/**
 * <p>Title: 以表格顯示數據庫查詢結果</p>
 * <p>Description: 第五章例子</p>
 * <p>Copyright: Copyright (c) 2006</p>
 * <p>Company: </p>
 * @author 蘇年樂
 * @version 1.0
 */

import java.sql.*;
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import java.util.*;

public class TableDisplay2 extends JFrame {
  //數據庫變量定義
  private JDBCAdapter adapter;

  //GUI變量定義
  private JTable table;
  private JTextArea inputQuery;
  private JButton submitQuery;

  public TableDisplay2() {
    //Form的標題
    super("輸入SQL語句，按提交按鈕查看結果。");
    //url中指定ODBC中設置的DSN名稱
    String url = "jdbc:odbc:Person";
    String driverName="sun.jdbc.odbc.JdbcOdbcDriver";
    String username = "";
    String password = "";

    adapter=new JDBCAdapter(url,driverName,username,password);

    //如果數據庫連接成功，則建立GUI
    //SQL語句
    String test = "SELECT * FROM Person";
    inputQuery = new JTextArea(test, 4, 30);
    submitQuery = new JButton("查詢");
    //Button事件
    submitQuery.addActionListener(
        new ActionListener() {
      public void actionPerformed(ActionEvent e) {
        executeQuery();
      }
    }
    );

    JPanel topPanel = new JPanel();
    topPanel.setLayout(new BorderLayout());
    //將"輸入查詢"編輯框布置到 "CENTER"
    topPanel.add(new JScrollPane(inputQuery), BorderLayout.CENTER);
    //將"提交查詢"按鈕布置到 "SOUTH"
    topPanel.add(submitQuery, BorderLayout.SOUTH);
    table = new JTable();
    Container c = getContentPane();
    c.setLayout(new BorderLayout());
    //將"topPanel"編輯框布置到 "NORTH"
    c.add(topPanel, BorderLayout.NORTH);
    //將"table"編輯框布置到 "CENTER"
    c.add(table, BorderLayout.CENTER);
    executeQuery();
    setSize(500, 300);
    //顯示Form
    show();
  }

  private void executeQuery(){
    adapter.executeQuery(inputQuery.getText());
  }

  public void shutDown() {
    try {
      //斷開數據庫連接
      connection.close();
    }
    catch (SQLException e) {
      System.err.println("無法斷開連接");
      e.printStackTrace();
    }
  }

  public static void main(String args[]) {
    final TableDisplay2 app =new TableDisplay2();
    app.addWindowListener(
        new WindowAdapter() {
      public void windowClosing(WindowEvent e) {
        app.shutDown();
        System.exit(0);
      }
    }
    );
  }
}