JDK6的新特性之十三:JTable的排序和过滤

原来的JTable基本上是只能显示数据,在JDK6新增了对JTable的排序和过滤功能,下面代码演示了这两个功能

/**
 * @author chinajash
 */
public class JTableTester {
    static String data[][] = {
        {"China","Beijing","Chinese"},
        {"America","Washington","English"},
        {"Korea","Seoul","Korean"},
        {"Japan","Tokyo","Japanese"},
        {"France","Paris","French"},
        {"England","London","English"},
        {"Germany","Berlin","German"},
    };
    static String titles[] = {"Country","Capital","Language"};
    public static void main(String[] args) {        
        DefaultTableModel m = new DefaultTableModel(data,titles);
        JTable t = new JTable(m);
        final TableRowSorter sorter = new TableRowSorter(m); 
        t.setRowSorter(sorter); //为JTable设置排序器
        
        JScrollPane sPane = new JScrollPane();
        sPane.setViewportView(t);
        
        JPanel p = new JPanel();
        p.setLayout(new BoxLayout(p,BoxLayout.X_AXIS));
        JLabel l = new JLabel("Criteria:");
        final JTextField tf = new JTextField();
        JButton b = new JButton("Do Filter");
        p.add(l);
        p.add(tf);
        p.add(b);
        b.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                if(tf.getText().length()==0){
                    sorter.setRowFilter(null);
                }else{
                    sorter.setRowFilter(RowFilter.regexFilter(tf.getText()));//为JTable设置基于正则表达式的过滤条件
                }
            }
        });
        
        JFrame f = new JFrame("JTable Sorting and Filtering");
        f.getContentPane().add(sPane,BorderLayout.CENTER);        
        f.getContentPane().add(p,BorderLayout.SOUTH);
        f.setSize(400,300);
        f.setVisible(true);
    }

运行上面程序,单击JTable的某一个title,这个title对应的列就会按照升序/降序重新排列;在下面的Criteria文本框中输入"ese",点击"Do Filter"按钮,JTable将只显示带有"ese"字符串的行,也就是China和Japan两行,如果文本框里面什么都没有,点击"Do Filter"按钮,这时JTable会显示所有的行。
 

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