14.64.2 表查询 Filter table by the text in a TextField

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.JLabel;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.JTextField;
import javax.swing.RowFilter;
import javax.swing.table.DefaultTableModel;
import javax.swing.table.TableModel;
import javax.swing.table.TableRowSorter;

public class RegexTable {

public static void main(String[] args) {
JFrame frame = new JFrame("Regexing JTable");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
Object rows[][] = { { "A", "About", 44.36 }, { "B", "Boy", 44.84 }, { "C", "Cat", 463.63 },
{ "D", "Day", 27.14 }, { "E", "Eat", 44.57 }, { "F", "Fail", 23.15 },
{ "G", "好", 4.40 }, { "H", "Hot", 24.96 }, { "I", "Ivey", 5.45 },
{ "J", "Jack", 49.54 }, { "K", "Kids", 280.00 } };
String columns[] = { "符号", "名字", "价格" };
TableModel model = new DefaultTableModel(rows, columns) {
public Class getColumnClass(int column) {
Class returnValue;
if ((column >= 0) && (column < getColumnCount())) {
returnValue = getValueAt(0, column).getClass();
} else {
returnValue = Object.class;
}
return returnValue;
}
};

final JTable table = new JTable(model);
final TableRowSorter<TableModel> sorter = new TableRowSorter<TableModel>(model);
table.setRowSorter(sorter);//设置为sorter此方法清除该选择并重置所有可变行高度。
JScrollPane pane = new JScrollPane(table);
frame.add(pane, BorderLayout.CENTER);

JPanel panel = new JPanel(new BorderLayout());
JLabel label = new JLabel("过滤");
panel.add(label, BorderLayout.WEST);
final JTextField filterText = new JTextField("A");
panel.add(filterText, BorderLayout.CENTER);
frame.add(panel, BorderLayout.NORTH);

JButton button = new JButton("过滤");
button.addActionListener(new ActionListener(){

@Override
public void actionPerformed(ActionEvent e) {
// TODO Auto-generated method stub
String text = filterText.getText();//从文本框里得到的值给text
if(text.length() == 0){//如果没有数据
//setRowFilter()设置用于确定哪些行（如果有）应该在视图中隐藏的过滤器。过滤器在排序之前应用。
sorter.setRowFilter(null);//过滤为空，即显示所有行数据
}else{
sorter.setRowFilter(RowFilter.regexFilter(text));
/**
* 1.RowFilter 用于从模型中过滤条目，使得这些条目不会在视图中显示。
* 2.regexFilter返回一个 RowFilter，它使用正则表达式确定要包含哪些条目。
* 3.只包含至少有一个匹配值的条目，这里包含了text这个条目
*/
}
}
});
frame.add(button, BorderLayout.SOUTH);
frame.setSize(300, 250);
frame.setVisible(true);
}

}