package tool;

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

/**
 * @description
 * @author: 123.com
 * @create: 2019-01-17 17:34:52
 **/

public class GetIp {
    public static void getip() {
        try {
            InetAddress address = InetAddress.getLocalHost();//獲取的是本地的IP地址 //PC-20140317PXKX/192.168.0.121
            String hostAddress = address.getHostAddress();//192.168.0.121
            InetAddress address1 = InetAddress.getByName("www.wodexiangce.cn");//獲取的是該網站的ip地址，比如我們所有的請求都通過nginx的，所以這裏獲取到的其實是nginx服務器的IP地
            String hostAddress1 = address1.getHostAddress();//124.237.121.122
            InetAddress[] addresses = InetAddress.getAllByName("www.baidu.com");//根據主機名返回其可能的所有InetAddress對象
            for(InetAddress addr:addresses){
                System.out.println(addr);//www.baidu.com/14.215.177.38
                //www.baidu.com/14.215.177.37
            }
        } catch (Exception e){
            e.printStackTrace();
        }
    }

    public static void main(String[] args) {
        String serverIp = getServerIp();
        System.out.println(serverIp);
    }

    /**
     * 獲取服務器IP地址
     * @return
     */
    @SuppressWarnings("unchecked")
    public static String  getServerIp(){
        InetAddress addr = null;
        try {
            addr = InetAddress.getLocalHost();
        } catch (UnknownHostException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }

        byte[] ipAddr = addr.getAddress();
        String ipAddrStr = "";
        for (int i = 0; i < ipAddr.length; i++) {
            if (i > 0) {
                ipAddrStr += ".";
            }
            ipAddrStr += ipAddr[i] & 0xFF;
        }
        //System.out.println(ipAddrStr);
        return "局域網："+ipAddrStr;
    }
}
/***************************************************分割線******************************************************/
 

package tool;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

import java.net.URL;

public class Getip2 {
    public static String getWebIp() {
        try {

            //如果請求超時 ,請查看查詢本機IP網站 是否更換
            URL url = new URL("http://2018.ip138.com/ic.asp");

            BufferedReader br = new BufferedReader(new InputStreamReader(url.openStream()));

            String s = "";

            StringBuffer sb = new StringBuffer("");

            String webContent = "";


            while ((s = br.readLine()) != null) {
                sb.append(s + "\r\n");

            }

            br.close();
            webContent = sb.toString();
            int start = webContent.indexOf("[")+1;
            int end = webContent.indexOf("]");
            webContent = webContent.substring(start,end);
            return webContent;

        } catch (Exception e) {
            System.err.println("獲取IP發生錯誤");
            e.printStackTrace();
            return "error";

        }

    }

    public static void  main(String [] args) throws IOException {
        String ip = Getip2.getWebIp();
//        System.out.println(ip);
        String str ="";
        StringBuilder sb = new StringBuilder(ip);
        sb.replace(12,15,str);
        System.out.println("所屬外網:" + sb.toString());

        String serverIp = GetIp.getServerIp();
        System.out.println(serverIp);
    }

}
 

獲取本機的內外網ip