java 域名转化ip java根据域名获取ip

package com.zhiru;

import .InetAddress;
import .UnknownHostException;

/*
 * 域名和ip地址获取
 * Java中用InetAddress类获取域名和ip地址.
 */
public class DNSAndIPAddress {
	public DNSAndIPAddress(){
		
	}
	//根据域名获取ip地址
	public static InetAddress getIP(String dns) throws UnknownHostException{
		return InetAddress.getByName(dns);
	}
	//根据ip地址获取域名
	public static InetAddress getDNS(String ip) throws UnknownHostException{
		return InetAddress.getByName(ip);
	}
	//获取本机的域名和ip地址
	public static String getHostAddress() throws UnknownHostException{
		return InetAddress.getLocalHost().toString();
	}
	public static void main(String[] args) throws UnknownHostException{
		System.out.println(getIP("www.upc.edu.cn").toString());
		System.out.println(getDNS("www.baidu.com").toString());
		System.out.println(getDNS("www.csdn.net").toString());
		System.out.println(getDNS("www.cnblogs.com").toString());
		System.out.println(getDNS("www.importnew.com").toString());
		System.out.println(getDNS("zhirublog.lingw.net").toString());
		//System.out.println(getDNS("blog.csdn.net/zhiruchen").toString());
		System.out.println(getHostAddress());
	}
}