public static void main(String[] args) {
  try {
    InetAddress address = InetAddress.getLocalHost();//獲取的是本地的IP地址 //PC-20140317PXKX/192.168.0.121
    String hostAddress = address.getHostAddress();//192.168.0.121
    InetAddress address1 = InetAddress.getByName("www.wodexiangce.cn");//獲取的是該網站的ip地址，比如我們所有的請求都通過nginx
 
的，所以這裡獲取到的其實是nginx伺服器的IP地
    String hostAddress1 = address1.getHostAddress();//124.237.121.122
    InetAddress[] addresses = InetAddress.getAllByName("www.baidu.com");//根據主機名返回其可能的所有InetAddress物件
    for(InetAddress addr:addresses){
      System.out.println(addr);//www.baidu.com/14.215.177.38
      //www.baidu.com/14.215.177.37
 
    }
    System.out.println(address+"\t-----");
    System.out.println(hostAddress+"\t*****");
    System.out.println(hostAddress1+"\t+++++++");
  } catch (UnknownHostException e) {
    e.printStackTrace();
  }
}