java 实现关机工具，托盘图标

package com.gpengtao;

import java.awt.AWTException;
import java.awt.BorderLayout;
import java.awt.FlowLayout;
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.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.io.IOException;
import java.util.Calendar;

import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JDialog;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JTextField;

public class CloseComputer extends JFrame implements ActionListener {

/**
* @author gpengtao
*/
private static final long serialVersionUID = 1L;
private JButton countDown;
private JButton timeDown;
private JButton cancel;
private JLabel label;
private JPanel panelNorth;
private JPanel panelSouth;
private TrayIcon trayIcon;
private JFrame frame;

/**
* 构造方法 设置各种组建
*/
public CloseComputer() {
super("关机工具");
frame = this;
countDown = new JButton("倒计时关机");
timeDown = new JButton("定时关机");
cancel = new JButton("取消关机");
label = new JLabel("请选择关机方式");

panelNorth = new JPanel();
panelNorth.add(label);

panelSouth = new JPanel();
panelSouth.add(countDown);
panelSouth.add(timeDown);
panelSouth.add(cancel);

countDown.addActionListener(this);
timeDown.addActionListener(this);
cancel.addActionListener(this);

// ImageIcon(CloseComputer.class.getResource("/tray.png"));
ImageIcon titleIcon = new ImageIcon("tray.png");
this.setIconImage(titleIcon.getImage());
this.add(panelNorth, BorderLayout.NORTH);
this.add(panelSouth, BorderLayout.SOUTH);
this.setResizable(false);
this.setVisible(true);
this.setSize(380, 125);
this.setLocationRelativeTo(null);
this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

/**
* 设置可以最小化
*/
this.addWindowListener(new WindowAdapter() {
@Override
public void windowIconified(WindowEvent e) {
setVisible(false);
setExtendedState(JFrame.ICONIFIED);
dispose();
}
});

/**
* 设置托盘图标
*/
if (SystemTray.isSupported()) {
PopupMenu popupMenu = new PopupMenu();
MenuItem item1 = new MenuItem("exit");
MenuItem item2 = new MenuItem("open");
popupMenu.add(item1);
popupMenu.add(item2);
item1.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
System.exit(0);
}
});
item2.addActionListener(new ActionListener() {
@Override
public void actionPerformed(ActionEvent e) {
setVisible(true);
setExtendedState(JFrame.NORMAL);
}
});

// ImageIcon(CloseComputer.class.getResource("/tray.png"));
ImageIcon trayImg = new ImageIcon("tray.png");
trayIcon = new TrayIcon(trayImg.getImage(), "关机工具", popupMenu);
SystemTray sysTray = SystemTray.getSystemTray();
try {
sysTray.add(trayIcon);
} catch (AWTException e) {
e.printStackTrace();
}
trayIcon.addMouseListener(new MouseAdapter() {
@Override
public void mouseClicked(MouseEvent e) {
if (e.getClickCount() == 2) {
setVisible(true);
setExtendedState(JFrame.NORMAL);
}
}
});
}
}//构造函数

@Override
public void actionPerformed(ActionEvent e) {
if (e.getSource() == countDown) {
CountDown();
} else if (e.getSource() == timeDown) {
TimeDown();
} else if (e.getSource() == cancel) {
CancelDown();
}
}

/**
* 倒计时关机实现
*/
void CountDown() {
String time = JOptionPane.showInputDialog(this, "请输入倒计时时间 (秒)：", null);
try {
Runtime.getRuntime().exec("shutdown -s -t " + time);
} catch (IOException e) {
e.printStackTrace();
}
}

/**
* 定时关机实现
*/
void TimeDown() {
Dialog dialog = new Dialog(frame);
int hour = dialog.getHour();
int minute = dialog.getMinute();
int second = dialog.getSecond();
Calendar time = Calendar.getInstance();
int nowHour = time.get(Calendar.HOUR);
int nowMinute = time.get(Calendar.MINUTE);
int nowSecond = time.get(Calendar.SECOND);
int distance = hour * 60 * 60 + minute * 60 + second - nowHour * 60 * 60 - nowMinute * 60 - nowSecond;
if (distance < 0) {
JOptionPane.showMessageDialog(this, "时间输入有误  ╯﹏╰ ", "ERROR", JOptionPane.WARNING_MESSAGE);
return;
}
try {
Runtime.getRuntime().exec("shutdown -s -t " + distance);
} catch (IOException e) {
e.printStackTrace();
}
}

/**
* 取消关机实现
*/
void CancelDown() {
JOptionPane.showMessageDialog(this, "您已经取消关机任务！");
try {
Runtime.getRuntime().exec("shutdown -a");
} catch (IOException e) {
e.printStackTrace();
}
}

/**
* Dilog内部类
* @author gpengtao
* 定时关机时弹出的对话框，并获得数据
*/
class Dialog extends JDialog {
private static final long serialVersionUID = 1L;
private JTextField textHour;
private JTextField textMinute;
private JTextField textSecond;

public Dialog(JFrame frame) {
super(frame, "输入关机时间", true);

textHour = new JTextField(3);
textMinute = new JTextField(3);
textSecond = new JTextField(3);

this.setLayout(new FlowLayout());
this.add(textHour);
this.add(new JLabel("时"));
this.add(textMinute);
this.add(new JLabel("分"));
this.add(textSecond);
this.add(new JLabel("秒"));

this.setSize(300, 80);
this.setLocationRelativeTo(frame);
this.setVisible(true);

}

public int getHour() {
return Integer.parseInt(textHour.getText());
}

public int getMinute() {
return Integer.parseInt(textMinute.getText());
}

public int getSecond() {
return Integer.parseInt(textSecond.getText());
}
}//Dilog内部类

//自己的测试
public static void main(String[] args) {
new CloseComputer();
}

}