JTable 一个最好的例子详解编程语言

  
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("//r//n"); 
        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("//r//n"); 
        } 
        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//r//n------------------------------------"); 
    } 
 
} 
 
/** 
* 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 row, 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(); 
    } 
}