cartviewframe.java

购物车模块实例。购物车模块可以浏览商品类别；可以根据商品类别浏览商品信息；可以购买商品；可以查看购物车的商品；可以修改购买商品的数量和删除购买的商品。

package cartinterface;

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.table.*;
import data.*;
import java.util.*;

public class CartViewFrame extends JFrame implements ActionListener {
  JPanel contentPane;
  BorderLayout borderLayout1 = new BorderLayout();
  JScrollPane cartTableScrollPane = new JScrollPane();
  JPanel buttonPanel = new JPanel();
  JButton jButton1 = new JButton();
  JButton jButton2 = new JButton();
  JButton jButton3 = new JButton();
  JButton jButton4 = new JButton();
  //创建商品表格
  JTable cartTable = null;
  //创建商品表格的模块类
  CartTableModel cartTableModel= new CartTableModel();
  //创建字体类
  Font dialog13 = new java.awt.Font("Dialog", 0, 13);
  //创建购物车类
  Cart cart = null;

  public CartViewFrame(Cart cart) {
    //取得传入的购物车对象
    this.cart = cart;
    try {
      jbInit();
    }
    catch(Exception e) {
      e.printStackTrace();
    }
  }

  private void jbInit() throws Exception  {
    contentPane = (JPanel) this.getContentPane();
    contentPane.setLayout(borderLayout1);
    this.setSize(new Dimension(500, 400));
    this.setTitle("购物车查看窗口");
    //设置按钮的属性
    jButton1.setText("修改购物车的数量");
    jButton1.setActionCommand("updateQuantity");
    jButton1.setFont(dialog13);
    jButton1.addActionListener(this);
    jButton2.setText("删除选择商品");
    jButton2.setActionCommand("delete");
    jButton2.setFont(dialog13);
    jButton2.addActionListener(this);
    jButton3.setText("重新显示购物车的商品");
    jButton3.setActionCommand("reShow");
    jButton3.setFont(dialog13);
    jButton3.addActionListener(this);
    jButton4.setText("退出");
    jButton4.setActionCommand("exit");
    jButton4.setFont(dialog13);
    jButton4.addActionListener(this);
    buttonPanel.add(jButton1, null);
    buttonPanel.add(jButton2, null);
    buttonPanel.add(jButton3, null);
    contentPane.add(buttonPanel, BorderLayout.NORTH);
    contentPane.add(cartTableScrollPane, BorderLayout.CENTER);
    //显示购物车的商品
    showTable();
  }
  //显示购物车的商品
  public void showTable(){
    //取得购物车的商品数组
    Object[][] goodsObjs = cart.getGoodsobjs();
    //设置表格数据类的数组
    cartTableModel.setData(goodsObjs);
    //创建购物车的商品表格
    cartTable = new JTable(cartTableModel);
    //设置表格的字体
    cartTable.setFont(dialog13);
    //使表格的选择范围为一个单元格
    cartTable.setRowSelectionAllowed(false);
    cartTableScrollPane.getViewport().add(cartTable, null);
  }
  protected void processWindowEvent(WindowEvent e) {
    if (e.getID() == WindowEvent.WINDOW_CLOSING) {
      //单击退出按钮时隐藏该窗口
      this.setVisible(false);
    }
  }
  //按钮单击事件
  public void actionPerformed(ActionEvent e) {
    //取得按钮的动作字符串
    String actionCommand = e.getActionCommand().trim();
    //取得表格的数组
    Object[][] goodsObjs = cartTableModel.getData();
    //单击修改购物车的数量按钮的处理代码
    if (actionCommand.equals("updateQuantity")) {
      //创建商品集合
      Hashtable goods = new Hashtable();
      for(int i = 0; i < (goodsObjs.length -1); i++){
        if(((Boolean)goodsObjs[i][4]).booleanValue()){
          //检查商品数量是否是整字
          if(!(new NumberVerify().verifyNum(goodsObjs[i][5].toString()))){
            JOptionPane.showMessageDialog(null, goodsObjs[i][1]
                                          + "的购买数量需要输入整数并且大于等于0.");
            //不再执行其它代码
            return;
          }
          goods.put(goodsObjs[i][0], goodsObjs[i][1] + "@@" + goodsObjs[i][2]
                    + "@@" + goodsObjs[i][3] + "@@" + goodsObjs[i][5]);
        }
      }
      //更新购买商品的数量
      cart.updateGoods(goods);
      //重新显示表格内容
      showTable();
    }else if(actionCommand.equals("delete")){
      Collection goodsId = new ArrayList();
      for(int i = 0; i < (goodsObjs.length -1); i++){
        if(((Boolean)goodsObjs[i][4]).booleanValue()){
          goodsId.add(goodsObjs[i][0]);
        }
      }
      //删除购物车的商品
      cart.removeGoods(goodsId);
      //重新显示表格内容
      showTable();
    }else if(actionCommand.equals("reShow")){
      //重新显示表格内容
      showTable();
    }else if(actionCommand.equals("exit")){
      //单击退出按钮时隐藏该窗口
      this.setVisible(false);
    }
  }
}