JAVA模拟自动售货机

来源：互联网发布：dk智力训练手册淘宝编辑：程序博客网时间：2024/05/01 19:51
版本说明
2015-07-02 第一版。
2015-07-04 修复余额变更错误问题（变量使用错误造成），增加修改商品数量功能，调整视图结构，修改Unicode为中文，增加功能提示。
下面的代码为最新版本代码。
import java.awt.BorderLayout;import java.awt.Color;import java.awt.GridBagConstraints;import java.awt.GridBagLayout;import java.awt.Image;import java.awt.Insets;import java.awt.event.ActionEvent;import java.awt.event.ActionListener;import java.awt.event.MouseAdapter;import java.awt.event.MouseEvent;import java.awt.image.BufferedImage;import java.io.File;import java.io.IOException;import javax.imageio.ImageIO;import javax.swing.ImageIcon;import javax.swing.JButton;import javax.swing.JCheckBox;import javax.swing.JFrame;import javax.swing.JLabel;import javax.swing.JOptionPane;import javax.swing.JPanel;import javax.swing.JTextField;import javax.swing.SwingUtilities;import javax.swing.border.CompoundBorder;import javax.swing.border.LineBorder;import javax.swing.border.TitledBorder;import javax.swing.JTabbedPane;import java.awt.FlowLayout;/** * 自动售货机 功能说明： * <ol> * <li>点击图片或图片下方的购买复选框进行商品的选择或取消选择，商品数量小于等于0时无法选择；</li> * <li>点击“投入一元”或“投入五元”按钮模拟投入钱操作；</li> * <li>点击“购买”按钮完成购买，当投入钱数少于购买商品需要的钱数时购买不成功，当系统零钱不够找零时购买不成功；</li> * <li>点击“退款”按钮完成退款；</li> * <li>点击“查看”按钮可以查看所有商品的剩余数量，显示五秒后会关闭显示；</li> * <li>点击“登录”按钮弹出登录管理员需要的密码输入框，输入ADMIN后可以进入管理员页面，管理员页面分为修改余额和修改商品两个标签页，修改余额标签页可以查看系统总余额，系统一元数量和五元数量，同时可以手动更新一元和五元的数量，完成修改余额操作；修改商品标签页可以查看商品总数量和各个商品的分数量，同时可以手动修改每个商品的数量，完成修改商品数量操作。</li> * </ol> * <p> * <h4>注意在运行之前修改图片路径</h4> *  * @author th */public class AutoSaleMachine extends JFrame {    private static final long serialVersionUID = 6576104659382463412L;    private static final String ADMIN = "ADMIN"; // 管理员密码    // 初始化所有商品的名字    private static final String NAME_COKE = "可口可乐";    private static final String NAME_FANTA = "芬达";    private static final String NAME_RTEA = "红茶";    private static final String NAME_GTEA = "绿茶";    // 初始化所有商品的价格    private static final int PRICE_COKE = 3;    private static final int PRICE_FANTA = 2;    private static final int PRICE_RTEA = 4;    private static final int PRICE_GTEA = 5;    // 初始化所有商品的ID，没有多少用    private static final int ID_COKE = 1;    private static final int ID_FANTA = 2;    private static final int ID_RTEA = 3;    private static final int ID_GTEA = 4;    // 初始化所有商品数量    private static int COUNT_COKE = 10;    private static int COUNT_FANTA = 1;    private static int COUNT_RTEA = 30;    private static int COUNT_GTEA = 2;    private String img_coke = "photos/coke.jpg";    private String img_fanta = "photos/fanta.jpg";    private String img_rtea = "photos/rtea.jpg";    private String img_gtea = "photos/gtea.jpg";    private int cokeCount;    private int fantaCount;    private int rteaCount;    private int gteaCount;    private int userMoneySum; // 用户投入的钱数    private int userOneCount; // 用户一元计数    private int userFiveCount; // 用户五元计数    private int sysMoneySum; // 系统的总钱数    private int sysOneCount = 1; // 系统一元计数    private int sysFiveCount = 20; // 系统五元计数    private JTextField txt_UserMoney;    private JButton btn_UserFive;    private JButton btn_UserOne;    private GoodPanel gp_coke;    private GoodPanel gp_fanta;    private GoodPanel gp_rtea;    private GoodPanel gp_gtea;    private JButton btn_Show;    private JButton btn_Buy;    private JButton btn_Cancle;    private JButton btn_Admin;    private JPanel panel_Admin;    private JLabel lbl_SysMoneySum;    private JTextField txt_SysSum;    private JLabel lbl_SysOneSum;    private JTextField txt_SysOne;    private JLabel lbl_SysFiveSum;    private JTextField txt_SysFive;    private JButton btn_Save;    private JButton btn_Logout;    public AutoSaleMachine() {        setTitle("自动售货机");        GridBagLayout gridBagLayout = new GridBagLayout();        gridBagLayout.columnWidths = new int[] { 0, 0 };        gridBagLayout.rowHeights = new int[] { 0, 0, 0, 0 };        gridBagLayout.columnWeights = new double[] { 1.0, Double.MIN_VALUE };        gridBagLayout.rowWeights = new double[] { 1.0, 0.0, 0.0,                Double.MIN_VALUE };        getContentPane().setLayout(gridBagLayout);        