java调用外部接口

Java调用外部接口的方法，最终返回接口return的信息

        String strURL = "这里是你要调用的接口地址";
        URL url = new URL(strURL);
        HttpURLConnection httpConn = (HttpURLConnection)
                url.openConnection();
        httpConn.setRequestMethod("GET");
        httpConn.connect();

        BufferedReader reader = new BufferedReader(new InputStreamReader(
                httpConn.getInputStream()));
        String line;
        StringBuffer buffer = new StringBuffer();
        while ((line = reader.readLine()) != null) {
            buffer.append(line);
        }
        reader.close();
        httpConn.disconnect();

        System.out.println(buffer.toString());

最终这里buffer.toString();就是接口return的值