JTable 过滤器数据无法正常工作
JTable filter data not working properly
我正在做一个项目"Library Management System"，一切都很好，直到我遇到了一个我无法解决的问题。
我有一个 GUI（附有屏幕截图）应用程序，它从数据库 table 获取数据，然后在 JTable 中显示结果。我在 JTextField 上应用了一个过滤器，以根据用户输入的数据过滤 JTable 的数据。
我遇到的错误是我有一个 JButton，它应该再次显示数据库中的所有数据并清除 JTextField。 JButton 正在清除 JTextField，但不会在 JTable 中再次显示来自数据库的数据。
App GUI截图和代码如下：
我只有两个 classes Login (main) class 和 Home class 如下所示：
登录（主）class：
package com.softoak.lms;
import java.awt.Color;
import java.awt.EventQueue;
import java.awt.Font;
import java.awt.Image;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.KeyAdapter;
import java.awt.event.KeyEvent;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JComboBox;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JPasswordField;
import javax.swing.JTextField;
import javax.swing.SwingUtilities;
import javax.swing.UIManager;
import javax.swing.UnsupportedLookAndFeelException;
public class Login {
private JFrame frmLibraryManagementSystem;
private JTextField textField;
private JPasswordField passwordField;
JComboBox<String> comboBox;
Connection con = null;
PreparedStatement ps = null;
ResultSet rs = null;
/**
* Launch the application.
*/
public static void main(String[] args) {
EventQueue.invokeLater(new Runnable() {
public void run() {
try {
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
UIManager.put("Button.defaultButtonFollowsFocus", Boolean.TRUE);
Login window = new Login();
window.frmLibraryManagementSystem.setVisible(true);
} catch (Exception e) {
e.printStackTrace();
}
}
});
}
/**
* Create the application.
*/
public Login() throws Exception {
con = DriverManager.getConnection("jdbc:sqlserver://localhost:1433;databaseName=LMS;integratedSecurity=true");
initialize();
}
public void actionLogin() {
String query = "SELECT * FROM LMSAdmin WHERE Username = ? AND Password = ?";
try {
ps = con.prepareStatement(query);
ps.setString(1, textField.getText());
char[] pwd = passwordField.getPassword();
String password = String.valueOf(pwd);
ps.setString(2, password);
rs = ps.executeQuery();
if (rs.next()) {
frmLibraryManagementSystem.dispose();
new Home().frame.setVisible(true);
JOptionPane.showMessageDialog(null, "Welcome ! ! !\nYou Are Logged In", "Welcome",
JOptionPane.INFORMATION_MESSAGE);
} else if (textField.getText().length() == 0 || password.length() == 0) {
JOptionPane.showMessageDialog(null, "Fields Should Not Be Empty ! ! !", "Error",
JOptionPane.WARNING_MESSAGE);
} else {
JOptionPane.showMessageDialog(null, "Wrong Username or Password", "Error", JOptionPane.WARNING_MESSAGE);
}
} catch (Exception ex) {
JOptionPane.showMessageDialog(null, ex.getMessage(), "Error", JOptionPane.ERROR_MESSAGE);
}
}
/**
* Initialize the contents of the frame.
