Java网络编程示例-优快云博客

本文提供了一个Java网络编程示例，展示了如何使用InetAddress类获取本地主机和指定域名的IP地址，包括获取单个IP地址及同一域名下所有可用的IP地址的方法。

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package com.tianren.service;
import java.net.*;

import sun.security.krb5.internal.HostAddress;

public class Test{
InetAddress myIPaddress = null;
InetAddress myServer = null;
String hostAddress = null;
String hostName = null;
String Address = null ;
String Name = null ;
public static void main(String args[]) {

Test mytool;
mytool = new Test();
mytool.getAllServerIP();
// System.out.println("Your host IP is: " + mytool.getMyIP());
// System.out.println("The Server IP is :" + mytool.getServerIP());
}

// 取得LOCALHOST的IP地址
public String getMyIP() {
try {
   myIPaddress = InetAddress.getLocalHost();
   hostAddress = myIPaddress.getHostAddress();//仅仅获得IP地址
   hostName = myIPaddress.getHostName();//获得本地名称
} catch (UnknownHostException e) {
}
return (hostName);
}

// 取得 www.abc.com 的IP地址
public String getServerIP() {
try {
   myServer = InetAddress.getByName("www.abc.com");
   Address = myServer.getHostAddress();//获得www.abc.com的ip地址
   Name = myServer.getHostName();//获得域名
} catch (UnknownHostException e) {
}
return (Name);
}
//获取此域名下的所有IP
public void getAllServerIP(){
String name = "www.microsoft.com";
try{

   InetAddress[] addresses= InetAddress.getAllByName(name);
   for(int i =0;i<addresses.length;i++){
    System.out.println(addresses[i].getHostAddress());
   }
}catch(Exception e){
   System.err.println("Unable to find: "+name);

}
}

}