驗證指定QQ用戶是否線上[JAVA版]

import java.io.IOException;02import java.net.HttpURLConnection;03import java.net.URL;04 05 06public class Qq{07 08    public static String qUrl = "QQ號碼";09    private static int state = 1243;10 11    public static void main(String[] args) {12         13        String urlQ = "http://wpa.qq.com/pa?p=2:"+qUrl+":41";14         15        try {16            URL url = new URL(urlQ);17            HttpURLConnection httpUrl = (HttpURLConnection) url.openConnection();18             19            if(state==httpUrl.getContentLength())20                System.out.println("QQ使用者：["+qUrl+"]狀態為線上");21            else22                System.out.println("QQ使用者：["+qUrl+"]狀態為離線/隱藏");23             24        }catch (IOException e) {25            System.out.println("串連此URL"+urlQ+"拋出異常資訊");26        }27    }28 29}