使用DefaultModel实现动态表格

package _17;

import java.awt.BorderLayout;

import java.awt.event.ActionEvent;

import java.awt.event.ActionListener;

import javax.swing.JButton;

import javax.swing.JFrame;

import javax.swing.JPanel;

import javax.swing.JScrollPane;

import javax.swing.JTable;

import javax.swing.table.DefaultTableModel;

import javax.swing.table.TableColumn;

import javax.swing.table.TableColumnModel;

public class AddAndRemoveCells extends JFrame implements ActionListener {

private JTable table;

private DefaultTableModel defaultModel;

public AddAndRemoveCells() {

// 表头与初始数据

String[] name = { "First Name", "Last Name", "Sport" };

Object[][] data = {

{ "Kathy", "Smith", "Snowboarding" },

{ "John", "Doe", "Rowing" },

{ "Sue", "Black", "Knitting" },

{ "Jane", "White", "Speed reading" },

{ "Joe", "Brown", "Pool" }

};

// 初始化表格模型与表格

defaultModel = new DefaultTableModel(data, name);

table = new JTable(defaultModel);

JScrollPane scrollPan = new JScrollPane(table);

// 创建功能按钮

JButton button1 = new JButton("增加行");

JButton button2 = new JButton("增加列");

JButton button3 = new JButton("删除行");

JButton button4 = new JButton("删除列");

// 按钮面板布局

JPanel panel = new JPanel();

panel.add(button1);

panel.add(button2);

panel.add(button3);

panel.add(button4);

// 绑定事件监听器

button1.addActionListener(this);

button2.addActionListener(this);

button3.addActionListener(this);

button4.addActionListener(this);

// 窗口布局：按钮面板在北部，表格在中部

add(panel, BorderLayout.NORTH);

add(scrollPan, BorderLayout.CENTER);

}

@Override

public void actionPerformed(ActionEvent e) {

String cmd = e.getActionCommand();

// 增加列

if (cmd.equals("增加列")) {

defaultModel.addColumn("新增列");

}

// 增加行

if (cmd.equals("增加行")) {

Object[] newRow = new Object[defaultModel.getColumnCount()];

defaultModel.addRow(newRow);

}

// 删除列

if (cmd.equals("删除列")) {

int columnCount = defaultModel.getColumnCount() - 1;

if (columnCount >= 0) {

TableColumnModel columnModel = table.getColumnModel();

TableColumn tableColumn = columnModel.getColumn(columnCount);

columnModel.removeColumn(tableColumn);

defaultModel.setColumnCount(columnCount);

}

}

// 删除行

if (cmd.equals("删除行")) {

int rowCount = defaultModel.getRowCount() - 1;

if (rowCount >= 0) {

defaultModel.removeRow(rowCount);

defaultModel.setRowCount(rowCount);

}

}

// 刷新表格布局，确保修改生效

table.revalidate();

}

// 主方法：启动程序

public static void main(String args[]) {

AddAndRemoveCells frame = new AddAndRemoveCells();

frame.setSize(500, 300);

frame.setTitle("动态表格");

frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

frame.setVisible(true);

}

}