一、導入的坐標(pom.xml文件)
<dependency>
<groupId>org.apache.httpcomponents</groupId>
<artifactId>httpclient</artifactId>
<version>4.5.6</version>
</dependency>
二、HttpUtils(封裝的HTTP工具類)
下面以json參數類型的post請求為例:
public static String jsonPost(String url,String params,boolean isToken) throws Exception{ //1、創建request(請求) HttpPost post = new HttpPost(url); //2、添加請求頭 post.setHeader(Constants.HEADER_NAME, Constants.HEADER_VALUE); //2.1判斷是否需要鑒權 if(isToken){ VariableUtils.getToken(post); } //3、添加入參 post.setEntity(new StringEntity(params, "UTF-8")); //4、發送接口 CloseableHttpClient client = HttpClients.createDefault(); //5、接收響應結果 CloseableHttpResponse response = client.execute(post); //6、格式化響應結果 HttpEntity entity = response.getEntity(); String body = EntityUtils.toString(entity); return body; }
調用的獲取鑒權函數(getToken())
public static void getToken(HttpRequest post){ //1、從map中獲取鑒權值 String token = env.get("access_token"); //2、判斷值不為空,則傳入到頭參數中 if(token != null){ post.setHeader("access_token",token); } }