InetAddress类的使用示例

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InetAddress类的使用

package com.inetaddress;

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

import org.junit.Test;

/** * InetAddress类的使用 * 1. 获取InetAddress类的方式： * 1）getByName(String host)：通过主机（IP地址）获取（掌握） * 2）getLocalHost()：获取本机的InetAddress对象（IP地址为127.0.0.1/localhost） * 2. InetAddress类的方法使用： * 1）getHostAddress()：获取主机IP地址（掌握） * 2）getHostName()：获取主机名称（掌握） */
public class InetAddressTest { 
   
	@Test
	public void test2() { 
   
		try { 
   
			InetAddress inet = InetAddress.getByName("www.baidu.com");
			System.out.println(inet);
			
			String host = inet.getHostAddress();
			System.out.println(host);
			
			String name = inet.getHostName();
			System.out.println(name);
			
		} catch (UnknownHostException e) { 
   
			e.printStackTrace();
		}
	}	
	
	@Test
	public void test() throws Exception { 
   
		InetAddress addr1 = InetAddress.getByName("192.168.10.1");
		System.out.println(addr1);
		
		InetAddress addr2 = InetAddress.getByName("www.baidu.com");
		System.out.println(addr2);
		
		//InetAddress addr3 = InetAddress.getByName("127.0.0.1");
		InetAddress addr3 = InetAddress.getByName("localhost");
		System.out.println(addr3);
		
		InetAddress addr4 = InetAddress.getLocalHost();
		System.out.println(addr4);		
		
		/* // 下面两种不常用 byte[] addr = {89,57,21,7}; InetAddress addr2 = InetAddress.getByAddress(addr); System.out.println(addr2); //InetAddress addr3 = InetAddress.getByAddress("localhost", "127.0.0.1".getBytes()); //System.out.println(addr3); */
	}
}