接口调用(发送http请求)

// 向对应的url地址发送http请求, 并获取响应的json字符串
   public String getHttpResponse(String url) {
       // result用于接收连接响应的数据
       String result = "";
       // in用于读取URL的响应
       BufferedReader in = null;
       try {
           URL realUrl = new URL(url);
           // 打开和URL之间的连接
           URLConnection connection = realUrl.openConnection();
           // 设置通用的请求属性
           connection.setRequestProperty("accept", "*/*");
           connection.setRequestProperty("connection", "Keep-Alive");
           connection.setRequestProperty("user-agent", "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)");
           // 建立实际的连接
           connection.connect();

           // 定义 BufferedReader输入流来读取URL的响应
           in = new BufferedReader(new InputStreamReader(connection.getInputStream(), "UTF-8"));
           String line;
           while ((line = in.readLine()) != null) {
               result += line;
           }
       } catch (MalformedURLException e) {
           e.printStackTrace();
       } catch (IOException e) {
           e.printStackTrace();
       } finally {
           try {
               if (in != null) {
                   in.close();
               }
           } catch (Exception e2) {
               e2.printStackTrace();
           }
       }

       // 通过http请求, 获取的响应数据
       return result;
   }

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接口调用(发送http请求)

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