import java.awt.*;import java.sql.*;import java.awt.event.*;import java.util.Vector;import javax.swing.*;import java.sql.*;import javax.swing.border.EmptyBorder;public class test1 extends JFrame implements ActionListener {    //private static final String  = null;    public static void main(String[] args) {        EventQueue.invokeLater(new Runnable() {            public void run() {                try {                    test1 frame = new test1();                    frame.setVisible(true);                } catch (Exception e) {                    e.printStackTrace();                }            }        });    }    int orderid=0;    public test1()     {                setTitle("点菜系统");        setSize(600,600); //设置窗口大小        setLocation(100,100); //设置窗口的位置                ImageIcon image = new ImageIcon("Image/huanyingguanglin.PNG");         image.setImage(image.getImage().getScaledInstance(600,530,Image.SCALE_DEFAULT));         // 把背景图片显示在一个标签里面          JLabel label = new JLabel(image);          // 把标签的大小位置设置为图片刚好填充整个面板          label.setBounds(0, 0, this.getWidth(), this.getHeight());          // 把内容窗格转化为JPanel，否则不能用方法setOpaque()来使内容窗格透明          JPanel imagePanel = (JPanel) this.getContentPane();          imagePanel.setOpaque(false);          // 把背景图片添加到分层窗格的最底层作为背景          this.getLayeredPane().add(label, new Integer(Integer.MIN_VALUE));                 JButton jb=new JButton();        jb.addActionListener(this);  //增加监听        jb.setActionCommand("Welcome"); //监听信号        jb.setPreferredSize(new Dimension(250,50));        jb.setFont(new Font("宋体",Font.BOLD,20));        jb.setText("欢迎顾客点击进入菜单");               JPanel jp=new JPanel();        jp.setOpaque(false);        jp.setLayout(new GridBagLayout());        GridBagConstraints c=new GridBagConstraints();        c.fill=GridBagConstraints.NONE;        c.gridx=0; c.gridy=0;        c.insets=new Insets(300,0,50,50);        jp.add(jb,c);                jb=new JButton();        jb.addActionListener(this);        jb.setActionCommand("Close");        jb.setPreferredSize(new Dimension(250,50));        jb.setFont(new Font("宋体",Font.BOLD,20));        jb.setText("取消订单退出系统");        c=new GridBagConstraints();        c.fill=GridBagConstraints.NONE;        c.gridx=1; c.gridy=0;        c.insets=new Insets(300,0,50,50);        jp.add(jb,c);                this.add(jp);                setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);        setVisible(true);  //是否显示        }    public void actionPerformed(ActionEvent e)    {        try        {            String url = "jdbc:mysql://localhost:3306/test" ;  //下面几行都是模板                String user = "root" ;               String password = "" ;            Class.forName("com.mysql.jdbc.Driver");            Connection conn=DriverManager.getConnection(url, user, password);            PreparedStatement ps=null;                        if(e.getActionCommand()=="Welcome")            {                    ps=conn.prepareStatement("select count(*) from OrderDish");                 ResultSet re=ps.executeQuery();                while(re.next()) orderid=re.getInt(1);                orderid++;                ps=conn.prepareStatement("insert into OrderDish values(?,0)");                ps.setInt(1, orderid);                 ps.executeUpdate();                OrderDish order=new OrderDish(this,"菜单",true,orderid); //新的对话界面            }            else if(e.getActionCommand()=="Close")            {                 ps=conn.prepareStatement("delete from OrderItem where orderid=?");                ps.setInt(1, orderid);                ps.executeUpdate();                ps=conn.prepareStatement("delete from OrderDish where orderid=?");                 ps.setInt(1, orderid);                ps.executeUpdate();                this.dispose();            }            }        catch(Exception exp){ exp.printStackTrace(); }    }}class OrderDish extends JDialog implements ActionListener{    JPanel[] jp={null,null,null,null};    JTabbedPane jtp=null;    JButton but=null;    JPanel topPane=null,bottomPane=null,pane=null;    JPanel[] zhushi={null,null,null,null,null,null,null,null,null,null};    JLabel lab=null;        JCheckBox[] zhushicheck={null,null,null,null,null,null,null,null,null};    JCheckBox[] sushicheck={null,null,null,null,null,null,null,null};    JCheckBox[] xiaochicheck={null,null,null,null,null,null};    JCheckBox[] yinpincheck={null,null,null,null,null,null};    