本文介绍了一个Java程序，该程序能够根据不同操作系统（Windows和Linux）获取本机的IP地址。通过使用标准Java网络库，该程序提供了两个不同的方法来分别获取Windows和Linux系统的IP地址。
import java.net.InetAddress;
import java.net.UnknownHostException;
import java.util.Enumeration;
import java.net.Inet6Address;
import java.net.NetworkInterface;
import java.net.SocketException;
/* 获取IP
* */
public class GetNetworkCardIP {
/*获取本地win的IP*/
private static InetAddress getWinLocalIp() throws UnknownHostException{
InetAddress inet = InetAddress.getLocalHost();
// System.out.println("本机的ip=" + inet.getHostAddress());
return inet;
}
/*获取本地unix的IP*/
private static InetAddress getUnixLocalIp() throws SocketException{
InetAddress ia=null;
try {
Enumeration<?> e1 = (Enumeration<?>) NetworkInterface.getNetworkInterfaces();
while (e1.hasMoreElements()) {
NetworkInterface ni = (NetworkInterface) e1.nextElement();
if (!ni.getName().equals("eth0")) {
continue;
}
else {
Enumeration<?> e2 = ni.getInetAddresses();
while (e2.hasMoreElements()) {
ia = (InetAddress) e2.nextElement();
if (ia instanceof Inet6Address)
{
continue;
}
}
break;
}
}
} catch (SocketException e) {
e.printStackTrace();
System.exit(-1);
}
return ia;
}
/*判断是哪种系统然后获取当前IP*/
public static InetAddress getSystemLocalIP() throws UnknownHostException{
InetAddress inet=null;
String osname=new Getsysinfo().getSysName();
try {
//针对window系统
//if(osname.equalsIgnoreCase("Windows 7")){ 这里是只在"Windows 7"下获取IP
if(osname.startsWith("Windows")){ //这里是在所有Windows系统下下获取IP
inet=getWinLocalIp();
//针对linux系统
}else if(osname.equalsIgnoreCase("Linux")){
inet=getUnixLocalIp();
}
if(null==inet){
throw new UnknownHostException("主机的ip地址未知");
}
}catch (SocketException e) {
throw new UnknownHostException("获取本机ip错误"+e.getMessage());
}
return inet;
}
}
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