Java获取网络主机信息

六月 24, 2009 | 标签 | 浏览
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Java获取网络主机信息


java.net.InetAddress类表示互联网协议 (IP) 地址。
有两个子类：Inet4Address, Inet6Address

通过 InetAddress可以方便获取一个域名下的IP，也可以获取一个IP的主机名。
下面是例子，通过程序查看51cto主机的IP信息，51cto是不让ping的。

代码:

import java.io.IOException;
import java.net.InetAddress;

public class TestInetAddress {
        public static void main(String[] args) throws IOException {
                test();
        }

        public static void test() throws IOException {
                //获取本机的IP地址
                InetAddress address1 = InetAddress.getLocalHost();
                System.out.println(address1.getHostAddress());
                System.out.println(address1.toString());

                System.out.println("---------------");
                //获取51cot的IP地址
                InetAddress address2 = InetAddress.getByName("www.51cto.com");
                System.out.println("getHostAddress:\t" + address2.getHostAddress());
                System.out.println("getHostName:\t" + address2.getHostName());
                System.out.println("---------------");
                //获取我博客的IP地址
                InetAddress address3 = InetAddress.getByName("lavasoft.blog.51cto.com");
                System.out.println("getHostAddress:\t" + address3.getHostAddress());
                System.out.println("getHostName:\t" + address3.getHostName());
                //直接用ip地址构建
                System.out.println(InetAddress.getByName("211.103.156.224"));

                System.out.println("---------------");
                //获取www.google.com域名下所有的IP地址
//                InetAddress[] address4 = InetAddress.getAllByName("www.microsoft.com");
                InetAddress[] address4 = InetAddress.getAllByName("www.google.com");
                for (InetAddress address : address4) {
//                                System.out.println(address.getHostAddress());
                        System.out.println(address);
                }

                InetAddress address5 = InetAddress.getByName("211.103.156.229");
                System.out.println(address5.isReachable(10));
        }
}

运行输出结果：


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