JComboBox[] zhushicombo={null,null,null,null,null,null,null,null,null};    JComboBox[] sushicombo={null,null,null,null,null,null,null,null};    JComboBox[] xiaochicombo={null,null,null,null,null,null};    JComboBox[] yinpincombo={null,null,null,null,null,null};        ImageIcon image=null;    JScrollPane[] jsp={null,null,null,null};        String[] zhushiAL={ "zhushi0","zhushi1","zhushi2","zhushi3","zhushi4","zhushi5","zhushi6","zhushi7","zhushi8" };    String[] sushiAL={ "sushi0","sushi1","sushi2","sushi3","sushi4","sushi5","sushi6","sushi7" };    String[] xiaochiAL={ "xiaochi0","xiaochi1","xiaochi2","xiaochi3","xiaochi4","xiaochi5" };    String[] yinpinAL={ "yinpin0","yinpin1","yinpin2","yinpin3","yinpin4","yinpin5" };        String[] zhushinumAL={ "zhushinum0","zhushinum1","zhushinum2","zhushinum3","zhushinum4","zhushinum5","zhushinum6","zhushinum7","zhushinum8" };    String[] sushinumAL={ "sushinum0","sushinum1","sushinum2","sushinum3","sushinum4","sushinum5","sushinum6","sushinum7" };    String[] xiaochinumAL={ "xiaochinum0","xiaochinum1","xiaochinum2","xiaochinum3","xiaochinum4","xiaochinum5" };    String[] yinpinnumAL={ "yinpinnum0","yinpinnum1","yinpinnum2","yinpinnum3","yinpinnum4","yinpinnum5" };    int orderid=0,zhushinum=9,sushinum=8,xiaochinum=6,yinpinnum=6;        OrderDish(Frame a,String b,boolean c,int oid)    {        super(a,b,c);        orderid=oid;        this.setTitle("菜单");        this.setSize(600,600);        this.setLocation(200,100);                        //右上角碗碟图片        image = new ImageIcon("Image/碗碟.PNG");         image.setImage(image.getImage().getScaledInstance(300,100,Image.SCALE_DEFAULT));         lab=new JLabel(image);        //左上角查看当前订单按钮        but=new JButton();        but.setForeground(Color.RED);        but.setFont(new Font("宋体",Font.BOLD,25));        but.setText("点击查看当前订单");        but.setBackground(Color.WHITE);        but.setPreferredSize(new Dimension(280,90));        but.addActionListener(this);        but.setActionCommand("ViewOrder"); //点击查看当前订单监听器        pane=new JPanel();        pane.setBackground(Color.WHITE);        pane.add(but);                //上部分面板        topPane=new JPanel();        topPane.setLayout(new GridLayout(1,2));        topPane.add(pane);        topPane.add(lab);        this.add(topPane,BorderLayout.NORTH);                //四个选项卡面板        jp[0]=new JPanel();        jp[1]=new JPanel();        jp[2]=new JPanel();        jp[3]=new JPanel();        //给第0个面板添加内容        jp[0].setLayout(new GridLayout(3,3,10,10));        for(int i=0;i<zhushinum;i++) zhushi[i]=new JPanel(); //多个面板存放不同的菜                String[] num={"1","2","3","4","5"};        String[] zhushiname={"水煮肉片  20元/份 ", "农家小炒肉  19元/份", "回锅牛肉 28元/份",                "红烧鱼块 24元/份", "干烧刁子鱼 24元/份", "干锅手撕鸡 22元/份",                "香菇焖鸡 26元/份", "四季豆牛肚丝 26元/份", "鱼香肉丝 19元/份"};        String[] zhushitp={               "Image/shuizhuroupian.PNG","Image/nongjiaxiaochaorou.PNG","Image/huiguoniurou.PNG",               "Image/hongshaoyukuai.PNG","Image/ganshaodiaoziyu.PNG","Image/ganguoshousiji.PNG",               "Image/xianggumenji.PNG","Image/sijidouniudusi.PNG","Image/yuxiangrousi.PNG"        };        //给每个菜的面板添加内容        for(int i=0;i<zhushinum;i++)        {            bottomPane=new JPanel();            bottomPane.setLayout(new GridLayout(2,1));                        zhushicheck[i]=new JCheckBox("选中");            zhushicheck[i].addActionListener(this);            zhushicheck[i].setActionCommand(zhushiAL[i]); //增加监听器                        lab=new JLabel(zhushiname[i]);            bottomPane.add(lab);                         zhushicombo[i]=new JComboBox(num); //下拉列表框            zhushicombo[i].setSelectedIndex(0); //设置默认为1(第0个数)            zhushicombo[i].addActionListener(this);            zhushicombo[i].setActionCommand(zhushinumAL[i]);                        lab=new JLabel("份");            pane=new JPanel();            pane.add(zhushicheck[i]); pane.add(zhushicombo[i]); pane.add(lab);            bottomPane.add(pane);                         image= new ImageIcon(zhushitp[i]);             image.setImage(image.getImage().getScaledInstance(180,120,Image.SCALE_DEFAULT));            lab=new JLabel(image);                        zhushi[i].add(lab,BorderLayout.CENTER);            zhushi[i].add(bottomPane,BorderLayout.SOUTH);        }                //把所有菜的面板加入到大面板中去        for(int i=0;i<zhushinum;i++) jp[0].add(zhushi[i]);        jp[0].setPreferredSize(new Dimension(560,600));        jsp[0]=new