java讀取 其他服務接口 返回的json數據

原文地址https://blog.csdn.net/fanxiangru999/article/details/70147981

現在開發大部分都是服務化或者微服務，數據交換都是跨服務的，這裏記錄java調取其他接口的方法，java代碼如下：

/**
 *
  *<p>類描述：接口讀取工具。</p>
 */
public class ReadUrlUtil {

      public static JSONObject readJsonFromUrl(String url) throws IOException, JSONException {
        InputStream is = new URL(url).openStream();
        try {
          BufferedReader rd = new BufferedReader(new InputStreamReader(is, Charset.forName("UTF-8")));
          StringBuilder sb = new StringBuilder();
          int cp;
          while ((cp = rd.read()) != -1) {
            sb.append((char) cp);
          }
          String jsonText = sb.toString();
          JSONObject json = JSONObject.fromObject(jsonText);
          return json;
        } finally {
          is.close();
        }
      }
}

測試代碼如下：

public static void main(String[] args) throws IOException, JSONException {
/          這裏調用百度的ip定位api服務 詳見 http://api.map.baidu.com/lbsapi/cloud/ip-location-api.htm
        String ip = "113.57.244.100";
        String url = "http://api.map.baidu.com/location/ip?ak=32f38c9491f2da9eb61106aaab1e9739&ip="+ip+"&coor=bd09ll";
        JSONObject json = ReadUrlUtil.readJsonFromUrl(url);
        System.out.println(json.toString());
        System.out.println("經度："+((JSONObject) json.get("content")).getJSONObject("point").get("x"));
        System.out.println("維度："+((JSONObject) json.get("content")).getJSONObject("point").get("y"));
        String city =(String) ((JSONObject) json.get("content")).getJSONObject("address_detail").get("city");
        city = city.replace("市","");

        System.out.println(city);

      }

測試結果如下圖：