网络编程-获取ip-解析ip

import java.net.InetAddress;
import java.net.UnknownHostException;

/**
 * 查询ip地址
 *
 * @author chengluchao
 *
 */

public class AdderssTest {
    public static void main(String[] args) {
        selectLocal();
    }

    /**
     * 打印信息
     *
     * @param address
     */
    static void echoInetAddressInfo(InetAddress address) {
        System.out.println("全信息：   " + address);
        System.out.println("主机名：   " + address.getHostName());
        System.out.println("ip：      " + address.getHostAddress());
    }

    /**
     * 获取ip版本
     *
     * @param address
     */
    static void getVersion(InetAddress address) {
        byte[] ip = address.getAddress();
        if (ip.length == 4) {
            System.out.println("IPV4");
        } else if (ip.length == 16) {
            System.out.println("IPV6");
        } else {
            System.err.println("异常ip");
        }
    }

    /**
     * 根据域名查询ip
     */
    static void selectByName() {
        try {
            InetAddress address = InetAddress.getByName("www.baidu.com");
            echoInetAddressInfo(address);
        } catch (UnknownHostException e) {
            System.err.println("error");
        }
    }

    /**
     * 根据ip查询域名
     */
    static void selectByIp() {
        try {
            InetAddress[] addresss = InetAddress.getAllByName("220.181.111.188");
            int i = 1;
            for (InetAddress address : addresss) {
                System.out.println("第" + (i++) + "个");
                echoInetAddressInfo(address);
            }
        } catch (UnknownHostException e) {
            System.err.println("error");
        }
    }

    /**
     * 获取本地
     */
    static void selectLocal() {
        try {
            InetAddress address = InetAddress.getLocalHost();
            int i = 1;
            System.out.println("第" + (i++) + "个");
            echoInetAddressInfo(address);
            getVersion(address);
        } catch (UnknownHostException e) {
            System.err.println("error");
        }
    }

}