JScrollPane(jp[0]);             //给第1个面板添加内容        String[] sushiname={           "酸辣土豆丝 12元/份","番茄炒蛋 13元/份","豆角炒茄子 13元/份",           "麻婆豆腐 12元/份","手撕包菜 10元/份","小炒香干 13元/份",           "小炒千叶豆腐 16元/份","口味黑木耳 16元/份"        };        String[] sushitp={            "sushi/suanlatudousi.PNG","sushi/fanqiechaodan.PNG","sushi/doujiaochaoqiezi.PNG",            "sushi/mapodoufu.PNG","sushi/shousibaocai.PNG","sushi/xiaochaoxianggan.PNG",            "sushi/xiaochaoqianyedoufu.PNG","sushi/kouweiheimuer.PNG"        };        jp[1].setLayout(new GridLayout(3,3,10,10));        for(int i=0;i<sushinum;i++) zhushi[i]=new JPanel(); //多个面板存放不同的菜            //给每个菜的面板添加内容        for(int i=0;i<sushinum;i++)        {            bottomPane=new JPanel();            bottomPane.setLayout(new GridLayout(2,1));                        sushicheck[i]=new JCheckBox("选中");            sushicheck[i].addActionListener(this);            sushicheck[i].setActionCommand(sushiAL[i]); //增加监听器                        lab=new JLabel(sushiname[i]);            bottomPane.add(lab);                         sushicombo[i]=new JComboBox(num); //下拉列表框            sushicombo[i].setSelectedIndex(0); //设置默认为1(第0个数)            sushicombo[i].addActionListener(this);            sushicombo[i].setActionCommand(sushinumAL[i]);                        lab=new JLabel("份");            pane=new JPanel();            pane.add(sushicheck[i]); pane.add(sushicombo[i]); pane.add(lab);            bottomPane.add(pane);                         image= new ImageIcon(sushitp[i]);             image.setImage(image.getImage().getScaledInstance(180,120,Image.SCALE_DEFAULT));            lab=new JLabel(image);                        zhushi[i].add(lab,BorderLayout.CENTER);            zhushi[i].add(bottomPane,BorderLayout.SOUTH);        }        for(int i=0;i<sushinum;i++) jp[1].add(zhushi[i]);        jp[1].setPreferredSize(new Dimension(560,600));        jsp[1]=new JScrollPane(jp[1]);                //给第2个面板添加内容        String[] xiaochiname={            "鸡米花  10元/份","无骨鸡柳 10元/份","骨肉相连 10元/份",            "薯条 8元/份","川香鸡柳 10元/份","香酥鸡块 15元/份"        };        String[] xiaochitp={                "xiaochi/jimihua.PNG","xiaochi/wugujiliu.PNG","xiaochi/gurouxianglian.PNG",                "xiaochi/shutiao.PNG","xiaochi/chuanxiangjiliu.PNG","xiaochi/xiangsujikuai.PNG"        };        jp[2].setLayout(new GridLayout(2,3,10,10));        for(int i=0;i<xiaochinum;i++) zhushi[i]=new JPanel(); //多个面板存放不同的菜            //给每个菜的面板添加内容        for(int i=0;i<xiaochinum;i++)        {            bottomPane=new JPanel();            bottomPane.setLayout(new GridLayout(2,1));                        xiaochicheck[i]=new JCheckBox("选中");            xiaochicheck[i].addActionListener(this);            xiaochicheck[i].setActionCommand(xiaochiAL[i]); //增加监听器                        lab=new JLabel(xiaochiname[i]);            bottomPane.add(lab);                         xiaochicombo[i]=new JComboBox(num); //下拉列表框            xiaochicombo[i].setSelectedIndex(0); //设置默认为1(第0个数)            xiaochicombo[i].addActionListener(this);            xiaochicombo[i].setActionCommand(xiaochinumAL[i]);                        lab=new JLabel("份");            pane=new JPanel();            pane.add(xiaochicheck[i]); pane.add(xiaochicombo[i]); pane.add(lab);            bottomPane.add(pane);                         image= new ImageIcon(xiaochitp[i]);             image.setImage(image.getImage().getScaledInstance(180,120,Image.SCALE_DEFAULT));            lab=new JLabel(image);                        zhushi[i].add(lab,BorderLayout.CENTER);            zhushi[i].add(bottomPane,BorderLayout.SOUTH);        }        for(int i=0;i<xiaochinum;i++) jp[2].add(zhushi[i]);        jp[2].setPreferredSize(new Dimension(560,400));        jsp[2]=new JScrollPane(jp[2]);                //给第3个面板添加内容        String[] yinpinname={                "红豆奶茶  10元/份","芒果奶昔 10元/份","蜜桃奶昔 10元/份",                "姜母茶 15元/份","原味奶茶 10元/份","咖啡奶茶 10元/份"            };        String[] yinpintp={            "yinpin/hongdounaicha.PNG","yinpin/mangguonaixi.PNG","yinpin/mitaonaixi.PNG",            "yinpin/jiangmucha.PNG","yinpin/yuanweinaicha.PNG","yinpin/kafeinaicha.PNG"        };            jp[3].setLayout(new GridLayout(2,3,10,10));            for(int i=0;i<yinpinnum;i++) zhushi[i]=new JPanel(); //多个面板存放不同的菜                    //给每个菜的面板添加内容            for(int i=0;i<yinpinnum;i++)            {                bottomPane=new JPanel();                bottomPane.setLayout(new