如何在Applet中获取客户端IP地址-蒲公英云

如何在Applet中获取客户端IP地址

您可以使用以下示例在Applet中获取客户端IP地址。该过程并非如此简单，您必须从加载Applet的位置获取当前主机和端口，并将其转换为Socket对象。

Socket socket = new Socket(getDocumentBase().getHost(), port);
ip = socket.getLocalAddress().getHostAddress();

在Applet中获取IP地址的示例

package com.mkyong.applet;
import java.applet.*;
import java.awt.Graphics;
import java.io.IOException;
import java.net.Socket;
public class AppletExample extends Applet {
    String ip;
    public void init() {
      try{
        int port;
        if(getDocumentBase().getPort()!=-1){
            port = getDocumentBase().getPort();
        }else{
            port = 80;
        }
            Socket socket = new Socket(getDocumentBase().getHost(), port);
        ip = socket.getLocalAddress().getHostAddress();
            }catch(IOException io){
        System.out.println(io.getMessage());
        }
    }
    public void paint( Graphics g ) {
       StringBuffer sb = new StringBuffer()
           .append(" IP address : ").append(ip);
       g.drawString(sb.toString(), 0,100);
    }
}