import java.awt.EventQueue;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;
import javax.swing.JOptionPane;
import javax.swing.JScrollPane;
import javax.swing.RowFilter;
import javax.swing.table.DefaultTableModel;
import javax.swing.table.TableRowSorter;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;
public class My extends javax.swing.JFrame {
DefaultTableModel model;
Connection connect;
Statement s;
ResultSet rst;
String expr;
final TableRowSorter<DefaultTableModel> sorter;
public My() {
initComponents();
model = (DefaultTableModel)jTable1.getModel();
sorter = new TableRowSorter<DefaultTableModel> (model);
try {
Class.forName("com.mysql.jdbc.Driver");
connect = DriverManager.getConnection("jdbc:mysql://localhost/SORTS","root",null);
s = connect.createStatement();
String sql = "SELECT * FROM member";
ResultSet rec = s.executeQuery(sql);
int row = 0;
while((rec!=null) && (rec.next()))
{
model.addRow(new Object[0]);
model.setValueAt(rec.getString("memberShipNo"), row, 0);
model.setValueAt(rec.getString("name"), row, 1);
model.setValueAt(rec.getString("workingStation"), row, 2);
model.setValueAt(rec.getString("address"), row, 3);
model.setValueAt(rec.getString("teleNo"), row, 4);
model.setValueAt(rec.getString("email"), row, 5);
row++;
}
rec.close();
} catch (Exception e) {
JOptionPane.showMessageDialog(null, e.getMessage());
e.printStackTrace();
}
try {
if(s != null) {
s.close();
connect.close();
}
} catch (SQLException e) {
e.printStackTrace();
}
jTable1.setRowSorter(sorter);
}
@SuppressWarnings("unchecked")
private void initComponents() {
jScrollPane1 = new javax.swing.JScrollPane();
System.out.println("3");
jTable1 = new javax.swing.JTable();
jButton1 = new javax.swing.JButton();
jTextField1 = new javax.swing.JTextField();
jPanel1 = new javax.swing.JPanel();
setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
System.out.println("4");
jTable1.setModel(new javax.swing.table.DefaultTableModel(
new Object [][] {
},
new String [] {
"Title 1", "Title 2", "Title 3", "Title 4", "Title 5", "Title 6"
}
) {
Class[] types = new Class [] {
java.lang.String.class, java.lang.String.class, java.lang.String.class, java.lang.String.class, java.lang.Object.class, java.lang.Object.class
};
public Class getColumnClass(int columnIndex) {
return types [columnIndex];
}
});
System.out.println("5");
System.out.println("2");
jScrollPane1.setViewportView(jTable1);
System.out.println("7");
jButton1.setText("jButton1");
jButton1.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jButton1ActionPerformed(evt);
}
});
jTextField1.setText(" ");
jTextField1.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
jTextField1ActionPerformed(evt);
}
});
javax.swing.GroupLayout jPanel1Layout = new javax.swing.GroupLayout(jPanel1);
jPanel1.setLayout(jPanel1Layout);
jPanel1Layout.setHorizontalGroup(
jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGap(0, 100, Short.MAX_VALUE)
);
jPanel1Layout.setVerticalGroup(
jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGap(0, 100, Short.MAX_VALUE)
);
javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
getContentPane().setLayout(layout);
layout.setHorizontalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addComponent(jScrollPane1, javax.swing.GroupLayout.PREFERRED_SIZE, 375, javax.swing.GroupLayout.PREFERRED_SIZE)
.addGap(0, 25, Short.MAX_VALUE))
.addGroup(javax.swing.GroupLayout.Alignment.TRAILING, layout.createSequentialGroup()
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addGap(47, 47, 47)
.addComponent(jTextField1, javax.swing.GroupLayout.PREFERRED_SIZE, 125, javax.swing.GroupLayout.PREFERRED_SIZE)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED, javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
.addGroup(javax.swing.GroupLayout.Alignment.TRAILING, layout.createSequentialGroup()
.addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
.addComponent(jPanel1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
.addGap(18, 18, 18)))
.addComponent(jButton1)
.addGap(111, 111, 111))
);
layout.setVerticalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addComponent(jScrollPane1, javax.swing.GroupLayout.PREFERRED_SIZE, 143, javax.swing.GroupLayout.PREFERRED_SIZE)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addGap(60, 60, 60)
.addComponent(jButton1))
.addGroup(layout.createSequentialGroup()
.addGap(51, 51, 51)
.addComponent(jTextField1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addComponent(jPanel1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)))
.addGap(0, 11, Short.MAX_VALUE))
);
pack();
}
private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {
if(evt.getSource()==jButton1){
expr = jTextField1.getText();
filter();
sorter.setSortKeys(null);
jTextField1.setText("");
}
}
private void jTextField1ActionPerformed(java.awt.event.ActionEvent evt) {
}
protected void filter() {
sorter.setRowFilter(RowFilter.regexFilter("^(?i)"+expr));
}
try {
for (javax.swing.UIManager.LookAndFeelInfo info : javax.swing.UIManager.getInstalledLookAndFeels()) {
if ("Nimbus".equals(info.getName())) {
javax.swing.UIManager.setLookAndFeel(info.getClassName());
break;
}
}
} catch (ClassNotFoundException ex) {
java.util.logging.Logger.getLogger(My.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (InstantiationException ex) {
java.util.logging.Logger.getLogger(My.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (IllegalAccessException ex) {
java.util.logging.Logger.getLogger(My.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (javax.swing.UnsupportedLookAndFeelException ex) {
java.util.logging.Logger.getLogger(My.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
}
java.awt.EventQueue.invokeLater(new Runnable() {
public void run() {
new My().setVisible(true);
}
});
}
private javax.swing.JButton jButton1;
private javax.swing.JPanel jPanel1;
private javax.swing.JScrollPane jScrollPane1;
private javax.swing.JTable jTable1;
private javax.swing.JTextField jTextField1;
}
答案 0 :(得分：1)
所以我用硬编码值测试了它（你应该总是使用需要数据库访问的MCVE），问题出在这里
jTextField1.setText(" ");
首次对焦文本字段时，插入符号前会有一个额外的空格。很难注意到，但它就在那里。这导致正则表达式不匹配，因为" Hello"与"Hello"不匹配。
当您按下按钮时，您明确地将文本设置为""（无空格），这就是它的工作原理。因此，您需要将文本字段的文本最初设置为空（甚至不是空格）。