GridLayout(2,1));                                yinpincheck[i]=new JCheckBox("选中");                yinpincheck[i].addActionListener(this);                yinpincheck[i].setActionCommand(yinpinAL[i]); //增加监听器                                lab=new JLabel(yinpinname[i]);                bottomPane.add(lab);                                 yinpincombo[i]=new JComboBox(num); //下拉列表框                yinpincombo[i].setSelectedIndex(0); //设置默认为1(第0个数)                yinpincombo[i].addActionListener(this);                yinpincombo[i].setActionCommand(yinpinnumAL[i]);                                lab=new JLabel("份");                pane=new JPanel();                pane.add(yinpincheck[i]); pane.add(yinpincombo[i]); pane.add(lab);                bottomPane.add(pane);                                 image= new ImageIcon(yinpintp[i]);                 image.setImage(image.getImage().getScaledInstance(180,120,Image.SCALE_DEFAULT));                lab=new JLabel(image);                                zhushi[i].add(lab,BorderLayout.CENTER);                zhushi[i].add(bottomPane,BorderLayout.SOUTH);            }                //把所有菜的面板加入到大面板中去        for(int i=0;i<yinpinnum;i++) jp[3].add(zhushi[i]);        jp[3].setPreferredSize(new Dimension(560,400));        jsp[3]=new JScrollPane(jp[3]);                jtp=new JTabbedPane();        jtp.add("主食",jsp[0]);        jtp.add("素食",jsp[1]);        jtp.add("小吃",jsp[2]);        jtp.add("饮品",jsp[3]);                                this.add(jtp,BorderLayout.CENTER);                JPanel bottomPane=new JPanel();        but=new JButton();        but.setFont(new Font("宋体",Font.BOLD,20));        but.setText(" 前往结账   ");        but.addActionListener(this);        but.setActionCommand("jiezhang");        bottomPane.add(but);                but=new JButton();        but.setFont(new Font("宋体",Font.BOLD,20));        but.setText(" 重新选菜   ");        but.addActionListener(this);        but.setActionCommand("chongxuan");        bottomPane.add(but);                but=new JButton();        but.setFont(new Font("宋体",Font.BOLD,20));        but.setText("   返回     ");        but.addActionListener(this);        but.setActionCommand("Close");        bottomPane.add(but);                this.add(bottomPane,BorderLayout.SOUTH);                setDefaultCloseOperation(JDialog.DISPOSE_ON_CLOSE);        setVisible(true);  //是否显示        }    public int Getzhushi(String s)    {        for(int i=0;i<zhushinum;i++) if(s==zhushiAL[i]) return i;        return -1;    }    public int Getzhushinum(String s)    {        for(int i=0;i<zhushinum;i++) if(s==zhushinumAL[i]) return i;        return -1;    }    public int Getsushi(String s)    {        for(int i=0;i<sushinum;i++) if(s==sushiAL[i]) return i;        return -1;    }    public int Getsushinum(String s)    {        for(int i=0;i<sushinum;i++) if(s==sushinumAL[i]) return i;        return -1;    }    public int Getxiaochi(String s)    {        for(int i=0;i<xiaochinum;i++) if(s==xiaochiAL[i]) return i;        return -1;    }    public int Getxiaochinum(String s)    {        for(int i=0;i<xiaochinum;i++) if(s==xiaochinumAL[i]) return i;        return -1;    }    public int Getyinpin(String s)    {        for(int i=0;i<yinpinnum;i++) if(s==yinpinAL[i]) return i;        return -1;    }    public int Getyinpinnum(String s)    {        for(int i=0;i<yinpinnum;i++) if(s==yinpinnumAL[i]) return i;        return -1;    }    public void actionPerformed(ActionEvent e)    {        if(e.getActionCommand()=="Close") this.dispose(); //关闭窗口        else if(e.getActionCommand()=="jiezhang") { Check ck=new Check(this,"结账",true,orderid); }//产生结账窗口        else if(e.getActionCommand()=="chongxuan")        {            //把所有的选择取消,并删除数据库中所有选菜内容            for(int i=0;i<zhushinum;i++)             {                 if(zhushicheck[i].isSelected())    zhushicheck[i].setSelected(false);                zhushicombo[i].setSelectedIndex(0);            }            for(int i=0;i<sushinum;i++)             {                 if(sushicheck[i].isSelected()) sushicheck[i].setSelected(false);                 zhushicombo[i].setSelectedIndex(0);            }            for(int i=0;i<xiaochinum;i++)             {                if(xiaochicheck[i].isSelected()) xiaochicheck[i].setSelected(false);                xiaochicombo[i].setSelectedIndex(0);            }            for(int i=0;i<yinpinnum;i++)            {                