improve performance
        LOGGER.debug("=======================response end=================================================");
    }
 
}
 

2.在RestTemplate定義類中加入該攔截器。

  @Bean
  public RestTemplate restTemplate() {
    RestTemplate restTemplate = new RestTemplate();
    restTemplate.getInterceptors().add(new LoggingClientHttpRequestInterceptor());
    return restTemplate;
  }

就可以了。