java访问接口

private static String ajax(String strURL) throws IOException {
		// TODO Auto-generated method stub
		 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();
         return buffer.toString();
	}