Java中如何,实现系统托盘功能.

示例图

项目包结构图

 

系统运行截图

应用核心逻辑说明,隐藏到托盘实质就是讲窗体隐藏.即setVisible(false),显示窗体即就是讲setVisible(true).

项目代码如下:
代码如下：

package org.pdp.frame;

 import java.awt.AWTException;
 import java.awt.MenuItem;
 import java.awt.PopupMenu;
 import java.awt.SystemTray;
 import java.awt.TrayIcon;
 import java.awt.event.ActionEvent;
 import java.awt.event.ActionListener;
 import java.net.URL;

 import javax.swing.ImageIcon;
 import javax.swing.JFrame;
 import javax.swing.JMenu;
 import javax.swing.JMenuBar;
 import javax.swing.JMenuItem;

 
 public class MainFrame extends JFrame implements ActionListener{

     private static final long serialVersionUID = -7078030311369039390L;
     private JMenu menu;
     private JMenuBar jmenuBar;
     private String [] jmItemName = {"置于托盘","系统退出"};

     public MainFrame(){
         super("电话薄");
         init();
         this.setSize(500,400);
         this.setJMenuBar(jmenuBar);
         this.setLocationRelativeTo(null);
         systemTray();    //系统托盘
     }

     /**
      * 初始化界面
      */
     public void init(){
         menu = new JMenu("系统窗体");
         for(int i=0; i<jmItemName.length; i++){
             JMenuItem menuItem = new JMenuItem(jmItemName[i]);
             menuItem.addActionListener(this);
             menu.add(menuItem);
         }
         this.jmenuBar = new JMenuBar();
         this.jmenuBar.add(menu);
     }

     @Override
     public void actionPerformed(ActionEvent e) {
         String actions = e.getActionCommand();
         if("置于托盘".equals(actions)){
             this.setVisible(false);
         }
         if("系统退出".equals(actions)){
             System.exit(0);
         }

     }

     /**系统托盘图标处理.*/
     private void  systemTray(){
         if(SystemTray.isSupported()){    //判断系统是否支持托盘功能.
             URL resource = this.getClass().getResource("systray.jpg");    //获得图片路径
             ImageIcon icon = new ImageIcon(resource); //创建图片对象
             PopupMenu popupMenu = new PopupMenu(); //创建弹出菜单对象
             MenuItem itemExit = new MenuItem("退出系统");    //创建弹出菜单中的退出项
             MenuItem itemShow = new MenuItem("显示窗体"); //创建弹出菜单中的显示主窗体项.
             itemExit.addActionListener(new ActionListener() {     //给退出像添加事件监听
                 @Override
                 public void actionPerformed(ActionEvent e) {
                     System.exit(0);
                 }           
             });
             itemShow.addActionListener(new ActionListener() { //给窗体最小化添加事件监听.
                 @Override
                 public void actionPerformed(ActionEvent e) {
                     setVisible(true);
                 }
             });
             popupMenu.add(itemExit);
             popupMenu.add(itemShow);
             TrayIcon trayIcon = new TrayIcon(icon.getImage(),"电话薄系统",popupMenu);
             SystemTray sysTray = SystemTray.getSystemTray();
             try {
                 sysTray.add(trayIcon);
             } catch (AWTException e1) {    }
         }
     }

     /**
      * 主方法
      * @param args
      */
     public static void main(String[] args) {

         new MainFrame().setVisible(true);

     }

 }