java商场打折系统

package com.market6; /* * 优惠券界面 */ import java.awt.*; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import java.awt.event.KeyEvent; import java.awt.event.KeyListener; import java.awt.event.WindowAdapter; import java.awt.event.WindowEvent; import java.sql.Connection; import java.sql.DriverManager; import java.sql.ResultSet; import java.sql.SQLException; import java.sql.Statement; import javax.swing.*; /* * jc1=优惠券当现金使用，jc2=输入商品编号，jc3=输入优惠券金额，jc4=商品编号，jc5=商品名称,jc6=商品价格, * jc7=打折信息；jc8=总价,jc9=总价额,jc10=优惠金额,jc11=优惠额,jc12=应收,jc13=应收额,jc14=实收, * jc15=找零,jc16=找零额,jc17=空; * jpc1=商品信息栏,jpc2=输入栏,jpc3=商品价格栏；jpc4=商品信息列表； * jbc1=完成，jbc2=清空；jbc3=清空； * jtfc=输入商品编号处,jtfc1=输入优惠券金额处;jtfc2=输入实收金额； * jsc=滚动条，jtac=显示商品信息栏 * sum1=总价, sum2=优惠后总价, sum3=应收, sum4=实收, sum5=找零, sum6=优惠券输入的面值; * time=货物数量；a=获得商品编号； */ public class Privilege implements KeyListener, ActionListener { JLabel jc1, jc2, jc3, jc4, jc5, jc6, jc7, jc8, jc9, jc10, jc11, jc12, jc13, jc14, jc15, jc16, jc17; JPanel jpc1, jpc2, jpc3, jpc4; JButton jbc1, jbc2, jbc3; JTextField jtfc, jtfc1, jtfc2; JTextArea jta1, jta2; JScrollPane jsc = null; JTextArea jtac = null; float sum1, sum2, sum3, sum4, sum5, sum6; float f[]; float ff[]; double d[]; double dd[]; float fff[]; String n; String[] ss; String sss[]; int time = 1; int a, b; ResultSet rs1, rs2, rs3, rs4; Statement stmt = null; Connection conn = null; // 持有MarketClient的引用 MarketClient mc = null; public Privilege(MarketClient mc) { this.mc = mc; f = new float[200]; ff = new float[200]; d = new double[200]; dd = new double[200]; fff = new float[200]; ss = new String[200]; sss = new String[6]; } // 优惠券窗口 public void privilege() { mc.jp3.setLayout(new GridLayout(2, 2)); // 定义JLabel jc1 = new JLabel("优惠券当现金使用", JLabel.CENTER); jc1.setFont(new Font("隶书", Font.ITALIC, 26)); jc2 = new JLabel("输入商品编号", JLabel.CENTER); jc2.setFont(new Font("楷书", Font.BOLD, 16)); jc3 = new JLabel("输入优惠券金额", JLabel.CENTER); jc3.setFont(new Font("楷书", Font.BOLD, 16)); jc4 = new JLabel("商品编号", JLabel.CENTER); jc5 = new JLabel("商品名称", JLabel.CENTER); jc6 = new JLabel("商品价格", JLabel.CENTER); jc7 = new JLabel("打折信息", JLabel.CENTER); jc8 = new JLabel("总价", JLabel.CENTER); jc9 = new JLabel("", JLabel.CENTER); jc10 = new JLabel("优惠金额", JLabel.CENTER); jc11 = new JLabel("", JLabel.CENTER); jc12 = new JLabel("应收", JLabel.CENTER); jc13 = new JLabel("", JLabel.CENTER); jc14 = new JLabel("实收", JLabel.CENTER); jc15 = new JLabel("找零", JLabel.CENTER); jc16 = new JLabel("", JLabel.CENTER); jc17 = new JLabel(); // 定义JPanel jpc1 = new JPanel(); jpc1.setBackground(Color.GRAY); jpc1.setLayout(new BorderLayout()); jpc2 = new JPanel(); jpc2.setLayout(new GridLayout(3, 3, 10, 10)); // jpc2.setBackground(Color.WHITE); jpc3 = new JPanel(); jpc3.setLayout(new GridLayout(3, 3)); // jpc3.setBackground(Color.blue); jpc4 = new JPanel(); jpc4.setBackground(Color.PINK); jpc4.setLayout(new GridLayout(1, 4)); // 定义JButton jbc1 = new JButton("完成"); jbc1.addActionListener(this); jbc1.setActionCommand("a"); jbc2 = new JButton("清空"); jbc2.addActionListener(this); jbc2.setActionCommand("b"); jbc3 = new JButton("确定"); jbc3.addActionListener(this); jbc3.setActionCommand("c"); // 定义JTextField jtfc = new JTextField(); jtfc.addKeyListener(this); jtfc1 = new