创立申请
创立申请头：
Map<String, String> requestBody = new HashMap<>();
requestBody.put("userId", userId);
requestBody.put("userName", userName);创立申请体：
HttpHeaders requestHeader = new HttpHeaders();
requestHeader.add("cookie", "cookie");
requestHeader.add("userInfo", "{userId:101,userName:userName}");创立申请形式：
HttpEntity<Map<String, String>> httpEntity = new HttpEntity<>(requestHeader);
RestTemplate restTemplate = new RestTemplate();POST 申请
restTemplate 发送 POST 申请时能够通过如下办法获取ResponseEntity：
ResponseEntity responseEntity = restTemplate.postForEntity(url, httpEntity, JSONObject.class);或用以下办法获取jsonObject：
JSONObject jsonObject = restTemplate.postForObject(url, httpEntity, JSONObject.class);GET 申请
GET 申请没有相应的办法，只能用 exchange 办法获取ResponseEntity：
ResponseEntity<JSONObject> responseEntity = restTemplate.exchange(url, HttpMethod.GET, httpEntity, JSONObject.class, requestBody);若呈现如下报错：
Not enough variables available to expand
则是因为 RestTemplate 认为大括号 {} 为占位符，须要将申请头中的 {userId:101,userName:userName} 改为{\"userId\":\"101\",\"userName\":\"userName\"}
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代码的路