JPanel panel_Good = new JPanel();        GridBagConstraints gbc_panel_Good = new GridBagConstraints();        gbc_panel_Good.insets = new Insets(0, 0, 5, 0);        gbc_panel_Good.fill = GridBagConstraints.BOTH;        gbc_panel_Good.gridx = 0;        gbc_panel_Good.gridy = 0;        getContentPane().add(panel_Good, gbc_panel_Good);        GridBagLayout gbl_panel_Good = new GridBagLayout();        gbl_panel_Good.columnWidths = new int[] { 230, 230, 0 };        gbl_panel_Good.rowHeights = new int[] { 0, 0, 0 };        gbl_panel_Good.columnWeights = new double[] { 0.5, 0.5,                Double.MIN_VALUE };        gbl_panel_Good.rowWeights = new double[] { 0.5, 0.5, Double.MIN_VALUE };        panel_Good.setLayout(gbl_panel_Good);        gp_coke = new GoodPanel(img_coke, PRICE_COKE, NAME_COKE, ID_COKE,                COUNT_COKE);        GridBagConstraints gbc_gp_coke = new GridBagConstraints();        gbc_gp_coke.insets = new Insets(5, 5, 5, 5);        gbc_gp_coke.fill = GridBagConstraints.BOTH;        gbc_gp_coke.gridx = 0;        gbc_gp_coke.gridy = 0;        panel_Good.add(gp_coke, gbc_gp_coke);        gp_fanta = new GoodPanel(img_fanta, PRICE_FANTA, NAME_FANTA, ID_FANTA,                COUNT_FANTA);        GridBagConstraints gbc_gp_fanta = new GridBagConstraints();        gbc_gp_fanta.insets = new Insets(5, 5, 5, 5);        gbc_gp_fanta.fill = GridBagConstraints.BOTH;        gbc_gp_fanta.gridx = 1;        gbc_gp_fanta.gridy = 0;        panel_Good.add(gp_fanta, gbc_gp_fanta);        gp_rtea = new GoodPanel(img_rtea, PRICE_RTEA, NAME_RTEA, ID_RTEA,                COUNT_RTEA);        GridBagConstraints gbc_gp_rtea = new GridBagConstraints();        gbc_gp_rtea.insets = new Insets(5, 5, 5, 5);        gbc_gp_rtea.fill = GridBagConstraints.BOTH;        gbc_gp_rtea.gridx = 0;        gbc_gp_rtea.gridy = 1;        panel_Good.add(gp_rtea, gbc_gp_rtea);        gp_gtea = new GoodPanel(img_gtea, PRICE_GTEA, NAME_GTEA, ID_GTEA,                COUNT_GTEA);        GridBagConstraints gbc_gp_gtea = new GridBagConstraints();        gbc_gp_gtea.insets = new Insets(5, 5, 5, 5);        gbc_gp_gtea.fill = GridBagConstraints.BOTH;        gbc_gp_gtea.gridx = 1;        gbc_gp_gtea.gridy = 1;        panel_Good.add(gp_gtea, gbc_gp_gtea);        JPanel panel_Btn = new JPanel();        GridBagConstraints gbc_panel_Btn = new GridBagConstraints();        gbc_panel_Btn.insets = new Insets(0, 0, 5, 0);        gbc_panel_Btn.fill = GridBagConstraints.HORIZONTAL;        gbc_panel_Btn.gridx = 0;        gbc_panel_Btn.gridy = 1;        getContentPane().add(panel_Btn, gbc_panel_Btn);        GridBagLayout gbl_panel_Btn = new GridBagLayout();        gbl_panel_Btn.columnWidths = new int[] { 0, 0, 0, 0, 0 };        gbl_panel_Btn.rowHeights = new int[] { 0, 0, 0 };        gbl_panel_Btn.columnWeights = new double[] { 0.25, 0.25, 0.25, 0.25,                Double.MIN_VALUE };        gbl_panel_Btn.rowWeights = new double[] { 0.0, 0.0, Double.MIN_VALUE };        panel_Btn.setLayout(gbl_panel_Btn);        JLabel lbl_UserMoney = new JLabel("投入金额（元）：");        GridBagConstraints gbc_lbl_UserMoney = new GridBagConstraints();        gbc_lbl_UserMoney.insets = new Insets(5, 5, 5, 5);        gbc_lbl_UserMoney.gridx = 0;        gbc_lbl_UserMoney.gridy = 0;        panel_Btn.add(lbl_UserMoney, gbc_lbl_UserMoney);        txt_UserMoney = new JTextField();        txt_UserMoney.setEditable(false);        GridBagConstraints gbc_txt_UserMoney = new GridBagConstraints();        gbc_txt_UserMoney.insets = new Insets(5, 0, 5, 5);        gbc_txt_UserMoney.fill = GridBagConstraints.HORIZONTAL;        gbc_txt_UserMoney.gridx = 1;        gbc_txt_UserMoney.gridy = 0;        panel_Btn.add(txt_UserMoney, gbc_txt_UserMoney);        txt_UserMoney.setColumns(10);        btn_UserOne = new JButton("投入一元");        GridBagConstraints gbc_btn_UserOne = new GridBagConstraints();        gbc_btn_UserOne.insets = new Insets(5, 0, 5, 5);        gbc_btn_UserOne.gridx = 2;        gbc_btn_UserOne.gridy = 0;        panel_Btn.add(btn_UserOne, gbc_btn_UserOne);        