*/
private void initialize() {
frmLibraryManagementSystem = new JFrame();
frmLibraryManagementSystem.setTitle("Library Management System - Login");
frmLibraryManagementSystem.setSize(1366, 726);
frmLibraryManagementSystem.setLocationRelativeTo(null);
frmLibraryManagementSystem.setResizable(false);
frmLibraryManagementSystem.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frmLibraryManagementSystem.getContentPane().setLayout(null);
JLabel LoginLock = new JLabel("");
Image imageloginlock = new ImageIcon(this.getClass().getResource("/LoginLock.png")).getImage();
Image imageFrame = new ImageIcon(this.getClass().getResource("/LMS Frame Icon.png")).getImage();
frmLibraryManagementSystem.setIconImage(imageFrame);
JButton btnExit = new JButton("EXIT");
btnExit.addKeyListener(new KeyAdapter() {
@Override
public void keyPressed(KeyEvent e) {
if (e.getKeyCode() == KeyEvent.VK_ENTER) {
int i = JOptionPane.showConfirmDialog(null, "Are You Sure You Want To Exit", "Exit",
JOptionPane.YES_NO_OPTION, JOptionPane.INFORMATION_MESSAGE);
if (i == JOptionPane.YES_OPTION) {
System.exit(0);
}
}
}
});
btnExit.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
int i = JOptionPane.showConfirmDialog(null, "Are You Sure You Want To Exit", "Exit",
JOptionPane.YES_NO_OPTION, JOptionPane.INFORMATION_MESSAGE);
if (i == JOptionPane.YES_OPTION) {
System.exit(0);
}
}
});
String[] lafoptions = { "Windows", "Nimbus", "Motif" };
comboBox = new JComboBox(lafoptions);
comboBox.setFocusable(false);
comboBox.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
if (comboBox.getSelectedIndex() == 0) {
try {
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
} catch (ClassNotFoundException | InstantiationException | IllegalAccessException
| UnsupportedLookAndFeelException exe) {
JOptionPane.showMessageDialog(null, exe.getMessage());
}
SwingUtilities.updateComponentTreeUI(frmLibraryManagementSystem);
} else if (comboBox.getSelectedIndex() == 1) {
try {
UIManager.setLookAndFeel("com.sun.java.swing.plaf.nimbus.NimbusLookAndFeel");
} catch (ClassNotFoundException | InstantiationException | IllegalAccessException
| UnsupportedLookAndFeelException exe) {
JOptionPane.showMessageDialog(null, exe.getMessage());
}
SwingUtilities.updateComponentTreeUI(frmLibraryManagementSystem);
} else if (comboBox.getSelectedIndex() == 2) {
try {
UIManager.setLookAndFeel("com.sun.java.swing.plaf.motif.MotifLookAndFeel");
} catch (ClassNotFoundException | InstantiationException | IllegalAccessException
| UnsupportedLookAndFeelException exe) {
JOptionPane.showMessageDialog(null, exe.getMessage());
}
SwingUtilities.updateComponentTreeUI(frmLibraryManagementSystem);
}
}
});
comboBox.setBounds(1198, 11, 145, 26);
frmLibraryManagementSystem.getContentPane().add(comboBox);
btnExit.setFont(new Font("Consolas", Font.BOLD, 16));
btnExit.setBounds(681, 355, 100, 29);
frmLibraryManagementSystem.getContentPane().add(btnExit);
JButton btnLogin = new JButton("LOGIN");
btnLogin.addKeyListener(new KeyAdapter() {
@Override
public void keyPressed(KeyEvent e) {
if (e.getKeyCode() == KeyEvent.VK_ENTER) {
actionLogin();
}
}
});
btnLogin.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
actionLogin();
}
});
btnLogin.setFont(new Font("Consolas", Font.BOLD, 16));
btnLogin.setBounds(578, 355, 100, 29);
frmLibraryManagementSystem.getContentPane().add(btnLogin);
passwordField = new JPasswordField();
passwordField.addKeyListener(new KeyAdapter() {
@Override
public void keyPressed(KeyEvent e) {
if (e.getKeyCode() == KeyEvent.VK_ENTER) {
actionLogin();
}
}
});
passwordField.setBounds(578, 313, 203, 30);
frmLibraryManagementSystem.getContentPane().add(passwordField);
textField = new JTextField();
textField.addKeyListener(new KeyAdapter() {
@Override
public void keyPressed(KeyEvent e) {
if (e.getKeyCode() == KeyEvent.VK_ENTER) {
actionLogin();
