如何使 Select 所有复选框起作用
How to make Select all checkbox work
我有一个 jframe，我有一个连接到 sql 数据库的 jtable，我在 jtable 中添加了一个复选框列，如果用户单击比按更新按钮它会更新 table 中的某些列，在 jtable 顶部我放了另一个复选框，如果单击它，它应该 select 所有复选框，我试过使用鼠标单击事件，但我不知道为此使用什么代码，那么我该如何使它工作，请帮忙
我的代码如下
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.JFrame;
import javax.swing.JOptionPane;
import javax.swing.JTable;
import javax.swing.JScrollPane;
import javax.swing.table.DefaultTableModel;
import javax.swing.JLabel;
import javax.swing.JButton;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;
import java.awt.Font;
import java.awt.Color;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import java.util.Calendar;
import java.util.GregorianCalendar;
import javax.swing.JCheckBox;
public class Attendance extends JFrame implements MouseListener{
static JTable table;
JLabel lblDate;
JLabel lblNewLabel;
JCheckBox chckbxSelectAll;
/**
* Launch the application.
*/
public static void main(String[] args) {
EventQueue.invokeLater(new Runnable() {
public void run() {
Attendance frame = new Attendance();
frame.setVisible(true);
}
});
}
/**
* Create the frame.
*/
public Attendance() {
getContentPane().setBackground(Color.WHITE);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setBounds(100, 100, 600, 400);
setLocationRelativeTo(null);
getContentPane().setLayout(null);
// Customer List
JLabel lblAttendance = new JLabel("<html><u>Attendance</u></html>");
lblAttendance.setBounds(231, 11, 143, 25);
lblAttendance.setFont(new Font("Lucida Calligraphy", Font.BOLD, 20));
getContentPane().add(lblAttendance);
// ScrollPane
JScrollPane scrollPane = new JScrollPane();
scrollPane.setBounds(28, 59, 525, 240);
getContentPane().add(scrollPane);
// Table
table = new JTable();
scrollPane.setViewportView(table);
// Button Update
JButton btnUpdate = new JButton("Update");
btnUpdate.setBounds(255, 310, 89, 30);
btnUpdate.setFont(new Font("Verdana", Font.PLAIN, 15));
btnUpdate.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
UpdateData();
//UpdateData(strUserID); // Update Data
PopulateData(); // Reload Table
}
});
getContentPane().add(btnUpdate);
chckbxSelectAll = new JCheckBox("Select All");
chckbxSelectAll.setBounds(459, 29, 97, 23);
chckbxSelectAll.setBackground(Color.WHITE);
chckbxSelectAll.setFont(new Font("Verdana", Font.PLAIN, 15));
chckbxSelectAll.addMouseListener(this);
getContentPane().add(chckbxSelectAll);
lblDate = new JLabel("");
lblDate.setFont(new Font("Verdana", Font.PLAIN, 15));
lblDate.setBounds(28, 35, 136, 13);
getContentPane().add(lblDate);
clock();
PopulateData();
}
private void clock()
{
Calendar cal = new GregorianCalendar();
int day = cal.get(Calendar.DAY_OF_MONTH);
int month = cal.get(Calendar.JANUARY);
int year = cal.get(Calendar.YEAR);
lblDate.setText("Date :"+year+"/"+month+"/"+day+"");
}
private static void PopulateData() {
// Clear table
table.setModel(new DefaultTableModel());
// Model for Table
DefaultTableModel model = new DefaultTableModel() {
public Class<?> getColumnClass(int column) {
switch (column) {
case 0:
return String.class;
case 1:
return String.class;
case 2:
return String.class;
case 3:
return String.class;
case 4:
return int.class;
case 5:
return Boolean.class;
default:
return String.class;
}
}
};
table.setModel(model);
// Add Column
// model.addColumn("Select");
model.addColumn("UserId");
model.addColumn("Name");
model.addColumn("Date");
model.addColumn("Attended");
model.addColumn("Count");
model.addColumn("Select");
Connection con = null;
Statement s = null;
try {
Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
con = DriverManager.getConnection("jdbc:odbc:Project");