btn_UserOne.addActionListener(handler);        btn_Show = new JButton("查看");        btn_Show.setToolTipText("查看自动售货机中的商品数量，显示五秒后关闭");        GridBagConstraints gbc_btn_Show = new GridBagConstraints();        gbc_btn_Show.insets = new Insets(0, 0, 5, 5);        gbc_btn_Show.gridx = 0;        gbc_btn_Show.gridy = 1;        panel_Btn.add(btn_Show, gbc_btn_Show);        btn_Show.addActionListener(handler);        btn_Buy = new JButton("购买");        GridBagConstraints gbc_btn_Buy = new GridBagConstraints();        gbc_btn_Buy.insets = new Insets(0, 0, 5, 5);        gbc_btn_Buy.gridx = 1;        gbc_btn_Buy.gridy = 1;        panel_Btn.add(btn_Buy, gbc_btn_Buy);        btn_Buy.addActionListener(handler);        btn_UserFive = new JButton("投入五元");        GridBagConstraints gbc_btn_UserFive = new GridBagConstraints();        gbc_btn_UserFive.insets = new Insets(5, 0, 5, 0);        gbc_btn_UserFive.gridx = 3;        gbc_btn_UserFive.gridy = 0;        panel_Btn.add(btn_UserFive, gbc_btn_UserFive);        btn_UserFive.addActionListener(handler);        btn_Cancle = new JButton("取消");        GridBagConstraints gbc_btn_Cancle = new GridBagConstraints();        gbc_btn_Cancle.insets = new Insets(0, 0, 5, 5);        gbc_btn_Cancle.gridx = 2;        gbc_btn_Cancle.gridy = 1;        panel_Btn.add(btn_Cancle, gbc_btn_Cancle);        btn_Cancle.addActionListener(handler);        btn_Admin = new JButton("登录");        btn_Admin.setToolTipText("需要登录密码，登录后可以修改系统余额和商品数量。");        GridBagConstraints gbc_btn_Admin = new GridBagConstraints();        gbc_btn_Admin.insets = new Insets(0, 0, 5, 0);        gbc_btn_Admin.gridx = 3;        gbc_btn_Admin.gridy = 1;        panel_Btn.add(btn_Admin, gbc_btn_Admin);        btn_Admin.addActionListener(handler);        panel_Admin = new JPanel();        panel_Admin.setBorder(new TitledBorder(null, "管理员界面",                TitledBorder.LEADING, TitledBorder.TOP, null, null));        GridBagConstraints gbc_panel = new GridBagConstraints();        gbc_panel.fill = GridBagConstraints.BOTH;        gbc_panel.gridx = 0;        gbc_panel.gridy = 2;        getContentPane().add(panel_Admin, gbc_panel);        panel_Admin.setLayout(new BorderLayout(0, 0));        tabbedPane = new JTabbedPane(JTabbedPane.TOP);        panel_Admin.add(tabbedPane, BorderLayout.NORTH);        panel_AdminMoney = new JPanel();        tabbedPane.addTab("修改余额", null, panel_AdminMoney, null);        GridBagLayout gbl_panel_AdminMoney = new GridBagLayout();        gbl_panel_AdminMoney.columnWidths = new int[] { 0, 0, 0, 0, 0 };        gbl_panel_AdminMoney.rowHeights = new int[] { 0, 0, 0, 0 };        gbl_panel_AdminMoney.columnWeights = new double[] { 0.0, 0.5, 0.0, 0.5,                Double.MIN_VALUE };        gbl_panel_AdminMoney.rowWeights = new double[] { 0.0, 0.0, 0.0,                Double.MIN_VALUE };        panel_AdminMoney.setLayout(gbl_panel_AdminMoney);        lbl_SysMoneySum = new JLabel("系统总余额：");        GridBagConstraints gbc_lbl_SysMoneySum = new GridBagConstraints();        gbc_lbl_SysMoneySum.insets = new Insets(0, 0, 5, 5);        gbc_lbl_SysMoneySum.anchor = GridBagConstraints.EAST;        gbc_lbl_SysMoneySum.gridx = 0;        gbc_lbl_SysMoneySum.gridy = 0;        panel_AdminMoney.add(lbl_SysMoneySum, gbc_lbl_SysMoneySum);        txt_SysSum = new JTextField();        txt_SysSum.setEditable(false);        GridBagConstraints gbc_txt_SysSum = new GridBagConstraints();        gbc_txt_SysSum.insets = new Insets(0, 0, 5, 5);        gbc_txt_SysSum.fill = GridBagConstraints.HORIZONTAL;        gbc_txt_SysSum.gridx = 1;        gbc_txt_SysSum.gridy = 0;        panel_AdminMoney.add(txt_SysSum, gbc_txt_SysSum);        txt_SysSum.setColumns(10);        lbl_SysOneSum = new JLabel("系统一元数量：");        GridBagConstraints gbc_lbl_SysOneSum = new GridBagConstraints();        gbc_lbl_SysOneSum.anchor = GridBagConstraints.EAST;        gbc_lbl_SysOneSum.insets = new Insets(0, 5, 5, 5);        gbc_lbl_SysOneSum.gridx = 0;        gbc_lbl_SysOneSum.gridy = 1;        panel_AdminMoney.add(lbl_SysOneSum, gbc_lbl_SysOneSum);        txt_SysOne = new