}
}
});
textField.setBounds(578, 271, 203, 30);
frmLibraryManagementSystem.getContentPane().add(textField);
textField.setColumns(10);
JLabel labelPassword = new JLabel("Password");
labelPassword.setFont(new Font("Copperplate Gothic Bold", Font.PLAIN, 20));
labelPassword.setBounds(441, 318, 129, 25);
frmLibraryManagementSystem.getContentPane().add(labelPassword);
JLabel labelUsername = new JLabel("Username");
labelUsername.setFont(new Font("Copperplate Gothic Bold", Font.PLAIN, 20));
labelUsername.setBounds(441, 276, 125, 25);
frmLibraryManagementSystem.getContentPane().add(labelUsername);
JLabel labelTitle = new JLabel("Library Management System");
labelTitle.setFont(new Font("Cooper Black", Font.BOLD, 34));
labelTitle.setBounds(396, 96, 567, 38);
frmLibraryManagementSystem.getContentPane().add(labelTitle);
LoginLock.setIcon(new ImageIcon(imageloginlock));
LoginLock.setBounds(924, 206, 256, 226);
frmLibraryManagementSystem.getContentPane().add(LoginLock);
JLabel labelLogin = new JLabel("Login");
labelLogin.setFont(new Font("Copperplate Gothic Bold", Font.BOLD, 30));
labelLogin.setBounds(622, 206, 115, 38);
frmLibraryManagementSystem.getContentPane().add(labelLogin);
JLabel lblSoftoak = new JLabel("");
Image image = new ImageIcon(this.getClass().getResource("/SoftOak Logo.jpeg")).getImage();
lblSoftoak.setIcon(new ImageIcon(image));
lblSoftoak.setBounds(988, 647, 172, 50);
frmLibraryManagementSystem.getContentPane().add(lblSoftoak);
JLabel lblCopyright = new JLabel("Copyright \u00A9 2016 Library Management System Developed By");
lblCopyright.setFont(new Font("Consolas", Font.BOLD, 20));
lblCopyright.setBounds(377, 669, 605, 24);
frmLibraryManagementSystem.getContentPane().add(lblCopyright);
JLabel lblBackground = new JLabel("");
lblBackground.setBackground(Color.BLACK);
lblBackground.setForeground(Color.WHITE);
Image imagebackground = new ImageIcon(this.getClass().getResource("/Background.jpg")).getImage();
lblBackground.setIcon(new ImageIcon(imagebackground));
lblBackground.setBounds(0, 0, 1366, 726);
frmLibraryManagementSystem.getContentPane().add(lblBackground);
}
}
首页Class
package com.softoak.lms;
import java.awt.Font;
import java.awt.Image;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.InputEvent;
import java.awt.event.KeyAdapter;
import java.awt.event.KeyEvent;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JMenu;
import javax.swing.JMenuBar;
import javax.swing.JMenuItem;
import javax.swing.JOptionPane;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.JTextField;
import javax.swing.KeyStroke;
import javax.swing.RowFilter;
import javax.swing.table.DefaultTableModel;
import javax.swing.table.TableModel;
import javax.swing.table.TableRowSorter;
import net.proteanit.sql.DbUtils;
public class Home {
public JFrame frame;
private JTable tableBooks;
private JTextField textFieldSearch;
Connection con = null;
PreparedStatement ps = null;
ResultSet rs = null;
TableModel tm;
TableRowSorter<TableModel> sorter;
/**
* Create the application.
*/
public Home() throws Exception {
con = DriverManager.getConnection("jdbc:sqlserver://localhost:1433;databaseName=LMS;integratedSecurity=true");
initialize();
getAllBooks();
}
public void getAllBooks(){
try {
String query = "SELECT ISBN, BookTitle AS 'Book Title', DateOfPublication AS 'Publication Date' FROM Books";
ps = con.prepareStatement(query);
rs = ps.executeQuery();
tableBooks.setModel(DbUtils.resultSetToTableModel(rs));
tm = tableBooks.getModel();
} catch (Exception ex) {
JOptionPane.showMessageDialog(null, ex.getMessage(), "Error", JOptionPane.ERROR_MESSAGE);
}
}
public void filterTable(){
sorter = new TableRowSorter<TableModel>(tm);
sorter.setRowFilter(RowFilter.regexFilter("(?i)" + textFieldSearch.getText()));
tableBooks.setRowSorter(sorter);
}
/**
* Initialize the contents of the frame.