s = con.createStatement();
String sql = "SELECT * FROM Attendance ";
ResultSet rec = s.executeQuery(sql);
int row = 0;
while ((rec != null) && (rec.next())) {
model.addRow(new Object[0]);
model.setValueAt(false, row, 4); // Checkbox
model.setValueAt(rec.getString("UserId"), row, 0);
model.setValueAt(rec.getString("Name"), row, 1);
model.setValueAt(rec.getString("Date"), row, 2);
model.setValueAt(rec.getString("Attended"), row, 3);
model.setValueAt(rec.getString("Count"), row, 4);
row++;
}
} catch (Exception e) {
// TODO Auto-generated catch block
JOptionPane.showMessageDialog(null, e.getMessage());
e.printStackTrace();
}
}
// Update
private void UpdateData() {
Connection connect = null;
Statement s = null;
ResultSet rs = null;
try {
System.out.println("Entered");
Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
connect = DriverManager.getConnection("jdbc:odbc:Project");
System.out.println("Connected");
s = connect.createStatement();
String Query2 = "select * from Attendance ";
rs = s.executeQuery(Query2);
String id = "";
while (rs.next()) {
id = rs.getString(1);
}
System.out.println(id);
//System.out.println(strUserID);
String sql = "UPDATE Attendance SET Count=(Count+1) where UserId = '" + id + "'";
s.executeUpdate(sql);
System.out.println("Updated");
String sql2 = "UPDATE Attendance SET Attended=('Present') where UserId = '" + id + "'";
s.executeUpdate(sql2);
System.out.println("Done");
} catch (Exception e) {
// TODO Auto-generated catch block
//JOptionPane.showMessageDialog(null, e.getMessage());
e.printStackTrace();
}
}
@Override
public void mouseClicked(MouseEvent e) {
// throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
if(e.getSource()==chckbxSelectAll)
{
//System.out.println("Select ALL");
}
}
@Override
public void mousePressed(MouseEvent e) {
//throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
}
@Override
public void mouseReleased(MouseEvent e) {
//throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
}
@Override
public void mouseEntered(MouseEvent e) {
// throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
}
@Override
public void mouseExited(MouseEvent e) {
// throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
}
}
将 ChangeListener 添加到您的 selectAll 复选框。遍历您的 TableModel 并为每一行调用
model.setValueAt(true, row, 5);
为最后一列的单元格设置值
用下面的代码替换您的鼠标点击事件代码
@Override
public void mouseClicked(MouseEvent e) {
if(chckbxSelectAll.isSelected()){
for(int i=0;i<table.getRowCount();i++)
table.getModel().setValueAt(true, i, 5);
}else{
for(int i=0;i<table.getRowCount();i++)
table.getModel().setValueAt(false, i, 5);
}
}
我有一个 jframe，我有一个连接到 sql 数据库的 jtable，我在 jtable 中添加了一个复选框列，如果用户单击比按更新按钮它会更新 table 中的某些列，在 jtable 顶部我放了另一个复选框，如果单击它，它应该 select 所有复选框，我试过使用鼠标单击事件，但我不知道为此使用什么代码，那么我该如何使它工作，请帮忙 我的代码如下
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.JFrame;
import javax.swing.JOptionPane;
import javax.swing.JTable;
import javax.swing.JScrollPane;
import javax.swing.table.DefaultTableModel;
import javax.swing.JLabel;
import javax.swing.JButton;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;
import java.awt.Font;
import java.awt.Color;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import java.util.Calendar;
import java.util.GregorianCalendar;
import javax.swing.JCheckBox;
public class Attendance extends JFrame implements MouseListener{
static JTable table;
JLabel lblDate;
JLabel lblNewLabel;
JCheckBox chckbxSelectAll;
/**
* Launch the application.
*/
public static void main(String[] args) {
EventQueue.invokeLater(new Runnable() {
public void run() {
Attendance frame = new Attendance();
frame.setVisible(true);
}
});
}
/**
* Create the frame.