if(yinpincheck[i].isSelected()) yinpincheck[i].setSelected(false);                yinpincombo[i].setSelectedIndex(0);            }            try            {                String url = "jdbc:mysql://localhost:3306/test" ;  //下面几行都是模板                    String user = "root" ;                   String password = "" ;                Class.forName("com.mysql.jdbc.Driver");                Connection conn=DriverManager.getConnection(url, user, password);                PreparedStatement ps=null;                                 ps=conn.prepareStatement("delete from OrderItem where orderid=?");                 ps.setInt(1, orderid);                ps.executeUpdate();                    }            catch(Exception exp)            {                 exp.printStackTrace();            }            return;        }        else if(e.getActionCommand()=="ViewOrder"){ View view=new View(this,"当前订单",true,orderid); }        else        {            try            {                String url = "jdbc:mysql://localhost:3306/test" ;  //下面几行都是模板                    String user = "root" ;                   String password = "" ;                Class.forName("com.mysql.jdbc.Driver");                Connection conn=DriverManager.getConnection(url, user, password);                PreparedStatement ps=null;                 int a=Getzhushi(e.getActionCommand());                if(a!=-1)                {                    if(zhushicheck[a].isSelected())                     {                        ps=conn.prepareStatement("insert into OrderItem values(?,?,?)");                        ps.setInt(1,orderid); ps.setString(2, zhushiAL[a]);                        int num=zhushicombo[a].getSelectedIndex()+1;                        ps.setInt(3, num);                        ps.executeUpdate();                    }                    else                    {                        ps=conn.prepareStatement("delete from OrderItem where orderid=? and id=?");                        ps.setInt(1, orderid); ps.setString(2, zhushiAL[a]);                        ps.executeUpdate();                    }                    return;                }                a=Getsushi(e.getActionCommand());                if(a!=-1)                {                                        if(sushicheck[a].isSelected())                     {                        ps=conn.prepareStatement("insert into OrderItem values(?,?,?)");                        ps.setInt(1,orderid); ps.setString(2, sushiAL[a]);                        int num=sushicombo[a].getSelectedIndex()+1;                        ps.setInt(3, num);                        ps.executeUpdate();                    }                    else                    {                        ps=conn.prepareStatement("delete from OrderItem where orderid=? and id=?");                        ps.setInt(1, orderid); ps.setString(2, sushiAL[a]);                        ps.executeUpdate();                    }                    return;                }                a=Getxiaochi(e.getActionCommand());                if(a!=-1)                {                    if(xiaochicheck[a].isSelected())                     {                        ps=conn.prepareStatement("insert into OrderItem values(?,?,?)");                        ps.setInt(1,orderid); ps.setString(2, xiaochiAL[a]);                        int num=xiaochicombo[a].getSelectedIndex()+1;                        ps.setInt(3, num);                        ps.executeUpdate();                    }                    else                    {                        ps=conn.prepareStatement("delete from OrderItem where orderid=? and id=?");                        ps.setInt(1, orderid); ps.setString(2, xiaochiAL[a]);                        ps.executeUpdate();                    }                    return;                }                a=Getyinpin(e.getActionCommand());                if(a!=-1)                {                    if(yinpincheck[a].isSelected())                     {                        ps=conn.prepareStatement("insert into OrderItem values(?,?,?)");                        ps.setInt(1,orderid); ps.setString(2, yinpinAL[a]);                        int num=yinpincombo[a].getSelectedIndex()+1;                        ps.setInt(3, num);                        ps.executeUpdate();                    }                    else                    {                        ps=conn.prepareStatement("delete from OrderItem where orderid=? and id=?");                        ps.setInt(1, orderid); ps.setString(2, yinpinAL[a]);                        ps.executeUpdate();                    }                    return;                }                a=Getzhushinum(e.getActionCommand());                if(a!