booklist.java~2~

图书馆管理系统 运用简单的Java语言与SQLSERVER2000数据库 开发的一个图书管理系统

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

public class BookList
    extends JFrame
    implements ActionListener {
  DataBaseManager db = new DataBaseManager();
  ResultSet rs;
  Container c;
  JPanel panel1, panel2, panel3;
  JLabel BookNameLabel, AuthorLabel, PressLabel;
  JTextField BookNameTextField, AuthorTextField,
      PressTextField;
  JButton SearchBtn, ExitBtn;
  JTable table = null;
  DefaultTableModel defaultModel = null;
  public BookList() {
    super("书籍信息一览！");
    c = getContentPane();
    c.setLayout(new BorderLayout());
    BookNameLabel = new JLabel("名称", JLabel.CENTER);
    AuthorLabel = new JLabel("作者", JLabel.CENTER);
    PressLabel = new JLabel("出版社", JLabel.CENTER);
    BookNameTextField = new JTextField(15);
    AuthorTextField = new JTextField(15);
    PressTextField = new JTextField(15);
    SearchBtn = new JButton("查询");
    SearchBtn.addActionListener(this);
    ExitBtn = new JButton("退出");
    ExitBtn.addActionListener(this);
    panel1 = new JPanel();
    panel3 = new JPanel();
    panel1.add(BookNameLabel);
    panel1.add(BookNameTextField);
    panel1.add(AuthorLabel);
    panel1.add(AuthorTextField);
    panel3.add(PressLabel);
    panel3.add(PressTextField);
    panel3.add(SearchBtn);
    panel3.add(ExitBtn);
    String[] name = {
        "书名", "出版社", "作者", "地址", "出版日期", "定价", "评论"};
    String[][] data = new String[0][0];
    defaultModel = new DefaultTableModel(data, name);
    table = new JTable(defaultModel);
    table.setPreferredScrollableViewportSize(new Dimension(400, 80));
    JScrollPane s = new JScrollPane(table);
    panel2 = new JPanel();
    panel2.add(s);
    c.add(panel1, BorderLayout.NORTH);
    c.add(panel3, BorderLayout.CENTER);
    c.add(panel2, BorderLayout.SOUTH);
  }

  public void actionPerformed(ActionEvent e) {
    if (e.getSource() == SearchBtn) {
      String strSQL =
          "select bookName,press,author,address,pressDate,price,com from books";
      String strSql = null;
      if (BookNameTextField.getText().trim().equals("") &&
          AuthorTextField.getText().trim().equals("") &&
          PressTextField.getText().trim().equals("")) {
        strSql = strSQL;
      }
      else if (BookNameTextField.getText().trim().equals("") &&
               AuthorTextField.getText().trim().equals("")) {
        strSql = strSQL + " where press='" + PressTextField.getText().trim() +
            "'";
      }
      else if (BookNameTextField.getText().trim().equals("") &&
               PressTextField.getText().trim().equals("")) {
        strSql = strSQL + " where author='" + AuthorTextField.getText().trim() +
            "'";
      }
      else if (AuthorTextField.getText().trim().equals("") &&
               PressTextField.getText().trim().equals("")) {
        strSql = strSQL + " where bookName='" +
            BookNameTextField.getText().trim() + "'";
      }
      else if (BookNameTextField.getText().trim().equals("")) {
        strSql = strSQL + " where author='" + AuthorTextField.getText().trim() +
            "'and press='" + PressTextField.getText().trim() + "'";
      }
      else if (AuthorTextField.getText().trim().equals("")) {
        strSql = strSQL + " where bookName='" +
            BookNameTextField.getText().trim() +
            "'and press='" + PressTextField.getText().trim() + "'";
      }
      else if (PressTextField.getText().trim().equals("")) {
        strSql = strSQL + " where bookname='" +
            BookNameTextField.getText().trim() +
            "'and author='" + AuthorTextField.getText().trim() + "'";
      }
      else {
        strSql = strSQL + " where bookname='" +
            BookNameTextField.getText().trim() +
            "'and author='" + AuthorTextField.getText().trim() + "'and press='" +
            PressTextField.getText().trim() + "'";
      }
      try {
        //首先要删除table中的数据先：
        int rowCount = defaultModel.getRowCount() - 1; //取得table中的数据行；
        int j = rowCount;
        for (int i = 0; i <= rowCount; i++) {
          defaultModel.removeRow(j); //删除rowCount行的数据；
          defaultModel.setRowCount(j); //重新设置行数；
          j = j - 1;
        }
        rs = db.getResult(strSql);
        while (rs.next()) {
          Vector data = new Vector();
          data.addElement(rs.getString(1));
          data.addElement(rs.getString(2));
          data.addElement(rs.getString(3));
          data.addElement(rs.getString(4));
          data.addElement(rs.getString(5));
          data.addElement(rs.getString(6));
          data.addElement(rs.getString(7));
          defaultModel.addRow(data);
        }
        table.revalidate();
      }
      catch (SQLException sqle) {
        System.out.println(sqle.toString());
      }
      catch (Exception ex) {
        System.out.println(ex.toString());
      }
    }
    else if (e.getSource() == ExitBtn) {
      db.closeConnection();
      this.dispose();
    }
  }
}