*/
public Attendance() {
getContentPane().setBackground(Color.WHITE);
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setBounds(100, 100, 600, 400);
setLocationRelativeTo(null);
getContentPane().setLayout(null);
// Customer List
JLabel lblAttendance = new JLabel("<html><u>Attendance</u></html>");
lblAttendance.setBounds(231, 11, 143, 25);
lblAttendance.setFont(new Font("Lucida Calligraphy", Font.BOLD, 20));
getContentPane().add(lblAttendance);
// ScrollPane
JScrollPane scrollPane = new JScrollPane();
scrollPane.setBounds(28, 59, 525, 240);
getContentPane().add(scrollPane);
// Table
table = new JTable();
scrollPane.setViewportView(table);
// Button Update
JButton btnUpdate = new JButton("Update");
btnUpdate.setBounds(255, 310, 89, 30);
btnUpdate.setFont(new Font("Verdana", Font.PLAIN, 15));
btnUpdate.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
UpdateData();
//UpdateData(strUserID); // Update Data
PopulateData(); // Reload Table
}
});
getContentPane().add(btnUpdate);
chckbxSelectAll = new JCheckBox("Select All");
chckbxSelectAll.setBounds(459, 29, 97, 23);
chckbxSelectAll.setBackground(Color.WHITE);
chckbxSelectAll.setFont(new Font("Verdana", Font.PLAIN, 15));
chckbxSelectAll.addMouseListener(this);
getContentPane().add(chckbxSelectAll);
lblDate = new JLabel("");
lblDate.setFont(new Font("Verdana", Font.PLAIN, 15));
lblDate.setBounds(28, 35, 136, 13);
getContentPane().add(lblDate);
clock();
PopulateData();
}
private void clock()
{
Calendar cal = new GregorianCalendar();
int day = cal.get(Calendar.DAY_OF_MONTH);
int month = cal.get(Calendar.JANUARY);
int year = cal.get(Calendar.YEAR);
lblDate.setText("Date :"+year+"/"+month+"/"+day+"");
}
private static void PopulateData() {
// Clear table
table.setModel(new DefaultTableModel());
// Model for Table
DefaultTableModel model = new DefaultTableModel() {
public Class<?> getColumnClass(int column) {
switch (column) {
case 0:
return String.class;
case 1:
return String.class;
case 2:
return String.class;
case 3:
return String.class;
case 4:
return int.class;
case 5:
return Boolean.class;
default:
return String.class;
}
}
};
table.setModel(model);
// Add Column
// model.addColumn("Select");
model.addColumn("UserId");
model.addColumn("Name");
model.addColumn("Date");
model.addColumn("Attended");
model.addColumn("Count");
model.addColumn("Select");
Connection con = null;
Statement s = null;
try {
Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
con = DriverManager.getConnection("jdbc:odbc:Project");
s = con.createStatement();
String sql = "SELECT * FROM Attendance ";
ResultSet rec = s.executeQuery(sql);
int row = 0;
while ((rec != null) && (rec.next())) {
model.addRow(new Object[0]);
model.setValueAt(false, row, 4); // Checkbox
model.setValueAt(rec.getString("UserId"), row, 0);
model.setValueAt(rec.getString("Name"), row, 1);
model.setValueAt(rec.getString("Date"), row, 2);
model.setValueAt(rec.getString("Attended"), row, 3);
model.setValueAt(rec.getString("Count"), row, 4);
row++;
}
} catch (Exception e) {
// TODO Auto-generated catch block
JOptionPane.showMessageDialog(null, e.getMessage());
e.printStackTrace();
}
}
// Update
private void UpdateData() {
Connection connect = null;
Statement s = null;
ResultSet rs = null;
try {
System.out.println("Entered");
Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
connect = DriverManager.getConnection("jdbc:odbc:Project");
System.out.println("Connected");
s = connect.createStatement();
String Query2 = "select * from Attendance ";
rs = s.executeQuery(Query2);
String id = "";
while (rs.next()) {
id = rs.getString(1);
}
System.out.println(id);
//System.out.println(strUserID);
String sql = "UPDATE Attendance SET Count=(Count+1) where UserId = '" + id + "'";
s.executeUpdate(sql);
System.out.println("Updated");
String sql2 = "UPDATE Attendance SET Attended=('Present') where UserId = '" + id + "'";
s.executeUpdate(sql2);
System.out.println("Done");
} catch (Exception e) {
// TODO Auto-generated catch block
//JOptionPane.showMessageDialog(null, e.getMessage());
e.printStackTrace();
}
}
@Override
public void mouseClicked(MouseEvent e) {
// throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
if(e.getSource()==chckbxSelectAll)
{
//System.out.println("Select ALL");
}
}
@Override
public void mousePressed(MouseEvent e) {
//throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
}
@Override
public void mouseReleased(MouseEvent e) {
//throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
}
@Override
public void mouseEntered(MouseEvent e) {
// throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
}
@Override
public void mouseExited(MouseEvent e) {
// throw new UnsupportedOperationException("Not supported yet."); //To change body of generated methods, choose Tools | Templates.
}
}
将 ChangeListener 添加到您的 selectAll 复选框。遍历您的 TableModel 并为每一行调用
model.setValueAt(true, row, 5);
为最后一列的单元格设置值
用下面的代码替换您的鼠标点击事件代码
@Override
public void mouseClicked(MouseEvent e) {
if(chckbxSelectAll.isSelected()){
for(int i=0;i<table.getRowCount();i++)
table.getModel().setValueAt(true, i, 5);
}else{
for(int i=0;i<table.getRowCount();i++)
table.getModel().setValueAt(false, i, 5);
}
}