=-1)                {                    if(zhushicheck[a].isSelected())                    {                        ps=conn.prepareStatement("update OrderItem set num=? where orderid=? and id=?");                        int num=zhushicombo[a].getSelectedIndex()+1;                        ps.setInt(1, num);    ps.setInt(2, orderid); ps.setString(3, zhushiAL[a]);                            ps.executeUpdate();                    }                }                a=Getsushinum(e.getActionCommand());                if(a!=-1)                {                    if(sushicheck[a].isSelected())                    {                        ps=conn.prepareStatement("update OrderItem set num=? where orderid=? and id=?");                        int num=sushicombo[a].getSelectedIndex()+1;                        ps.setInt(1, num);    ps.setInt(2, orderid); ps.setString(3, sushiAL[a]);                            ps.executeUpdate();                    }                }                a=Getxiaochinum(e.getActionCommand());                if(a!=-1)                {                    if(xiaochicheck[a].isSelected())                    {                        ps=conn.prepareStatement("update OrderItem set num=? where orderid=? and id=?");                        int num=xiaochicombo[a].getSelectedIndex()+1;                        ps.setInt(1, num);    ps.setInt(2, orderid); ps.setString(3, xiaochiAL[a]);                            ps.executeUpdate();                    }                }                a=Getyinpinnum(e.getActionCommand());                if(a!=-1)                {                    if(yinpincheck[a].isSelected())                    {                        ps=conn.prepareStatement("update OrderItem set num=? where orderid=? and id=?");                        int num=yinpincombo[a].getSelectedIndex()+1;                        ps.setInt(1, num);    ps.setInt(2, orderid); ps.setString(3, yinpinAL[a]);                            ps.executeUpdate();                    }                }                             }            catch(Exception exp)            {                exp.printStackTrace();            }                    }    }}class View extends JDialog implements ActionListener{    JScrollPane[] jsp={null,null,null,null,null};    int orderid=0;    View(JDialog a,String b,boolean c,int oid)    {        super(a,b,c);        orderid=oid;        this.setSize(600,600);        this.setLocation(300,100);        //连接数据库把选菜信息显示出来        JTabbedPane jtp=new JTabbedPane();        String[] sql={            "select name,price,num from Dish,OrderItem where orderid=? and OrderItem.id=Dish.id",            "select name,price,num from Dish,OrderItem where orderid=? and OrderItem.id=Dish.id and Dish.id like ‘zhushi%‘",            "select name,price,num from Dish,OrderItem where orderid=? and OrderItem.id=Dish.id and Dish.id like ‘sushi%‘",            "select name,price,num from Dish,OrderItem where orderid=? and OrderItem.id=Dish.id and Dish.id like ‘xiaochi%‘",            "select name,price,num from Dish,OrderItem where orderid=? and OrderItem.id=Dish.id and Dish.id like ‘yinpin%‘"        };        try        {            String url = "jdbc:mysql://localhost:3306/test" ;  //下面几行都是模板                String user = "root" ;               String password = "" ;            Class.forName("com.mysql.jdbc.Driver");            Connection conn=DriverManager.getConnection(url, user, password);            PreparedStatement ps=null;                         for(int i=0;i<5;i++)            {                Vector ziduan=new Vector();                ziduan.add("菜名"); ziduan.add("单价"); ziduan.add("数量");                Vector jilu=new Vector(); //集合类                      //这里就要连接数据库把信息显示出来                ps=conn.prepareStatement(sql[i]);                 ps.setInt(1, orderid);                ResultSet re=ps.executeQuery();                while(re.next())                {                    String name=re.getString(1);                    String price =String.format("%d", re.getInt(2));                    String num=String.format("%d", re.getInt(3));                    Vector v=new Vector();                    v.add(name); v.add(price); v.add(num);                    