Java+Swing+Mysql学生成绩管理系统（DAY 6)

桌面系统托盘

package com.test;

import javax.swing.*;
import java.awt.*;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.net.URL;

public class LoginViewTest extends JFrame {

    JLabel titleNameLabel=new JLabel("学生成绩管理系统",JLabel.CENTER);

    SpringLayout spLayout=new SpringLayout();
    JPanel centerPanel=new JPanel(spLayout);

    JLabel userNameLabel=new JLabel("用户名：");
    JLabel userPwdLabel=new JLabel("登录密码：");

    JTextField nameTxd=new JTextField();
    JPasswordField pwdFiled=new  JPasswordField();

    JButton loginBtn=new JButton("登录");
    JButton resetBtn=new JButton("重置");

    //声明桌面系统托盘SystemTray
    SystemTray systemTray;
    TrayIcon trayIcon;

    public LoginViewTest(){

        super("学生成绩管理系统");

        //获取内容面板
        Container contentPane =getContentPane();
        //设置标题的字体，格式，大小
        titleNameLabel.setFont(new Font("华文行楷",Font.PLAIN,40));
        titleNameLabel.setPreferredSize(new Dimension(0,80));
        //设置中间各个组件的字体，大小，格式
        Font centerFont=new Font("华文行楷",Font.PLAIN,20);
        userNameLabel.setFont(centerFont);
        nameTxd.setPreferredSize(new Dimension(200,30));
        userPwdLabel.setFont(centerFont);
        pwdFiled.setPreferredSize(new Dimension(200,30));
        loginBtn.setFont(centerFont);
        resetBtn.setFont(centerFont);

        contentPane.setBackground(Color.pink);

        //把组件加入到面板上
        centerPanel.add(userNameLabel);
        centerPanel.add(userPwdLabel);
        centerPanel.add(nameTxd);
        centerPanel.add(pwdFiled);
        centerPanel.add(loginBtn);
        centerPanel.add(resetBtn);

        contentPane.add(titleNameLabel,BorderLayout.NORTH);
        contentPane.add(centerPanel,BorderLayout.CENTER);

        //获取组件的宽度Spring.width(组件名)用户名和用户名文本框组件
        Spring titleLabelWidth=Spring.width(userNameLabel);
        Spring titleTextWidth=Spring.width(nameTxd);
        Spring spaceWidth=Spring.constant(20);//userNameLabel和nameTxd的间距
        Spring totalWidth=Spring.sum(Spring.sum(titleLabelWidth,titleTextWidth),spaceWidth);
        int offSetX=totalWidth.getValue()/2;

         /*
        SpringLayout:布局管理器
        SpringLayout.Constraints:使用弹簧布局的容器里面的组件的布局约束，每个组件对应一个
        Spring:能够进行四则运算的整数
         */
        /*
        窗口相当于一个左顶角为原点的第四象限的坐标轴

         */
        //1.设置好用户名标签的位置（约束）
        SpringLayout.Constraints titleLabelCon=spLayout.getConstraints(userNameLabel);
        //用户名标签userNameLabel的西边参考centerPanel组件水平中心点方向左偏移offSetX的距离
        spLayout.putConstraint(SpringLayout.WEST,userNameLabel,-offSetX,SpringLayout.HORIZONTAL_CENTER,centerPanel);
        //设置用户名标签的垂直标签
        spLayout.putConstraint(SpringLayout.NORTH,userNameLabel,20,SpringLayout.NORTH,centerPanel);
        //or使用setY()设置垂直偏移量
        // titleLabelCon.setY(Spring.constant(50));//垂直偏移量

        //2.设置用户名文本框nameTxd的位置（约束）
        spLayout.putConstraint(SpringLayout.WEST,nameTxd,20,SpringLayout.EAST,userNameLabel);
        spLayout.putConstraint(SpringLayout.NORTH,nameTxd,0,SpringLayout.NORTH,userNameLabel);

        //3.设置密码标签userPwdLabel的位置
        spLayout.putConstraint(SpringLayout.NORTH,userPwdLabel,20,SpringLayout.SOUTH,userNameLabel);
        spLayout.putConstraint(SpringLayout.EAST,userPwdLabel,0,SpringLayout.EAST,userNameLabel);

        //4.设置密码文本框pwdFiled的位置（约束）
        spLayout.putConstraint(SpringLayout.WEST,pwdFiled,20,SpringLayout.EAST,userPwdLabel);
        spLayout.putConstraint(SpringLayout.NORTH,pwdFiled,0,SpringLayout.NORTH,userPwdLabel);

        //5.设置登录按钮loginBtn的位置
        spLayout.putConstraint(SpringLayout.EAST,loginBtn,-20,SpringLayout.HORIZONTAL_CENTER,centerPanel);
        spLayout.putConstraint(SpringLayout.NORTH,loginBtn,50,SpringLayout.SOUTH,pwdFiled);

        //6.设置重置按钮resetBtn的位置
        spLayout.putConstraint(SpringLayout.WEST,resetBtn,20,SpringLayout.HORIZONTAL_CENTER,centerPanel);
        spLayout.putConstraint(SpringLayout.NORTH,resetBtn,50,SpringLayout.SOUTH,pwdFiled);

        //判断当前系统是否支持系统托盘
        if(SystemTray.isSupported()){
            systemTray=SystemTray.getSystemTray();//初始化系统托盘
            URL imgUrl = LoginViewTest.class.getClassLoader().getResource("LoginView.jpg");
            trayIcon=new TrayIcon(new ImageIcon(imgUrl).getImage());//初始化托盘图标
            trayIcon.setImageAutoSize(true);//托盘图标可以自动缩放大小
            try {
                systemTray.add(trayIcon);//将托盘图标加入到系统托盘组件中，并抛出异常
            } catch (AWTException e) {
                e.printStackTrace();
            }
            //创建一个事件响应，最小化时销毁资源
            this.addWindowListener(new WindowAdapter() {
                @Override
                public void windowIconified(WindowEvent e) {
                    LoginViewTest.this.dispose();
                }
            });

            //托盘事件监听(鼠标单击一次托盘，窗口将会正常显示)
            trayIcon.addMouseListener(new MouseAdapter() {
                @Override
                public void mouseClicked(MouseEvent e) {
                    int clickCont=e.getClickCount();
                    if(clickCont==1){
                        LoginViewTest.this.setExtendedState(JFrame.NORMAL);
                    }
                    LoginViewTest.this.setVisible(true);
                }
            });
        }

        //设置窗口图片
        URL imgUrl=LoginViewTest.class.getClassLoader().getResource("LoginView.jpg");
        setIconImage(new ImageIcon(imgUrl).getImage());
        //设置窗口基本参数
        setSize(600,400);
        setDefaultCloseOperation(EXIT_ON_CLOSE);
        setLocationRelativeTo(null);
        setResizable(false);
        setVisible(true);
    }
    public static void main(String[] args){
        new LoginViewTest();
    }
}