JAVA编写的IP地址动态切换软件

一共有4个类  MainApplet.java   ConfigFile.java   ExecCmd.java  SystemVars.java
下面是源代码：
1. MainApplet.java类
package com.zhangzhen.cmd;
 
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.FlowLayout;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.ComponentEvent;
import java.awt.event.ComponentListener;
import java.awt.event.KeyEvent;
import java.io.File;
import java.io.IOException;
import java.util.ArrayList;
import javax.swing.DefaultListModel;
import javax.swing.JApplet;
import javax.swing.JLabel;
import javax.swing.JList;
import javax.swing.JPanel;
import javax.swing.JButton;
import javax.swing.JScrollPane;
import javax.swing.JTextField;
import javax.swing.ListSelectionModel;
import javax.swing.event.ListSelectionEvent;
import javax.swing.event.ListSelectionListener;
public class MainApplet extends JApplet
{
 
   private JButton jbtSave = new JButton("Save");
   
   
   private JButton jbtDelete = new JButton("Delete");
   
   private JButton jbtOK = new JButton("OK");
   
   private JButton jbtAuto = new JButton("Auto");
   
   private JButton jbtExit = new JButton("Exit");
   
   
   private JLabel jlblIPAddress = new JLabel("IP地址：");
   
   private JTextField jtfIPAddress = new JTextField();
   
   private JLabel jlblSubnetMask = new JLabel("子网掩码: ");
   
   private JTextField jtfSubnetMask = new JTextField();
   
   private JLabel jlblGateway = new JLabel("默认网关：");
   
   private JTextField jtfGateway = new JTextField();
   
   private JLabel jlblDNSfirst = new JLabel("首选DNS服务器：");
   
   private JTextField jtfDNSfirst = new JTextField();
   
   private JLabel jlblDNSremark = new JLabel("备用DNS服务器：");
 
   private JTextField jtfDNSremark = new JTextField();
   
   
   private JLabel jlblConfigFileName = new JLabel("配置项名称：");
   
   private JTextField jtfConfgFileName = new JTextField();
   
   
   private JList jlConfigItem = new JList();
   
   
   DefaultListModel dlmConfigItem = new DefaultListModel();
   
   
   SystemVars configInfo = new SystemVars();
   
   
   
    public void init()
    {
     super.setSize(1000,500);
        setLayout(new BorderLayout());
       
        //添加控制按钮面板
     JPanel jpControl = new JPanel();
        jpControl.setLayout(new FlowLayout());
        // 设置按钮属性
        jbtSave.setMnemonic(KeyEvent.VK_S);
        jbtDelete.setMnemonic(KeyEvent.VK_DELETE);
        jbtOK.setMnemonic(KeyEvent.VK_O);
        jbtAuto.setMnemonic(KeyEvent.VK_A);
        jbtExit.setMnemonic(KeyEvent.VK_E);
        //添加控制按钮
        jpControl.add(jbtSave);
        jpControl.add(jbtDelete);
        jpControl.add(jbtOK);
        jpControl.add(jbtAuto);
        jpControl.add(jbtExit);
       
        add(jpControl,BorderLayout.SOUTH);
       
        //添加输入配置信息面板
        JPanel jpEnterConfigInfo = new JPanel();
        jpEnterConfigInfo.setLayout(new GridLayout(6,2,0,40));
       
        jpEnterConfigInfo.add(this.jlblIPAddress);
        jpEnterConfigInfo.add(this.jtfIPAddress);
        jpEnterConfigInfo.add(this.jlblSubnetMask);
        jpEnterConfigInfo.add(this.jtfSubnetMask);
        jpEnterConfigInfo.add(this.jlblGateway);
        jpEnterConfigInfo.add(this.jtfGateway);
        jpEnterConfigInfo.add(this.jlblDNSfirst);
        jpEnterConfigInfo.add(this.jtfDNSfirst);
        jpEnterConfigInfo.add(this.jlblDNSremark);
        jpEnterConfigInfo.add(this.jtfDNSremark);
       
        jpEnterConfigInfo.add(this.jlblConfigFileName);
        jpEnterConfigInfo.add(this.jtfConfgFileName);
       
        add(jpEnterConfigInfo,BorderLayout.EAST);
       
        //添加配置项列表框面板
        JPanel jpConfigItem = new JPanel();
        jpConfigItem.setLayout(new BorderLayout());
       
        //设置列表框属性
        jlConfigItem.setSelectionBackground(Color.gray);
        jlConfigItem.setSelectionForeground(Color.red);
        jlConfigItem.setVisibleRowCount(10);
        jlConfigItem.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
       
        jlConfigItem.setFixedCellHeight(30);
        jlConfigItem.setFixedCellWidth(200);
       
        jlConfigItem.setVisible(true);
       
       
       
       
        //添加配置项列表框
        jpConfigItem.add(jlConfigItem,BorderLayout.CENTER);
       
        add(new JScrollPane(jlConfigItem),BorderLayout.WEST);
       
       
       
        File configPath = new File("D:\IP_CONFIG");
        configPath.mkdir();
       
       
        this.jbtSave.addActionListener(new ActionListener()
        {

补充：软件开发 , Java ,

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