java后台获取url java调用url接口

话不多说 上步骤

url = new URL("你的url");
//设置请求方式
HttpURLConnection connection = (HttpURLConnection) url.openConnection();
connection.setRequestMethod("GET");
connection.setRequestProperty("content-type", "application/json;charset=utf-8");
 //连接
 connection.connect();
  //输出
        String line;
        InputStream is = null;
        if (connection.getResponseCode() == status) {
            //解码gzip格式的json
            is = new GZIPInputStream(connection.getInputStream());

            BufferedReader reader = new BufferedReader(new InputStreamReader(is));
            StringBuilder sb=new StringBuilder();
            while ((line = reader.readLine()) != null) {
                sb.append(line);
            }
            weatherString=sb.toString();