jilu.add(v);                }                JTable tab=new JTable(jilu,ziduan);//JTable是表格,里面的参数是先记录后字段                tab.setFont(new Font("楷体",Font.BOLD,20));                tab.setBackground(Color.CYAN);                tab.setRowHeight(30);                jsp[i]=new JScrollPane(tab); //滚动条                            }        }        catch(Exception exp)        {             exp.printStackTrace();        }                jtp.add("所有",jsp[0]);        jtp.add("主食",jsp[1]);        jtp.add("素食",jsp[2]);        jtp.add("小吃",jsp[3]);        jtp.add("饮品",jsp[4]);        this.add(jtp,BorderLayout.CENTER);                JButton but=new JButton();        but.setFont(new Font("宋体",Font.BOLD,20));        but.setText(" 返回  ");        but.addActionListener(this);        but.setActionCommand("exit");        JPanel pane=new JPanel();        pane.add(but,BorderLayout.CENTER);        this.add(pane,BorderLayout.SOUTH);        setDefaultCloseOperation(JDialog.DISPOSE_ON_CLOSE);        setVisible(true);  //是否显示    }    public void actionPerformed(ActionEvent e)    {        if(e.getActionCommand()=="exit")        {            this.dispose();        }    }}class Check extends JDialog implements ActionListener{    JButton[] jb={null,null};    int orderid=0,sum=0;    Check(JDialog a,String b,boolean c,int oid)    {        super(a,b,c);        orderid=oid;        this.setTitle("结账");        this.setSize(600,600);        this.setLocation(300,100);                //连接数据库把所有选菜信息显示出来        Vector ziduan=new Vector();        ziduan.add("菜名"); ziduan.add("单价"); ziduan.add("数量");        Vector jilu=new Vector();        //连接数据库得到信息        try        {            String url = "jdbc:mysql://localhost:3306/test" ;  //下面几行都是模板                String user = "root" ;               String password = "" ;            Class.forName("com.mysql.jdbc.Driver");            Connection conn=DriverManager.getConnection(url, user, password);            PreparedStatement ps=null;                         ps=conn.prepareStatement("select name,price,num from Dish,OrderItem where orderid=? and OrderItem.id=Dish.id");             ps.setInt(1, orderid);            ResultSet re=ps.executeQuery();            while(re.next())            {                String name=re.getString(1);                int p=re.getInt(2);                int t=re.getInt(3);                sum+=p*t;                String price =String.format("%d", p);                String num=String.format("%d", t);                Vector v=new Vector();                v.add(name); v.add(price); v.add(num);                jilu.add(v);            }                    }        catch(Exception exp)        {             exp.printStackTrace();        }        //加总价标签        JLabel lab=new JLabel();        lab.setFont(new Font("宋体",Font.BOLD,20));        lab.setText("总计 "+sum+"元");        lab.setHorizontalAlignment(JLabel.CENTER);        this.add(lab,BorderLayout.NORTH);        //加表格记录        JTable tab=new JTable(jilu,ziduan);//JTable是表格,里面的参数是先记录后字段        tab.setFont(new Font("楷体",Font.BOLD,20));        tab.setBackground(Color.CYAN);        tab.setRowHeight(30);        JScrollPane jsp=new JScrollPane(tab); //滚动条            this.add(jsp,BorderLayout.CENTER);        //加按钮        jb[0]=new JButton();        jb[0].setFont(new Font("宋体",Font.BOLD,20));        jb[0].setText("  确认支付   ");        jb[0].addActionListener(this);        jb[0].setActionCommand("Pay");                jb[1]=new JButton();        jb[1].setFont(new Font("宋体",Font.BOLD,20));        jb[1].setText("  返回    ");        jb[1].addActionListener(this);        jb[1].setActionCommand("Close");                JPanel bottomPane=new JPanel();        bottomPane.add(jb[0]); bottomPane.add(jb[1]);        this.add(bottomPane,BorderLayout.SOUTH);                setDefaultCloseOperation(JDialog.DISPOSE_ON_CLOSE);        setVisible(true);  //是否显示    }    public void actionPerformed(ActionEvent e)    {        //        if(e.getActionCommand()=="Close")        {            this.dispose();        }        else if(e.getActionCommand()=="Pay")        {            try            {                String url = "jdbc:mysql://localhost:3306/test" ;  //下面几行都是模板                    String user = "root" ;                   String password = "" ;                Class.forName("com.mysql.jdbc.Driver");                Connection conn=DriverManager.getConnection(url, user, password);                PreparedStatement ps=null;                 