restTemplate 的用法

JSONObject json = new JSONObject();
json.put("mid", mid);
json.put("tid", tid);

 //調用普通接口
 HttpURLConnection httpURLConnection = null;
 BufferedReader ino = null;
 PrintWriter out = null;
 try {
 URL url = new URL(APIurl);
 httpURLConnection = (HttpURLConnection) url.openConnection();
 httpURLConnection.setRequestMethod("POST");
 httpURLConnection.setDoInput(true);
 httpURLConnection.setDoOutput(true);
 httpURLConnection.setRequestProperty("Content_Type","application/json");
 httpURLConnection.setRequestProperty("Accept_Charset","UTF-8");
 httpURLConnection.setRequestProperty("contentType","UTF-8");
 //發送POST請求參數
 out = new PrintWriter(httpURLConnection.getOutputStream());
// out = new OutputStreamWriter(httpURLConnection.getOutputStream(),"utf-8");
 out.write(strReqJsonStr);
// out.println(strReqJsonStr);
 out.flush();
 //讀取響應
 if (httpURLConnection.getResponseCode() == HttpURLConnection.HTTP_OK) {
 StringBuffer content = new StringBuffer();
 String tempStr = null;
 ino = new BufferedReader(new InputStreamReader(httpURLConnection.getInputStream()));
 while ((tempStr=ino.readLine()) != null){
 content.append(tempStr);
 }
 System.out.println("content:"+content.toString());
 //轉換成json對象
 JSONObject respJson = JSON.parseObject(content.toString());
 String resultCode = respJson.getString("errCode");
 if("SUCCESS".equals(resultCode)){
 //成功繼續走下面邏輯
 }else{

 //失敗
 }

 }
 return null;

 } catch (RestClientException e) {
 logger.error("調用銀商接口出現異常", e.toString() );
 return null;
 }

用RestTemplate 方法實現
private final RestTemplate restTemplate;

HttpHeaders httpHeaders = new HttpHeaders();
httpHeaders.add("Content-Type", "application/json;charset=UTF-8");
HttpEntity<String> httpEntity = new HttpEntity<>(JSON.toJSONString(paramsMap), httpHeaders);
ResponseEntity<String> response = restTemplate.exchange(APIurl, POST, httpEntity, String.class);
if (response.getStatusCode() == HttpStatus.OK) {
 JSONObject result = JSON.parseObject(response.getBody());
 if (result.getInteger("code") == 200) {

 }

}