JTextField();        GridBagConstraints gbc_txt_SysOne = new GridBagConstraints();        gbc_txt_SysOne.insets = new Insets(0, 0, 5, 5);        gbc_txt_SysOne.fill = GridBagConstraints.HORIZONTAL;        gbc_txt_SysOne.gridx = 1;        gbc_txt_SysOne.gridy = 1;        txt_SysOne.setToolTipText("可以输入修改后的数量，点击保存按钮完成系统中一元数量的修改。");        panel_AdminMoney.add(txt_SysOne, gbc_txt_SysOne);        txt_SysOne.setColumns(10);        lbl_SysFiveSum = new JLabel("系统五元数量：");        GridBagConstraints gbc_lbl_SysFiveSum = new GridBagConstraints();        gbc_lbl_SysFiveSum.anchor = GridBagConstraints.EAST;        gbc_lbl_SysFiveSum.insets = new Insets(0, 5, 0, 5);        gbc_lbl_SysFiveSum.gridx = 0;        gbc_lbl_SysFiveSum.gridy = 2;        panel_AdminMoney.add(lbl_SysFiveSum, gbc_lbl_SysFiveSum);        txt_SysFive = new JTextField();        GridBagConstraints gbc_txt_SysFive = new GridBagConstraints();        gbc_txt_SysFive.insets = new Insets(0, 0, 0, 5);        gbc_txt_SysFive.fill = GridBagConstraints.HORIZONTAL;        gbc_txt_SysFive.gridx = 1;        gbc_txt_SysFive.gridy = 2;        txt_SysFive.setToolTipText("可以输入修改后的数量，点击保存按钮完成系统中一元数量的修改。");        panel_AdminMoney.add(txt_SysFive, gbc_txt_SysFive);        txt_SysFive.setColumns(10);        panel_AdminGood = new JPanel();        tabbedPane.addTab("\u4FEE\u6539\u5546\u54C1", null, panel_AdminGood,                null);        GridBagLayout gbl_panel_AdminGood = new GridBagLayout();        gbl_panel_AdminGood.columnWidths = new int[] { 0, 0, 0, 0, 0 };        gbl_panel_AdminGood.rowHeights = new int[] { 0, 0, 0, 0 };        gbl_panel_AdminGood.columnWeights = new double[] { 0.0, 0.5, 0.0, 0.5,                Double.MIN_VALUE };        gbl_panel_AdminGood.rowWeights = new double[] { 0.0, 0.0, 0.0,                Double.MIN_VALUE };        panel_AdminGood.setLayout(gbl_panel_AdminGood);        lbl_SysGood = new JLabel("系统总商品数量：");        GridBagConstraints gbc_lbl_SysGood = new GridBagConstraints();        gbc_lbl_SysGood.anchor = GridBagConstraints.EAST;        gbc_lbl_SysGood.insets = new Insets(0, 0, 5, 5);        gbc_lbl_SysGood.gridx = 0;        gbc_lbl_SysGood.gridy = 0;        panel_AdminGood.add(lbl_SysGood, gbc_lbl_SysGood);        txt_SysGood = new JTextField();        txt_SysGood.setEditable(false);        GridBagConstraints gbc_txt_SysGood = new GridBagConstraints();        gbc_txt_SysGood.insets = new Insets(0, 0, 5, 5);        gbc_txt_SysGood.fill = GridBagConstraints.HORIZONTAL;        gbc_txt_SysGood.gridx = 1;        gbc_txt_SysGood.gridy = 0;        panel_AdminGood.add(txt_SysGood, gbc_txt_SysGood);        txt_SysGood.setColumns(10);        lbl_SysCoke = new JLabel("可口可乐数量：");        GridBagConstraints gbc_lbl_SysCoke = new GridBagConstraints();        gbc_lbl_SysCoke.anchor = GridBagConstraints.EAST;        gbc_lbl_SysCoke.insets = new Insets(0, 5, 5, 0);        gbc_lbl_SysCoke.gridx = 0;        gbc_lbl_SysCoke.gridy = 1;        panel_AdminGood.add(lbl_SysCoke, gbc_lbl_SysCoke);        txt_CountCoke = new JTextField();        GridBagConstraints gbc_txt_CountCoke = new GridBagConstraints();        gbc_txt_CountCoke.insets = new Insets(0, 0, 5, 5);        gbc_txt_CountCoke.fill = GridBagConstraints.HORIZONTAL;        gbc_txt_CountCoke.gridx = 1;        gbc_txt_CountCoke.gridy = 1;        panel_AdminGood.add(txt_CountCoke, gbc_txt_CountCoke);        txt_CountCoke.setColumns(10);        txt_CountCoke.setToolTipText("可以输入修改后的数量，点击保存按钮完成系统中可口可乐数量的修改。");        lbl_SysFanta = new JLabel("芬达数量：");        GridBagConstraints gbc_lbl_SysFanta = new GridBagConstraints();        gbc_lbl_SysFanta.anchor = GridBagConstraints.EAST;        gbc_lbl_SysFanta.insets = new Insets(0, 5, 5, 0);        gbc_lbl_SysFanta.gridx = 2;        gbc_lbl_SysFanta.gridy = 1;        panel_AdminGood.add(lbl_SysFanta, gbc_lbl_SysFanta);        txt_CountFanta = new JTextField();        GridBagConstraints gbc_txt_CountFanta = new GridBagConstraints();        gbc_txt_CountFanta.insets = new Insets(0, 0, 5, 0);        gbc_txt_CountFanta.fill = GridBagConstraints.HORIZONTAL;        