*/
private void initialize() {
frame = new JFrame();
frame.setTitle("Library Management System - Home");
frame.setSize(1366, 726);
frame.setLocationRelativeTo(null);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.getContentPane().setLayout(null);
JLabel lblBackground = new JLabel("");
Image imagebackground = new ImageIcon(this.getClass().getResource("/Background.jpg")).getImage();
Image imageFrame = new ImageIcon(this.getClass().getResource("/LMS Frame Icon.png")).getImage();
frame.setIconImage(imageFrame);
JButton btnshowBooks = new JButton("Show All Books");
btnshowBooks.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
textFieldSearch.setText("");
try {
String query = "SELECT ISBN, BookTitle AS 'Book Title', DateOfPublication AS 'Publication Date' FROM Books";
ps = con.prepareStatement(query);
rs = ps.executeQuery();
tableBooks.setModel(DbUtils.resultSetToTableModel(rs));
} catch (Exception ex) {
JOptionPane.showMessageDialog(null, ex.getMessage(), "Error", JOptionPane.ERROR_MESSAGE);
}
}
});
textFieldSearch = new JTextField();
textFieldSearch.addKeyListener(new KeyAdapter() {
@Override
public void keyReleased(KeyEvent e) {
filterTable();
}
});
textFieldSearch.setBounds(422, 82, 590, 29);
frame.getContentPane().add(textFieldSearch);
textFieldSearch.setColumns(10);
JMenuBar menuBar = new JMenuBar();
menuBar.setBounds(0, 0, 1350, 28);
frame.getContentPane().add(menuBar);
JMenu mnFile = new JMenu("File");
menuBar.add(mnFile);
JMenuItem mntmAddNewBook = new JMenuItem("Add New Book");
mntmAddNewBook.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_N, InputEvent.CTRL_MASK));
mnFile.add(mntmAddNewBook);
JMenu mnAbout = new JMenu("Help");
menuBar.add(mnAbout);
JMenuItem mntmAboutUs = new JMenuItem("About Us");
mntmAboutUs.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_H, InputEvent.CTRL_MASK));
mntmAboutUs.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
ImageIcon icon = new ImageIcon(getClass().getResource("/SoftOak Logo.jpeg"));
JOptionPane.showMessageDialog(null,
"Library Management System\nDeveloped By Softoak\nFor Any Questions Contact: Chaudary Usman",
"About Us", JOptionPane.INFORMATION_MESSAGE, icon);
}
});
mnAbout.add(mntmAboutUs);
JScrollPane scrollPane = new JScrollPane();
scrollPane.setBounds(422, 122, 842, 475);
frame.getContentPane().add(scrollPane);
tableBooks = new JTable();
scrollPane.setViewportView(tableBooks);
tableBooks.setModel(new DefaultTableModel(new Object[][] {}, new String[] {}));
btnshowBooks.setBounds(1022, 82, 242, 30);
frame.getContentPane().add(btnshowBooks);
JLabel labelTitle = new JLabel("Library Management System");
labelTitle.setFont(new Font("Cooper Black", Font.BOLD, 34));
labelTitle.setBounds(391, 39, 567, 38);
frame.getContentPane().add(labelTitle);
lblBackground.setIcon(new ImageIcon(imagebackground));
lblBackground.setBounds(0, 0, 1350, 687);
frame.getContentPane().add(lblBackground);
}
}
这是我的 SQL 服务器 2012 的数据库架构：
我的数据库中只有这些记录（仅在书籍中 table）
