JTable 一个最好的例子

 
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.Vector;

import javax.swing.DefaultCellEditor;
import javax.swing.JButton;
import javax.swing.JComboBox;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.table.AbstractTableModel;
import javax.swing.table.TableColumnModel;

/**
* JTable的实用小例子
*
* @author 五斗米 <如转载请保留作者和出处>
* @blog <a href="http://blog.csdn.net/mq612">http://blog.csdn.net/mq612
*/

public class Test {
    private JFrame frame = null;

    private JTable table = null;

    private Table_Model model = null;

    private JScrollPane s_pan = null;

    private JButton button_1 = null,button_2 = null,button_3 = null;

    private JPanel pane = null;

    public Test() {
        frame = new JFrame("JTableTest");
        pane = new JPanel();
        button_1 = new JButton("清除数据");
        button_1.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                removeData();
            }
        });
        button_2 = new JButton("添加数据");
        button_2.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                addData();
            }
        });
        button_3 = new JButton("保存数据");
        button_3.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                saveData();
            }
        });
        pane.add(button_1);
        pane.add(button_2);
        pane.add(button_3);
        model = new Table_Model(20);
        table = new JTable(model);
        table.setBackground(Color.white);
        String[] age = { "16","17","18","19","20","21","22" };
        JComboBox com = new JComboBox(age);
        TableColumnModel tcm = table.getColumnModel();
        tcm.getColumn(3).setCellEditor(new DefaultCellEditor(com));
        tcm.getColumn(0).setPreferredWidth(50);
        tcm.getColumn(1).setPreferredWidth(100);
        tcm.getColumn(2).setPreferredWidth(50);

        s_pan = new JScrollPane(table);

        frame.getContentPane().add(s_pan,BorderLayout.CENTER);
        frame.getContentPane().add(pane,BorderLayout.NORTH);
        frame.setDefaultCloSEOperation(JFrame.EXIT_ON_CLOSE);
        frame.setSize(300,200);
        frame.setVisible(true);

    }

    private void addData() {
        model.addRow("李逵",true,"19");
        table.updateUI();
    }

    private void removeData() {
        model.removeRows(0,model.getRowCount());
        table.updateUI();
    }

    // 保存数据，暂时是将数据从控制台显示出来
    private void saveData() {
        int col = model.getColumnCount();
        int row = model.getRowCount();
        for (int i = 0; i < col; i++) {
            System.out.print(model.getColumnName(i) + "t");
        }
        System.out.print("rn");
        for (int i = 0; i < row; i++) {
            for (int j = 0; j < col; j++) {
                System.out.print(model.getValueAt(i,j) + "t");
            }
            System.out.print("rn");
        }
        System.out.println("------------------------------------");
    }

    public static void main(String args[]) {
        new Test();
        System.out
                .println(
"按下保存按钮将会把JTable中的内容显示出来rn------------------------------------");
    }

}

/**
* TableModel类，继承了AbstractTableModel
*
* @author 五斗米
*
*/
class Table_Model extends AbstractTableModel {

    private static final long serialVersionUID = -7495940408592595397L;

    private Vector content = null;

    private String[] title_name = { "ID","姓名","性别","年龄" };

    public Table_Model() {
        content = new Vector();
    }

    public Table_Model(int count) {
        content = new Vector(count);
    }

    public void addRow(String name,boolean sex,String age) {
        Vector v = new Vector(4);
        v.add(0,new Integer(content.size()));
        v.add(1,name);
        v.add(2,new Boolean(sex));
        v.add(3,age);
        content.add(v);
    }

    public void removeRow(int row) {
        content.remove(row);
    }

    public void removeRows(int row,int count) {
        for (int i = 0; i < count; i++) {
            if (content.size() > row) {
                content.remove(row);
            }
        }
    }

    /**
    * 让表格中某些值可修改，但需要setValueAt(Object value,int row,int col)方法配合才能使修改生效
    */
    public boolean isCellEditable(int rowIndex,int columnIndex) {
        if (columnIndex == 0) {
            return false;
        }
        return true;
    }

    /**
    * 使修改的内容生效
    */
    public void setValueAt(Object value,int col) {
        ((Vector) content.get(row)).remove(col);
        ((Vector) content.get(row)).add(col,value);
        this.fireTableCellUpdated(row,col);
    }

    public String getColumnName(int col) {
        return title_name[col];
    }

    public int getColumnCount() {
        return title_name.length;
    }

    public int getRowCount() {
        return content.size();
    }

    public Object getValueAt(int row,int col) {
        return ((Vector) content.get(row)).get(col);
    }

    /**
    * 返回数据类型
    */
    public Class getColumnClass(int col) {
        return getValueAt(0,col).getClass();
    }
}