ps=conn.prepareStatement("update OrderDish set money=? where orderid=?");                ps.setInt(1, sum); ps.setInt(2, orderid);                ps.executeUpdate();                            }            catch(Exception exp)            {                 exp.printStackTrace();            }            Pay pay=new Pay(this,"支付",true);        }    }}class Pay extends JDialog implements ActionListener{    JTabbedPane jtp=null;    JButton jb=null;    JPanel bottomPane=null;    JLabel[] jl={null,null,null,null};    ImageIcon image=null;    Pay(JDialog a,String b,boolean c)    {        super(a,b,c);        this.setSize(600,600);        this.setLocation(400,100);        image= new ImageIcon("Image/zhifubao.PNG");         image.setImage(image.getImage().getScaledInstance(600,500,Image.SCALE_DEFAULT));        jl[0]=new JLabel(image);        image= new ImageIcon("Image/weixin.PNG");         image.setImage(image.getImage().getScaledInstance(600,500,Image.SCALE_DEFAULT));        jl[1]=new JLabel(image);        image= new ImageIcon("Image/wangyin.PNG");         image.setImage(image.getImage().getScaledInstance(600,500,Image.SCALE_DEFAULT));        jl[2]=new JLabel(image);        image= new ImageIcon("Image/xianjing.PNG");         image.setImage(image.getImage().getScaledInstance(600,500,Image.SCALE_DEFAULT));        jl[3]=new JLabel(image);                jtp=new JTabbedPane();        jtp.add("支付宝支付",jl[0]);        jtp.add(" 微信支付  ",jl[1]);        jtp.add(" 网银支付  ",jl[2]);        jtp.add(" 现金支付  ",jl[3]);                this.add(jtp,BorderLayout.CENTER);                jb=new JButton();        jb.setFont(new Font("宋体",Font.BOLD,20));        jb.setText("   完成退出      ");        jb.addActionListener(this);        jb.setActionCommand("exit");                bottomPane=new JPanel();        bottomPane.add(jb);        this.add(bottomPane,BorderLayout.SOUTH);                setDefaultCloseOperation(JDialog.DISPOSE_ON_CLOSE);        setVisible(true);      }    public void actionPerformed(ActionEvent e)    {        if(e.getActionCommand()=="exit")        {            this.dispose();        }    }}

CREATE TABLE OrderDish(    orderid int not null,    money int,    primary key(orderid));CREATE TABLE Dish(    id varchar(20) not null,    name nchar(10),    price int,    type nchar(10),    primary key(id));insert into Dish values(‘zhushi0‘,‘水煮肉片‘,20,‘主食‘);insert into Dish values(‘zhushi1‘,‘农家小炒肉‘,19,‘主食‘);insert into Dish values(‘zhushi2‘,‘回锅牛肉‘,28,‘主食‘);insert into Dish values(‘zhushi3‘,‘红烧鱼块‘,24,‘主食‘);insert into Dish values(‘zhushi4‘,‘干烧刁子鱼‘,24,‘主食‘);insert into Dish values(‘zhushi5‘,‘干锅手撕鸡‘,22,‘主食‘);insert into Dish values(‘zhushi6‘,‘香菇焖鸡‘,26,‘主食‘);insert into Dish values(‘zhushi7‘,‘四季豆牛肚丝‘,26,‘主食‘);insert into Dish values(‘zhushi8‘,‘鱼香肉丝‘,19,‘主食‘);    insert into Dish values(‘sushi0‘,‘酸辣土豆丝‘,12,‘素食‘);insert into Dish values(‘sushi1‘,‘番茄炒蛋‘,13,‘素食‘);insert into Dish values(‘sushi2‘,‘豆角炒茄子‘,13,‘素食‘);insert into Dish values(‘sushi3‘,‘麻婆豆腐‘,12,‘素食‘);insert into Dish values(‘sushi4‘,‘手撕包菜‘,10,‘素食‘);insert into Dish values(‘sushi5‘,‘小炒香干‘,13,‘素食‘);insert into Dish values(‘sushi6‘,‘小炒千叶豆腐‘,16,‘素食‘);insert into Dish values(‘sushi7‘,‘口味黑木耳‘,16,‘素食‘);insert into Dish values(‘xiaochi0‘,‘鸡米花‘,10,‘小吃‘);insert into Dish values(‘xiaochi1‘,‘无骨鸡柳‘,10,‘小吃‘);insert into Dish values(‘xiaochi2‘,‘骨肉相连‘,10,‘小吃‘);insert into Dish values(‘xiaochi3‘,‘薯条‘,8,‘小吃‘);insert into Dish values(‘xiaochi4‘,‘川香鸡柳‘,10,‘小吃‘);insert into Dish values(‘xiaochi5‘,‘香酥鸡块‘,15,‘小吃‘);insert into Dish values(‘yinpin0‘,‘红豆奶茶‘,10,‘饮品‘);insert into Dish values(‘yinpin1‘,‘芒果奶昔‘,10,‘饮品‘);insert into Dish values(‘yinpin2‘,‘蜜桃奶昔‘,10,‘饮品‘);insert into Dish values(‘yinpin3‘,‘姜母茶‘,15,‘饮品‘);insert into Dish values(‘yinpin4‘,‘原味奶茶‘,10,‘饮品‘);insert into Dish values(‘yinpin5‘,‘咖啡奶茶‘,10,‘饮品‘);CREATE TABLE OrderItem(    orderid int not null,    id varchar(20) not null,    num int,    primary key(orderid,id),    foreign key(orderid) references OrderDish(orderid),    foreign key(id) references Dish(id));drop table OrderItem;drop table Dish;drop table OrderDish;try{                    }catch(Exception exp){     exp.printStackTrace();}String url = "jdbc:mysql://localhost:3306/test" ;  //下面几行都是模板    String user = "root" ;   String password = "" ;Class.forName("com.mysql.jdbc.Driver");Connection conn=DriverManager.getConnection(url, user, password);PreparedStatement ps=null; ps=conn.prepareStatement("select count(*) from OrderDish"); ResultSet re=ps.executeQuery();