JTextField(); jtfc1.addKeyListener(this); jtfc2 = new JTextField(); // 定义JTextArea jtac = new JTextArea(); jtac.setEditable(false); // 定义JScrollPane jsc = new JScrollPane(jtac); // 往商品信息栏添加组件 jpc4.add(jc4); jpc4.add(jc5); jpc4.add(jc6); jpc4.add(jc7); jpc1.add(jpc4, BorderLayout.NORTH); jpc1.add(jsc, BorderLayout.CENTER); // 往输入栏里添加组件 jpc2.add(jc3); jpc2.add(jtfc1); jpc2.add(jc2); jpc2.add(jtfc); jpc2.add(jbc1); jpc2.add(jbc2); // 往价格信息栏添加组件 jpc3.add(jc8); jpc3.add(jc9); jpc3.add(jc10); jpc3.add(jc11); jpc3.add(jc12); jpc3.add(jc13); jpc3.add(jc14); jpc3.add(jtfc2); jpc3.add(jc15); jpc3.add(jc16); jpc3.add(jc17); jpc3.add(jbc3); // 向优惠券界面加入组件 mc.jp3.add(jc1); mc.jp3.add(jpc1); mc.jp3.add(jpc2); mc.jp3.add(jpc3); } @Override public void keyPressed(KeyEvent e) { this.getClass(); if (e.getKeyCode() == KeyEvent.VK_ENTER) { sum6 = Float.valueOf(jtfc1.getText()); // System.out.print("connect!!"); // 获得输入的商品编号 a = Integer.valueOf(jtfc.getText()); // 将输入处清空 jtfc.setText(""); if (a < 100|| a > 104) { //System.out.println("输入编号错误"); final Dialog dl= new Dialog(mc,null,true,null); dl.setBackground(Color.WHITE); dl.setBounds(300, 300,200, 100); JLabel jj= new JLabel("",JLabel.CENTER); jj.setText("输入错误！！请重新输入"); jj.setFont(new Font("楷书", Font.BOLD, 14)); dl.add(jj); dl.addWindowListener( new WindowAdapter() { public void windowClosing(WindowEvent e) { dl.setVisible(false); } }); dl.setVisible(true); //System.exit(-1); } else { int i = time++; // 连接数据库 try { Class.forName("com.mysql.jdbc.Driver"); Connection conn = DriverManager .getConnection("jdbc:mysql://localhost/goods?" + "user=root&password=root"); Statement stmt = conn.createStatement(); // 在文本中显示处商品信息 rs1 = stmt.executeQuery("select * from allgoods where id=" + a + ""); while (rs1.next()) { b = rs1.getInt("id"); // System.out.println(b); n = rs1.getString("name"); d[i] = rs1.getDouble("price"); dd[i] = rs1.getDouble("information"); } ss[1] = String.valueOf(b); ss[2] = String.valueOf(d[i]); ss[3] = String.valueOf(dd[i]); f[i] = Float.valueOf(ss[2]); ff[i] = Float.valueOf(ss[3]); ss[i] = " " + ss[1] + " " + n + " " + ss[2] + " " + ss[3] + "折"; jtac.setText(jtac.getText() + "\n" + ss[i]); // System.out.println("第"+i); // 在数据库中减一 //stmt.executeUpdate("update allgoods set amout=amout-1 where id="+a+""); // 计算商品最终价格 fff[i] = (float) (f[i] * ff[i] * 0.1); // System.out.println(ddd[i]); } catch (ClassNotFoundException ex) { ex.printStackTrace(); } catch (SQLException ex) { System.out.println("SQLException: " + ex.getMessage()); System.out.println("SQLState: " + ex.getSQLState()); System.out.println("VendorError: " + ex.getErrorCode()); } finally { try { if (stmt != null) { stmt.close(); stmt = null; } if (conn != null) { conn.close(); conn = null; } } catch (SQLException ex) { ex.printStackTrace(); } } } } } // 对键盘的监听处理方法 @Override public void keyReleased(KeyEvent e) { } @Override public void keyTyped(KeyEvent e) { } // 对按钮的监听处理方法 public void actionPerformed(ActionEvent e) { // 按下"完成"键 if (e.getActionCommand().equals("a")) { // 总价 for (int k = 0; k < f.length; k++) { sum1 += f[k]; } // 应收 for (int j = 0; j < fff.length; j++) { sum3 += fff[j]; } // 优惠的价钱 sum3 = sum3 - sum6; sum2 = sum1 - sum3; // 显示价格信息 sss[0] = String.valueOf(sum1); jc9.setText(sss[0]); sss[1] = String.valueOf(sum2