基于Java的编程学习之路：Java、JavaScript、HTML、CSS多语言融合教程

package org.example.Page; import org.example.mapper.BookMapper; import org.example.mapper.BorrowMapper; import javax.swing.*; import javax.swing.event.ChangeEvent; import javax.swing.event.TableModelEvent; import javax.swing.event.TableModelListener; import javax.swing.table.DefaultTableModel; import javax.swing.table.TableCellRenderer; import javax.swing.table.TableModel; import java.awt.*; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import java.sql.SQLException; public class BookPage extends JFrame implements TableModelListener { private JScrollPane jsp = new JScrollPane(); private BookMapper bookMapper = new BookMapper(); private BorrowMapper borrowMapper = new BorrowMapper(); private String[] columnNames = { "书号", "书名", "作者", "类型", "价格", "库存", "状态", "操作1", "操作2", "操作3"}; Object[][] data = { }; private JTable table; public BookPage() throws SQLException { //获取所有图书 data = bookMapper.selectAllBook(); table = new JTable(new DefaultTableModel(data, columnNames)); //设置列的宽度,这个灵活变动，不一定需要 // TableColumn column = null; // for (int i = 0; i < 5; i++) { // column = table.getColumnModel().getColumn(i); // if (i == 2) { // column.setPreferredWidth(400); //third column is bigger // } else { // column.setPreferredWidth(50); // } // } setTitle("显示所有图书"); setSize(1300, 1000); getContentPane().setBackground(Color.DARK_GRAY); setResizable(false); // 不可改变窗口大小 // 获取屏幕大小和当前frame的大小 Dimension thisScreen = Toolkit.getDefaultToolkit().getScreenSize(); Dimension thisFrame = this.getSize(); // 使启动窗口位于屏幕的正中心 setLocation((thisScreen.width - thisFrame.width) / 2, (thisScreen.height - thisFrame.height) / 2); // 设置单击窗口的【关闭】按钮时将发生相应的动作 setDefaultCloseOperation(HIDE_ON_CLOSE); setLocationRelativeTo(null); table.setForeground(Color.BLACK); // 设置可见视图的接口 jsp.setViewportView(table); // 定义表格 宽500，高度400 jsp.setPreferredSize(new Dimension(500, 400)); // 设置横向和垂直滚动条可见 jsp.setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_ALWAYS); jsp.setHorizontalScrollBarPolicy(JScrollPane.HORIZONTAL_SCROLLBAR_ALWAYS); this.setLayout(new BorderLayout()); this.add(jsp); //添加监听时间 table.getModel().addTableModelListener(this); table.getColumnModel().getColumn(7).setCellRenderer(new TableCellRendererButton()); table.getColumnModel().getColumn(7).setCellEditor(new TableCellEditorButton(table)); JScrollPane scrollPane = new JScrollPane(table); this.add(scrollPane); table.getColumnModel().getColumn(8).setCellRenderer(new TableCellRendererButton1()); table.getColumnModel().getColumn(8).setCellEditor(new TableCellEditorButton1(table)); JScrollPane scrollPane1 = new JScrollPane(table); this.add(scrollPane1); table.getColumnModel().getColumn(9).setCellRenderer(new TableCellRendererButton2()); table.getColumnModel().getColumn(9).setCellEditor(new TableCellEditorButton2()); JScrollPane scrollPane2 = new JScrollPane(table); this.add(scrollPane2); setVisible(true); } //数据改变监听器 public void tableChanged(TableModelEvent e) { int row = e.getFirstRow(); int column = e.getColumn(); TableModel model = (TableModel) e.getSource(); // for (int i = 0; i < 6; i++) { // Object data = model.getValueAt(row, i); //// System.out.println(data); // } } //删除按钮监听器 class TableCellRendererButton implements TableCellRenderer { private JPanel panel; private JButton button; public TableCellRendererButton() { this.initButton(); this.initPanel(); // 添加按钮。 this.panel.add(this.button); } private void initButton() { this.button = new JButton("删除"); // 设置按钮的大小及位置。 this.button.setBounds(15, 0, 80, 15); // 在渲染器里边添加按钮的事件是不会触发的 // this.button.addActionListener(new ActionListener() // { // // public void actionPerformed(ActionEvent e) // { // // TODO Auto-generated method stub // } // }); } private void initPanel() { this.panel = new JPanel(); // panel使用绝对定位，这样button就不会充满整个单元格。 this.panel.setLayout(null); } public Component getTableCellRendererComponent(JTable table, Object value, boolean isSelected, boolean hasFocus, int row, int column) { // 只为按钮赋值即可。也可以作其它操作，如绘背景等。 this.button.setText("删除"); return this.panel; } } class TableCellEditorButton extends DefaultCellEditor { /** * serialVersionUID */ private static final long serialVersionUID = -6546334664166791132L; private JPanel panel; private JButton button; private JTable table1; public TableCellEditorButton(JTable _table1) { // DefautlCellEditor有此构造器，需要传入一个，但这个不会使用到，直接new一个即可。 super(new JTextField()); table1 = _table1; // 设置点击几次激活编辑。 this.setClickCountToStart(1); this.initButton(); this.initPanel(); // 添加按钮。 this.panel.add(this.button); } private void initButton() { this.button = new JButton("删除"); // 设置按钮的大小及位置。 this.button.setBounds(15, 0, 80, 15); // 为按钮添加事件。这里只能添加ActionListner事件，Mouse事件无效。 this.button.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) { JButton btn = (JButton)(e.getSource()); ChangeEvent ce = new ChangeEvent(btn); table1.editingStopped(ce); int row = table1.getSelectedRow(); TableModel model = (table1.getModel()); Integer bookId = (Integer) model.getValueAt(row, 0); ((DefaultTableModel) model).removeRow(table1.getSelectedRow()); //在这里删除数据库中的数据 //获取bookId //根据id删除数据 try { new BookMapper().deleteBookById(bookId); } catch (SQLException ex) { throw new RuntimeException(ex); } } }); } private void initPanel() { this.panel = new JPanel(); // panel使用绝对定位，这样button就不会充满整个单元格。 this.panel.setLayout(null); } /** * 这里重写父类的编辑方法，返回一个JPanel对象即可（也可以直接返回一个Button对象，但是那样会填充满