java获取ip地址与网络接口的方法示例

//获取本地主机对象
InetAddress host = InetAddress.getLocalHost();
//根据ip地址或主机名获取主机对象，以主机名获取主机时需要DNS解析
InetAddress host = InetAddress.getByName("192.168.100.124");
InetAddress host = InetAddress.getByName(www.baidu.com);

host.getHostAddress();
host.getHostName();

//返回数据类型为Enumeration
Enumeration<NetworkInterface> enu = NetworkInterface.getNetworkInterfaces();
while(enu.hasMoreElements){
 NetworkInterface inet = enu.nextElement();
 String intName = inet.getName();
}

Enumeration<InetAddress> net_list = inet.getInetAddresses();
while(net_list.hasMoreElements){
 InetAddress net = net_list.nextElement();
 String ip = net.getHostAddress();
}

import java.net.*;
import java.util.*;
public class EnumDemo {
 public static void main(String[] args) {
  try {
   //获取所有接口，并放进枚举集合中，然后使用Collections.list()将枚举集合转换为ArrayList集合
   Enumeration<NetworkInterface> enu = NetworkInterface.getNetworkInterfaces();
   ArrayList<NetworkInterface> arr = Collections.list(enu);
   for(Iterator<NetworkInterface> it = arr.iterator();it.hasNext();) {
    NetworkInterface ni = it.next();
    String intName = ni.getName(); //获取接口名
    //获取每个接口中的所有ip网络接口集合，因为可能有子接口
    ArrayList<InetAddress> inets = Collections.list(ni.getInetAddresses());
    for(Iterator<InetAddress> it1 = inets.iterator();it1.hasNext();) {
     InetAddress inet = it1.next();
     //只筛选ipv4地址，否则会同时得到Ipv6地址
     if(inet instanceof Inet4Address) {
      String ip = inet.getHostAddress();
      System.out.printf("%-10s %-5s %-6s %-15s\n", "InetfaceName:",intName,"| IPv4:",ip);
     }
    }
   }
  } catch (SocketException s) {
   s.printStackTrace();
  }
 }
}