gbc_txt_CountFanta.gridx = 3;        gbc_txt_CountFanta.gridy = 1;        panel_AdminGood.add(txt_CountFanta, gbc_txt_CountFanta);        txt_CountFanta.setColumns(10);        txt_CountFanta.setToolTipText("可以输入修改后的数量，点击保存按钮完成系统中芬达数量的修改。");        lbl_SysRtea = new JLabel("红茶数量：");        GridBagConstraints gbc_lbl_SysRtea = new GridBagConstraints();        gbc_lbl_SysRtea.anchor = GridBagConstraints.EAST;        gbc_lbl_SysRtea.insets = new Insets(0, 5, 5, 0);        gbc_lbl_SysRtea.gridx = 0;        gbc_lbl_SysRtea.gridy = 2;        panel_AdminGood.add(lbl_SysRtea, gbc_lbl_SysRtea);        txt_CountRtea = new JTextField();        GridBagConstraints gbc_txt_CountRtea = new GridBagConstraints();        gbc_txt_CountRtea.insets = new Insets(0, 0, 5, 5);        gbc_txt_CountRtea.fill = GridBagConstraints.HORIZONTAL;        gbc_txt_CountRtea.gridx = 1;        gbc_txt_CountRtea.gridy = 2;        panel_AdminGood.add(txt_CountRtea, gbc_txt_CountRtea);        txt_CountRtea.setColumns(10);        txt_CountRtea.setToolTipText("可以输入修改后的数量，点击保存按钮完成系统中红茶数量的修改。");        lbl_SysGtea = new JLabel("绿茶数量：");        GridBagConstraints gbc_lbl_SysGtea = new GridBagConstraints();        gbc_lbl_SysGtea.anchor = GridBagConstraints.EAST;        gbc_lbl_SysGtea.insets = new Insets(0, 5, 5, 0);        gbc_lbl_SysGtea.gridx = 2;        gbc_lbl_SysGtea.gridy = 2;        panel_AdminGood.add(lbl_SysGtea, gbc_lbl_SysGtea);        txt_CountGtea = new JTextField();        GridBagConstraints gbc_txt_CountGtea = new GridBagConstraints();        gbc_txt_CountGtea.insets = new Insets(0, 0, 5, 0);        gbc_txt_CountGtea.fill = GridBagConstraints.HORIZONTAL;        gbc_txt_CountGtea.gridx = 3;        gbc_txt_CountGtea.gridy = 2;        panel_AdminGood.add(txt_CountGtea, gbc_txt_CountGtea);        txt_CountGtea.setColumns(10);        txt_CountGtea.setToolTipText("可以输入修改后的数量，点击保存按钮完成系统中绿茶数量的修改。");        panel_BtnAdmin = new JPanel();        FlowLayout fl_panel_BtnAdmin = (FlowLayout) panel_BtnAdmin.getLayout();        fl_panel_BtnAdmin.setHgap(35);        btn_Save = new JButton("保存");        panel_BtnAdmin.add(btn_Save);        btn_Save.addActionListener(handler);        btn_Logout = new JButton("退出");        panel_BtnAdmin.add(btn_Logout);        panel_Admin.add(panel_BtnAdmin, BorderLayout.SOUTH);        btn_Logout.addActionListener(handler);        panel_Admin.setVisible(false);    }    /**     * 响应按钮事件     */    private ActionListener handler = new ActionListener() {        @Override        public void actionPerformed(ActionEvent e) {            if (e.getSource() == btn_UserOne) {                userOneCount++;                updateUserMoney();            } else if (e.getSource() == btn_UserFive) {                userFiveCount++;                updateUserMoney();            } else if (e.getSource() == btn_Buy) {                // 购买                // 获取购买的商品总价，如果总价大于输入的钱数，提示用户继续投入钱                int needSum = getGoodSum();                if (needSum == 0) {                    JOptionPane.showMessageDialog(null,                            "购买失败，您没有选择任何商品，请选择需要的商品。");                    return;                } else if (needSum > userMoneySum) {                    JOptionPane.showMessageDialog(null, "投入的金额小于需要购买商品的总价，请再投入"                            + (needSum - userMoneySum) + "元或取消一些商品。");                    reinitGoodCount();                    return;                } else {                    // 计算需要找零的钱数                    int remain = userMoneySum - needSum;                    int remainFiveCount = remain / 5;                    int remainOneCount = remain % 5;                    // 修改系统钱数和计数                    int sysRemain = sysOneCount + userOneCount - remainOneCount;                    if (sysRemain < 0) {                        JOptionPane.showMessageDialog(null,                                "抱歉，系统中没有足够的零钱，请修改够买商品或退款后使用零钱购买。");                        return;                    }                    sysOneCount = sysRemain;                    sysFiveCount = sysFiveCount + userFiveCount                            - remainFiveCount;                    sysMoneySum = sysOneCount + sysFiveCount * 5;                    // 修改商品的总数                    updateGoodCount();                    // 输出购买的商品和找零的钱数                    String result = getBuyResult(remain);                    JOptionPane.showMessageDialog(null, result);                    // 设置初始状态                    reinit();                    pnlAdminUpdate();                }            } else if (e.getSource() == btn_Cancle) {                // 退款                updateUserMoney();                if (userMoneySum > 0) {                    String remainResult = getRemianResult();                    JOptionPane.showMessageDialog(null, remainResult);                    reinit();                } else {                    JOptionPane.showMessageDialog(null, "您投入的钱数为0，无法进行退款操作。");                }            } else if (e.getSource() == btn_Show) {                // 显示剩余商品数目                showGoodCount();            } else if (e.getSource() == btn_Admin) {                String input = JOptionPane.showInputDialog("请输入管理员密码，区分大小写。");                if (ADMIN.equals(input)) {                    // 登录成功，显示管理员面板                    pnlAdminUpdate();                    panel_Admin.setVisible(true);                    repaint();                } else {                    JOptionPane.showMessageDialog(null, "您输入的密码错误，无法进入管理员页面。");                }            } else if (e.getSource() == btn_Save) {                String oneStr = txt_SysOne.getText();                int one = Integer.parseInt(oneStr);                String fiveStr = txt_SysFive.getText();                int five = Integer.parseInt(fiveStr);                sysOneCount = one;                sysFiveCount = five;                sysMoneySum = sysOneCount + sysFiveCount * 5;                txt_SysSum.setText(sysMoneySum + "");                String cokeStr = txt_CountCoke.getText();                COUNT_COKE = Integer.parseInt(cokeStr);                String fantaStr = txt_CountFanta.getText();                COUNT_FANTA = Integer.parseInt(fantaStr);                String rteaStr = txt_CountRtea.getText();                COUNT_RTEA = Integer.parseInt(rteaStr);                String gteaStr = txt_CountGtea.getText();                COUNT_GTEA = Integer.parseInt(gteaStr);                int sysGoodSum = COUNT_COKE + COUNT_FANTA + COUNT_RTEA                        + COUNT_GTEA;                pnlAdminUpdate();                JOptionPane.showMessageDialog(null, "修改成功，系统中的总余额为："                        + sysMoneySum + "元；总商品数量为：" + sysGoodSum + "。");            } else if (e.getSource() == btn_Logout) {                panel_Admin.setVisible(false);                repaint();            }        }    };    private JLabel lbl_SysGood;    private JTextField txt_SysGood;    private JLabel lbl_SysCoke;    private JTextField txt_CountCoke;    private JLabel lbl_SysFanta;    private JTextField txt_CountFanta;    private JLabel lbl_SysRtea;    private JTextField txt_CountRtea;    private JLabel lbl_SysGtea;    private JTextField txt_CountGtea;    private JTabbedPane tabbedPane;    private JPanel panel_AdminMoney;    private JPanel panel_AdminGood;    private JPanel panel_BtnAdmin;    /**     * 更新管理员面板信息     */    private void pnlAdminUpdate() {        txt_SysOne.setText(sysOneCount + "");        txt_SysFive.setText(sysFiveCount + "");        txt_SysSum.setText((sysOneCount + sysFiveCount * 5) + "");        txt_CountCoke.setText(COUNT_COKE + "");        txt_CountFanta.setText(COUNT_FANTA + "");        txt_CountRtea.setText(COUNT_RTEA + "");        txt_CountGtea.setText(COUNT_GTEA + "");        txt_SysGood                .setText((COUNT_COKE + COUNT_FANTA + COUNT_RTEA + COUNT_GTEA)                        + "");        gp_coke.setGoodCount(COUNT_COKE);        gp_fanta.setGoodCount(COUNT_FANTA);        gp_rtea.setGoodCount(COUNT_RTEA);        gp_gtea.setGoodCount(COUNT_GTEA);    }    /**     * 显示商品数量     */    protected void showGoodCount() {        gp_coke.showRemain();        gp_fanta.showRemain();        gp_rtea.showRemain();        gp_gtea.showRemain();    }    /**     * 获取退款结果     *      * @return     */    protected String getRemianResult() {        StringBuffer sb = new StringBuffer();        sb.append("退款成功。