When Java for http request, the session information to the header is placed inside

public class CreateHttpTest {

public static void main(String[] args) {

createHttp();
}
public static void createHttp() {

RestTemplate template = new RestTemplate();
ClientHttpRequestFactory clientFactory = new HttpComponentsClientHttpRequestFactory();
template.setRequestFactory(clientFactory);

String urlStr = "http://ip:port/app/api/depart/getUsers";

URI uri = UriComponentsBuilder.fromUriString(urlStr)
//.queryParam("sid", "42581a0dc0294e97ac8e3331875cfaaa")
.build().encode().toUri();

HttpHeaders requestHeaders = new HttpHeaders();
requestHeaders.set("Cookie", "sid=4c86eebfae6e4eef9e22b7caa6a4b684");
requestHeaders.setAccept(Arrays.asList(MediaType.APPLICATION_JSON_UTF8));
requestHeaders.setContentType(MediaType.APPLICATION_JSON_UTF8);
HttpEntity<String> requestEntity = new HttpEntity<String>("",requestHeaders);

ResponseEntity<String> responseEntity = template.exchange(uri, HttpMethod.GET,
requestEntity,String.class);

System.out.println ( "return information" + responseEntity.getBody ());
}


}