您的 btnShowBooks 处理程序清除文本字段，使用 DbUtils 重建 table 模型并使用 setModel() 将新模型应用于 tableBooks。不幸的是，table 使用的是旧过滤器，旧过滤器使用的是旧型号。因为 RowFilter 会影响视图，所以可能根本不需要重建 table 模型；在任何一种情况下，您都可以简单地清除过滤器：
tableBooks.setRowSorter(null);
供参考，此完整 shows how to toggle a RowFilter in situ, without rebuilding the TableModel. As suggested here, don't use KeyListener on textFieldSearch. Instead, add a DocumentListener to listen for changes. Instead of setBounds(), use a layout to avoid the problem illustrated 。
我正在做一个项目"Library Management System"，一切都很好，直到我遇到了一个我无法解决的问题。
我有一个 GUI（附有屏幕截图）应用程序，它从数据库 table 获取数据，然后在 JTable 中显示结果。我在 JTextField 上应用了一个过滤器，以根据用户输入的数据过滤 JTable 的数据。
我遇到的错误是我有一个 JButton，它应该再次显示数据库中的所有数据并清除 JTextField。 JButton 正在清除 JTextField，但不会在 JTable 中再次显示来自数据库的数据。
App GUI截图和代码如下：
我只有两个 classes Login (main) class 和 Home class 如下所示：
登录（主）class：
package com.softoak.lms;
import java.awt.Color;
import java.awt.EventQueue;
import java.awt.Font;
import java.awt.Image;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.KeyAdapter;
import java.awt.event.KeyEvent;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JComboBox;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JPasswordField;
import javax.swing.JTextField;
import javax.swing.SwingUtilities;
import javax.swing.UIManager;
import javax.swing.UnsupportedLookAndFeelException;
public class Login {
private JFrame frmLibraryManagementSystem;
private JTextField textField;
private JPasswordField passwordField;
JComboBox<String> comboBox;
Connection con = null;
PreparedStatement ps = null;
ResultSet rs = null;
/**
* Launch the application.
*/
public static void main(String[] args) {
EventQueue.invokeLater(new Runnable() {
public void run() {
try {
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
UIManager.put("Button.defaultButtonFollowsFocus", Boolean.TRUE);
Login window = new Login();
window.frmLibraryManagementSystem.setVisible(true);
} catch (Exception e) {
e.printStackTrace();
}
}
});
}
/**
* Create the application.
*/
public Login() throws Exception {
con = DriverManager.getConnection("jdbc:sqlserver://localhost:1433;databaseName=LMS;integratedSecurity=true");
initialize();
}
public void actionLogin() {
String query = "SELECT * FROM LMSAdmin WHERE Username = ? AND Password = ?";
try {
ps = con.prepareStatement(query);
ps.setString(1, textField.getText());
char[] pwd = passwordField.getPassword();
String password = String.valueOf(pwd);
ps.setString(2, password);
rs = ps.executeQuery();
if (rs.next()) {
frmLibraryManagementSystem.dispose();
new Home().frame.setVisible(true);
JOptionPane.showMessageDialog(null, "Welcome ! ! !\nYou Are Logged In", "Welcome",
JOptionPane.INFORMATION_MESSAGE);
} else if (textField.getText().length() == 0 || password.length() == 0) {
JOptionPane.showMessageDialog(null, "Fields Should Not Be Empty ! ! !", "Error",
JOptionPane.WARNING_MESSAGE);
} else {
JOptionPane.showMessageDialog(null, "Wrong Username or Password", "Error", JOptionPane.WARNING_MESSAGE);
}
} catch (Exception ex) {
JOptionPane.showMessageDialog(null, ex.getMessage(), "Error", JOptionPane.ERROR_MESSAGE);
}
}
/**
* Initialize the contents of the frame.
