multipledataclassframe2.java

jbuilder2006一书的所有源代码

package dbswing;

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

public class MultipleDataClassFrame2 extends JFrame implements ActionListener {
  JPanel contentPane;
  BorderLayout borderLayout1 = new BorderLayout();
  Database database1 = new Database();
  QueryDataSet queryDataSet1 = new QueryDataSet();
  TableScrollPane tableScrollPane1 = new TableScrollPane();
  JdbTable jdbTable1 = new JdbTable();
  JPanel jPanel1 = new JPanel();
  TableScrollPane tableScrollPane2 = new TableScrollPane();
  JPanel jPanel2 = new JPanel();
  JButton jButton1 = new JButton();
  JButton jButton2 = new JButton();
  JButton jButton3 = new JButton();
  JButton jButton4 = new JButton();
  JdbTree jdbTree1 = new JdbTree();

  public MultipleDataClassFrame2() {
    try {
      jbInit();
    }
    catch(Exception e) {
      e.printStackTrace();
    }
  }

  private void jbInit() throws Exception  {
    contentPane = (JPanel) this.getContentPane();
    contentPane.setLayout(borderLayout1);
    this.setSize(new Dimension(400, 300));
    this.setTitle("数据结构树和数据表格的实例");
    //建立与SQLServer的books数据库的联接
    database1.setConnection(new com.borland.dx.sql.dataset.ConnectionDescriptor(
        "jdbc:microsoft:sqlserver://bemyfriend:1433;DatabaseName=books", "sa",
        "", false, "com.microsoft.jdbc.sqlserver.SQLServerDriver"));
    //取得bookcategory数据表的记录
    queryDataSet1.setQuery(new com.borland.dx.sql.dataset.QueryDescriptor(
        database1, "select * from bookcategory", null, true, Load.ALL));
    //设置按钮的属性
    jButton1.setText("第一条");
    jButton2.setText("上一条");
    jButton3.setText("下一条");
    jButton4.setText("最后一条");
    jButton1.setActionCommand("first");
    jButton2.setActionCommand("prior");
    jButton3.setActionCommand("next");
    jButton4.setActionCommand("last");
    jButton1.addActionListener(this);
    jButton2.addActionListener(this);
    jButton3.addActionListener(this);
    jButton4.addActionListener(this);
    //设置表格的数据源
    jdbTable1.setDataSet(queryDataSet1);
    //创建一个根节点
    DefaultMutableTreeNode top = new DefaultMutableTreeNode("树根");
    //使用createNodes方法创建树的其它节点
    createNodes(top);
    //使用根节点创建树
    jdbTree1 = new JdbTree(top);
    //使根节点不可视
    jdbTree1.setRootVisible(false);
    //设置结构树的数据源和字段名
    jdbTree1.setDataSet(queryDataSet1);
    jdbTree1.setColumnName("categoryName");
    jPanel1.add(tableScrollPane2, null);
    jPanel2.add(jButton1, null);
    jPanel2.add(jButton2, null);
    jPanel2.add(jButton3, null);
    jPanel2.add(jButton4, null);
    tableScrollPane1.getViewport().add(jdbTable1, null);
    tableScrollPane2.setPreferredSize(new Dimension(200, 100));
    tableScrollPane2.getViewport().add(jdbTree1, null);
    contentPane.add(tableScrollPane1, BorderLayout.CENTER);
    contentPane.add(jPanel1, BorderLayout.NORTH);
    contentPane.add(jPanel2, BorderLayout.SOUTH);
  }

  protected void processWindowEvent(WindowEvent e) {
    if (e.getID() == WindowEvent.WINDOW_CLOSING) {
      System.exit(0);
    }
  }

  public void actionPerformed(ActionEvent e) {
    String actionComm = e.getActionCommand();
    if (actionComm.equals("first")) {
      //显示第1条记录
      queryDataSet1.first();
    }
    if (actionComm.equals("prior")) {
      //显示上1条记录
      queryDataSet1.prior();
    }
    if (actionComm.equals("next")) {
      //显示下1条记录
      queryDataSet1.next();
    }
    if (actionComm.equals("last")) {
      //显示最后1条记录
      queryDataSet1.last();
    }
  }

  //创建树枝的方法,主要使用DefaultMutableTreeNode类
  private void createNodes(DefaultMutableTreeNode top) {
    DefaultMutableTreeNode category = null;
    //树枝数组
    String[][] categoryCaption = {
        {"图书类别1", "图书类别1的描述"}
        , {"图书类别2", "图书类别2的描述"}
        , {"图书类别3", "图书类别3的描述"}
        , {"图书类别4", "图书类别4的描述"}
        , {"图书类别5", "图书类别5的描述"}
        , {"图书类别6", "图书类别6的描述"}
        , {"图书类别7", "图书类别7的描述"}
        , {"图书类别8", "图书类别8的描述"}
        , {"图书类别9", "图书类别9的描述"}
        , {"图书类别10", "图书类别10的描述"}
        , {"图书类别11", "图书类别11的描述"}
        , {"图书类别12", "图书类别12的描述"}
        , {"图书类别13", "图书类别13的描述"}
    };
    //创建树枝
    for (int i = 0; i < categoryCaption.length; ++i) {
      category = new DefaultMutableTreeNode(categoryCaption[i][0]);
      category.add(new DefaultMutableTreeNode(categoryCaption[i][1]));
      top.add(category);
    }
  }
}