您取回");        if (userOneCount > 0) {            sb.append(userOneCount).append("个一元硬币；");        }        if (userFiveCount > 0) {            sb.append(userFiveCount).append("张五元纸币；");        }        return sb.toString();    }    /**     * 获取购买的商品描述     *      * @param remain     * @return     */    protected String getBuyResult(int remain) {        StringBuffer sb = new StringBuffer();        sb.append("购买成功。您购买了");        if (cokeCount > 0) {            sb.append(cokeCount).append("瓶").append(NAME_COKE).append("；");        }        if (fantaCount > 0) {            sb.append(fantaCount).append("瓶").append(NAME_FANTA).append("；");        }        if (rteaCount > 0) {            sb.append(rteaCount).append("瓶").append(NAME_RTEA).append("；");        }        if (gteaCount > 0) {            sb.append(gteaCount).append("瓶").append(NAME_GTEA).append("；");        }        if (remain >= 0) {            sb.append("并找您" + remain + "元。");        }        return sb.toString();    }    /**     * 更新商品数量     */    protected void updateGoodCount() {        if (cokeCount > 0) {            COUNT_COKE -= cokeCount;            gp_coke.setGoodCount(COUNT_COKE);            gp_coke.reInit();        }        if (fantaCount > 0) {            COUNT_FANTA -= fantaCount;            gp_fanta.setGoodCount(COUNT_FANTA);            gp_fanta.reInit();        }        if (rteaCount > 0) {            COUNT_RTEA -= rteaCount;            gp_rtea.setGoodCount(COUNT_RTEA);            gp_rtea.reInit();        }        if (gteaCount > 0) {            COUNT_GTEA -= gteaCount;            gp_gtea.setGoodCount(COUNT_GTEA);            gp_gtea.reInit();        }    }    /**     * 设置商品选中数为0，并初始化投入钱数等于0；     */    protected void reinit() {        reinitGoodCount();        userOneCount = 0;        userFiveCount = 0;        userMoneySum = 0;        txt_UserMoney.setText(0 + "");    }    /**     * 重新设置商品的选择数量为0     */    protected void reinitGoodCount() {        cokeCount = 0;        fantaCount = 0;        rteaCount = 0;        gteaCount = 0;    }    /**     * 获取购买商品需要的总钱数     *      * @return     */    protected int getGoodSum() {        int sum = 0;        if (gp_coke.isSelected()) {            cokeCount++;            sum += cokeCount * PRICE_COKE;        }        if (gp_fanta.isSelected()) {            fantaCount++;            sum += fantaCount * PRICE_FANTA;        }        if (gp_rtea.isSelected()) {            rteaCount++;            sum += rteaCount * PRICE_RTEA;        }        if (gp_gtea.isSelected()) {            gteaCount++;            sum += gteaCount * PRICE_GTEA;        }        return sum;    }    /**     * 更新用户投入的钱数     */    protected void updateUserMoney() {        userMoneySum = (userOneCount + userFiveCount * 5);        txt_UserMoney.setText(userMoneySum + "");    }    public static void main(String[] args) {        SwingUtilities.invokeLater(new Runnable() {            @Override            public void run() {                AutoSaleMachine asm = new AutoSaleMachine();                asm.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);                asm.setSize(500, 600);                asm.setResizable(false);                asm.setLocationRelativeTo(null);                asm.setVisible(true);            }        });    }}/** * @author th 商品面板，包含商品的图片和名称，以及是否选中的复选框 */class GoodPanel extends JPanel {    /**     *      */    private static final long serialVersionUID = 4364216395712746083L;    private static final String MONEY_UNIT = "元";    private static final String TIP = "单击图片可以选择购买或者取消购买";    private String picPath;    private String name;    private JTextField txt_Price;    private int price;    private JLabel lbl_Pic;    private JCheckBox cbox_Select;    private int goodId;    private int goodCount;    private JLabel lbl_Remain;    private JTextField txt_Remain;    GoodPanel(String picPath, int price, String name, int goodId, int