(相關(guān)資料圖)

創(chuàng)建請求

創(chuàng)建請求頭：

Map requestBody = new HashMap<>();requestBody.put("userId", userId);requestBody.put("userName", userName);

創(chuàng)建請求體：

HttpHeaders requestHeader = new HttpHeaders();requestHeader.add("cookie", "cookie");requestHeader.add("userInfo", "{userId:101,userName:userName}");

創(chuàng)建請求方式：

HttpEntity> httpEntity = new HttpEntity<>(requestHeader);RestTemplate restTemplate = new RestTemplate();

POST請求

restTemplate發(fā)送POST請求時可以通過如下方法獲取ResponseEntity：

ResponseEntity responseEntity = restTemplate.postForEntity(url, httpEntity, JSONObject.class);

或用以下方法獲取jsonObject：

JSONObject jsonObject = restTemplate.postForObject(url, httpEntity, JSONObject.class);

GET請求

GET請求沒有相應的方法，只能用exchange方法獲取ResponseEntity：

ResponseEntity responseEntity = restTemplate.exchange(url, HttpMethod.GET, httpEntity, JSONObject.class, requestBody);

若出現(xiàn)如下報錯：

Not enough variables available to expand

則是因為RestTemplate認為大括號{}為占位符，需要將請求頭中的{userId:101,userName:userName}改為{\"userId\":\"101\",\"userName\":\"userName\"}