inforframe.java~1~

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 inforinterface;

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import com.borland.dx.dataset.*;
import com.borland.dbswing.*;

public class InforFrame extends JFrame {
  JPanel contentPane;
  //创建数据文件类
  TextDataFile categoryDataFile = new TextDataFile();
  TextDataFile productDataFile = new TextDataFile();
  //创建数据类
  TableDataSet categoryDataSet = new TableDataSet();
  TableDataSet productDataSet = new TableDataSet();
  //创建category表的列对象
  Column id = new Column();
  Column name = new Column();
  Column description = new Column();
  //创建product表的列对象
  Column isUsed = new Column();
  Column minUnitsInStock = new Column();
  Column unitsOnOrder = new Column();
  Column unitsInStock = new Column();
  Column price = new Column();
  Column quantity = new Column();
  Column categoryId = new Column();
  Column productName = new Column();
  Column productId = new Column();
  JdbTable categoryDBTable = new JdbTable();
  JdbTable productDBTable = new JdbTable();
  TableScrollPane categoryTableScrollPane = new TableScrollPane();
  TableScrollPane productTableScrollPane = new TableScrollPane();
  JSplitPane jSplitPane1 = new JSplitPane();
  BorderLayout borderLayout1 = new BorderLayout();

  public InforFrame() {
    try {
      jbInit();
    }
    catch(Exception e) {
      e.printStackTrace();
    }
  }
  private void jbInit() throws Exception  {
    //设置窗口面板的布局、大小与标题
    contentPane = (JPanel) this.getContentPane();
    contentPane.setLayout(borderLayout1);
    this.setSize(new Dimension(685, 530));
    this.setTitle("信息浏览窗口");
    //设置数据文件
    categoryDataFile.setFileName("category.txt");
    productDataFile.setFileName("product.txt");
    //关联数据类与数据文件
    categoryDataSet.setDataFile(categoryDataFile);
    productDataSet.setDataFile(productDataFile);
    //定义category数据表的字段
    id.setColumnName("id");                             //定义字段名
    id.setCaption("类别ID");                             //定义字段的显示名字
    id.setDataType(com.borland.dx.dataset.Variant.INT); //定义字段的数据类型
    name.setColumnName("name");
    name.setCaption("类别名字");
    name.setDataType(com.borland.dx.dataset.Variant.STRING);
    description.setColumnName("description");
    description.setCaption("描述");
    description.setDataType(com.borland.dx.dataset.Variant.STRING);
    description.setWidth(30);                            //定义字段的显示宽度
    //为category数据类加入字段
    categoryDataSet.setColumns(new Column[] {id, name, description});
    //定义product数据表的字段
    productId.setColumnName("id");
    productId.setCaption("产品ID");
    productId.setDataType(com.borland.dx.dataset.Variant.INT);
    productName.setColumnName("name");
    productName.setCaption("产品名称");
    productName.setDataType(com.borland.dx.dataset.Variant.STRING);
    categoryId.setColumnName("categoryId");
    categoryId.setCaption("类别ID");
    categoryId.setDataType(com.borland.dx.dataset.Variant.INT);
    price.setColumnName("price");
    price.setCaption("单价");
    price.setDataType(com.borland.dx.dataset.Variant.DOUBLE);
    quantity.setColumnName("quantity");
    quantity.setCaption("单位数量");
    quantity.setDataType(com.borland.dx.dataset.Variant.STRING);
    unitsInStock.setColumnName("unitsInStock");
    unitsInStock.setCaption("库存量");
    unitsInStock.setDataType(com.borland.dx.dataset.Variant.INT);
    unitsOnOrder.setColumnName("unitsOnOrder");
    unitsOnOrder.setCaption("订购量");
    unitsOnOrder.setDataType(com.borland.dx.dataset.Variant.INT);
    minUnitsInStock.setColumnName("minUnitsInStock");
    minUnitsInStock.setCaption("最小库存量");
    minUnitsInStock.setDataType(com.borland.dx.dataset.Variant.INT);
    isUsed.setColumnName("isUsed");
    isUsed.setCaption("是否可用");
    isUsed.setDataType(com.borland.dx.dataset.Variant.INT);
    //为product数据类加入字段
    productDataSet.setColumns(new Column[] {productId, productName, categoryId,
                              quantity, price, unitsInStock, unitsOnOrder,
                              minUnitsInStock, isUsed
                              });
    //定义category与product数据表的一对多关系
    productDataSet.setMasterLink(new com.borland.dx.dataset.MasterLinkDescriptor(categoryDataSet, new String[] {"id"}, new String[] {"categoryId"}, true, false, false));
    //设置数据表格的数据源
    categoryDBTable.setDataSet(categoryDataSet);
    productDBTable.setDataSet(productDataSet);
    //将数据表格加入滚动框
    categoryTableScrollPane.getViewport().add(categoryDBTable, null);
    productTableScrollPane.getViewport().add(productDBTable, null);
    //定义分隔面板的分隔条大小
    jSplitPane1.setDividerSize(6);
    //定义分隔面板的分隔条的位置
    jSplitPane1.setDividerLocation(180);
    //将分隔面板定义为上下方向
    jSplitPane1.setOrientation(JSplitPane.VERTICAL_SPLIT);
    //为分隔面板的顶部加入category滚动框
    jSplitPane1.add(categoryTableScrollPane, JSplitPane.TOP);
    //为分隔面板的底部加入product滚动框
    jSplitPane1.add(productTableScrollPane, JSplitPane.BOTTOM);
    //为窗口面板加入分隔面板
    contentPane.add(jSplitPane1, BorderLayout.CENTER);
  }
  protected void processWindowEvent(WindowEvent e) {
    if (e.getID() == WindowEvent.WINDOW_CLOSING) {
      System.exit(0);
    }
  }
}