系统获取 IP 工具类

import java.net.Inet4Address;import java.net.InetAddress;import java.net.NetworkInterface;import java.net.SocketException;import java.util.ArrayList;import java.util.Arrays;import java.util.Collection;import java.util.Enumeration;import java.util.Iterator;import java.util.List;/** * 系统获取IP工具类 */public final class IPUtil {    /**     * 取到当前机器的IP地址，这里可以直接获取该服务器的所有网卡ip，如果包括内外网网卡，就是两个ip，中间以,分隔。     */    public static String getIp() {        String hostIp = null;        List
    
      ips = new ArrayList
     
      ();        Enumeration
      
        netInterfaces = null;        try {            netInterfaces = NetworkInterface.getNetworkInterfaces();            while (netInterfaces.hasMoreElements()) {                NetworkInterface netInterface = netInterfaces.nextElement();                Enumeration
       
         inteAddresses = netInterface.getInetAddresses();                while (inteAddresses.hasMoreElements()) {                    InetAddress inetAddress = inteAddresses.nextElement();                    if (!inetAddress.isLoopbackAddress() && inetAddress instanceof Inet4Address) {                        ips.add(inetAddress.getHostAddress());                    }                }            }        } catch (SocketException ex) {            ex.printStackTrace();        }        hostIp = collectionToDelimitedString(ips, ",");        return hostIp;    }    /**     * 集合转化为连接字符串     */    private static String collectionToDelimitedString(Collection
        
          coll, String delim) {        if (coll == null || coll.isEmpty()) {            return "";        }        StringBuilder sb = new StringBuilder();        Iterator
          it = coll.iterator();        while (it.hasNext()) {            sb.append(it.next());            if (it.hasNext()) {                sb.append(delim);            }        }        return sb.toString();    }    /**     * 获取服务器名称     */    public static String getHostName() {        String hostName = null;        try {            hostName = InetAddress.getLocalHost().getHostName();        } catch (Exception e) {            e.fillInStackTrace();        }        return hostName;    }    public static void main(String[] args) {        System.out.println(IPUtil.getIp());        System.out.println(IPUtil.getHostName());        String[] strArr = {"Google", "Baidu", "IBM", "Github", "Stackoverflow"};        List
         
           list = Arrays.asList(strArr); String result = collectionToDelimitedString(list, "、"); System.out.println(result); }}
         
        
       
      
     
    

运行结果

192.168.50.116DESKTOP-C6NCOA8Google、Baidu、IBM、Github、Stackoverflow