Java通过ip获取地址

public String getAddressByIP()
{ 
  try
  {
    String strIP = "0.0.0.0";
    URL url = new URL( "http://ip.qq.com/cgi-bin/searchip?searchip1=" + strIP); 
    URLConnection conn = url.openConnection(); 
    BufferedReader reader = new BufferedReader(new InputStreamReader(conn.getInputStream(), "GBK")); 
    String line = null; 
    StringBuffer result = new StringBuffer(); 
    while((line = reader.readLine()) != null)
    { 
      result.append(line); 
    } 
    reader.close(); 
    strIP = result.substring(result.indexOf( "该IP所在地为：" ));
    strIP = strIP.substring(strIP.indexOf( "：") + 1);
    String province = strIP.substring(6, strIP.indexOf("省"));
    String city = strIP.substring(strIP.indexOf("省") + 1, strIP.indexOf("市"));
    ... ...
    ... ...
  }
  catch( IOException e)
  { 
    return "读取失败"; 
  }
}