goodCount) {        this.picPath = picPath;        this.price = price;        this.name = name;        this.goodId = goodId;        this.goodCount = goodCount;        this.setBorder(new CompoundBorder(null, new LineBorder(new Color(255,                0, 0), 2)));        this.setLayout(new BorderLayout(0, 0));        lbl_Pic = new JLabel();        this.add(lbl_Pic, BorderLayout.CENTER);        lbl_Pic.setToolTipText(TIP);        // 单击图片可以选择购买或者取消购买；        lbl_Pic.addMouseListener(mouseAdapter);        JPanel panel_Prop = new JPanel();        this.add(panel_Prop, BorderLayout.SOUTH);        JLabel lbl_Name = new JLabel(this.name);        panel_Prop.add(lbl_Name);        txt_Price = new JTextField();        txt_Price.setEditable(false);        panel_Prop.add(txt_Price);        txt_Price.setColumns(2);        txt_Price.setText(this.price + MONEY_UNIT);        cbox_Select = new JCheckBox("购买");        if (this.goodCount <= 0) {            cbox_Select.setSelected(false);        }        panel_Prop.add(cbox_Select);        lbl_Remain = new JLabel("剩余：");        panel_Prop.add(lbl_Remain);        txt_Remain = new JTextField();        txt_Remain.setEditable(false);        panel_Prop.add(txt_Remain);        txt_Remain.setColumns(2);        lbl_Remain.setVisible(false);        txt_Remain.setVisible(false);        initPic();    }    /**     * 图片的响应事件     */    MouseAdapter mouseAdapter = new MouseAdapter() {        @Override        public void mouseClicked(MouseEvent e) {            if (goodCount > 0)                cbox_Select.setSelected(!cbox_Select.isSelected());        }    };    /**     * 设置商品数量     *      * @param goodCount     */    public void setGoodCount(int goodCount) {        this.goodCount = goodCount;        if (this.goodCount <= 0) {            cbox_Select.setEnabled(false);        } else {            if (!cbox_Select.isEnabled()) {                cbox_Select.setEnabled(true);            }        }    }    /**     * 初始化显示的商品图片     */    private void initPic() {        if (this.picPath == null) {            return;        }        new Thread() {            @Override            public void run() {                int width = getWidth();                while (width == 0) {                    try {                        Thread.sleep(100);                    } catch (InterruptedException e) {                        e.printStackTrace();                    }                    width = getWidth();                }                int height = getHeight();                File input = new File(picPath);                if (!input.exists()) {                    return;                }                try {                    BufferedImage image = ImageIO.read(input);                    ImageIcon bgIcon = new ImageIcon(image.getScaledInstance(                            width, height, Image.SCALE_DEFAULT));                    lbl_Pic.setIcon(bgIcon);                    repaint();                } catch (IOException e) {                    e.printStackTrace();                }            }        }.start();    }    /**     * 是否购买该商品     *      * @return     */    public boolean isSelected() {        return cbox_Select.isSelected();    }    /**     * 获取商品编号     *      * @return     */    public int getGoodId() {        return goodId;    }    /**     * 购买完毕后需要重置     */    public void reInit() {        cbox_Select.setSelected(false);    }    /**     * 显示商品余量     */    public void showRemain() {        new Thread() {            @Override            public void run() {                lbl_Remain.setVisible(true);                txt_Remain.setText(goodCount + "");                txt_Remain.setVisible(true);                repaint();                try {                    Thread.sleep(5000);                    lbl_Remain.setVisible(false);                    txt_Remain.setVisible(false);                    repaint();                } catch (InterruptedException e) {                    e.printStackTrace();                }            }        }.start();    }}1
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