獲取服務器ip

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(); //192.168.85.7

        System.out.println("本地："+hostAddress);
        InetAddress address1 = InetAddress.getByName("my.oschina.net");//獲取的是該網站的ip地址，好比咱們全部的請求都經過nginx的，因此這裏獲取到的實際上是nginx服務器的IP地
        String hostAddress1 = address1.getHostAddress();//139.199.91.153
        System.out.println(hostAddress1);
        InetAddress[] addresses = InetAddress.getAllByName("www.baidu.com");//根據主機名返回其可能的全部InetAddress對象
        for(InetAddress addr:addresses){
            System.out.println(addr);//www.baidu.com/14.215.177.38
            //www.baidu.com/14.215.177.37
        }
    } catch (UnknownHostException e) {
        e.printStackTrace();
    }
}