*/
private void initialize() {
frmLibraryManagementSystem = new JFrame();
frmLibraryManagementSystem.setTitle("Library Management System - Login");
frmLibraryManagementSystem.setSize(1366, 726);
frmLibraryManagementSystem.setLocationRelativeTo(null);
frmLibraryManagementSystem.setResizable(false);
frmLibraryManagementSystem.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frmLibraryManagementSystem.getContentPane().setLayout(null);
JLabel LoginLock = new JLabel("");
Image imageloginlock = new ImageIcon(this.getClass().getResource("/LoginLock.png")).getImage();
Image imageFrame = new ImageIcon(this.getClass().getResource("/LMS Frame Icon.png")).getImage();
frmLibraryManagementSystem.setIconImage(imageFrame);
JButton btnExit = new JButton("EXIT");
btnExit.addKeyListener(new KeyAdapter() {
@Override
public void keyPressed(KeyEvent e) {
if (e.getKeyCode() == KeyEvent.VK_ENTER) {
int i = JOptionPane.showConfirmDialog(null, "Are You Sure You Want To Exit", "Exit",
JOptionPane.YES_NO_OPTION, JOptionPane.INFORMATION_MESSAGE);
if (i == JOptionPane.YES_OPTION) {
System.exit(0);
}
}
}
});
btnExit.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
int i = JOptionPane.showConfirmDialog(null, "Are You Sure You Want To Exit", "Exit",
JOptionPane.YES_NO_OPTION, JOptionPane.INFORMATION_MESSAGE);
if (i == JOptionPane.YES_OPTION) {
System.exit(0);
}
}
});
String[] lafoptions = { "Windows", "Nimbus", "Motif" };
comboBox = new JComboBox(lafoptions);
comboBox.setFocusable(false);
comboBox.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
if (comboBox.getSelectedIndex() == 0) {
try {
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
} catch (ClassNotFoundException | InstantiationException | IllegalAccessException
| UnsupportedLookAndFeelException exe) {
JOptionPane.showMessageDialog(null, exe.getMessage());
}
SwingUtilities.updateComponentTreeUI(frmLibraryManagementSystem);
} else if (comboBox.getSelectedIndex() == 1) {
try {
UIManager.setLookAndFeel("com.sun.java.swing.plaf.nimbus.NimbusLookAndFeel");
} catch (ClassNotFoundException | InstantiationException | IllegalAccessException
| UnsupportedLookAndFeelException exe) {
JOptionPane.showMessageDialog(null, exe.getMessage());
}
SwingUtilities.updateComponentTreeUI(frmLibraryManagementSystem);
} else if (comboBox.getSelectedIndex() == 2) {
try {
UIManager.setLookAndFeel("com.sun.java.swing.plaf.motif.MotifLookAndFeel");
} catch (ClassNotFoundException | InstantiationException | IllegalAccessException
| UnsupportedLookAndFeelException exe) {
JOptionPane.showMessageDialog(null, exe.getMessage());
}
SwingUtilities.updateComponentTreeUI(frmLibraryManagementSystem);
}
}
});
comboBox.setBounds(1198, 11, 145, 26);
frmLibraryManagementSystem.getContentPane().add(comboBox);
btnExit.setFont(new Font("Consolas", Font.BOLD, 16));
btnExit.setBounds(681, 355, 100, 29);
frmLibraryManagementSystem.getContentPane().add(btnExit);
JButton btnLogin = new JButton("LOGIN");
btnLogin.addKeyListener(new KeyAdapter() {
@Override
public void keyPressed(KeyEvent e) {
if (e.getKeyCode() == KeyEvent.VK_ENTER) {
actionLogin();
}
}
});
btnLogin.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
actionLogin();
}
});
btnLogin.setFont(new Font("Consolas", Font.BOLD, 16));
btnLogin.setBounds(578, 355, 100, 29);
frmLibraryManagementSystem.getContentPane().add(btnLogin);
passwordField = new JPasswordField();
passwordField.addKeyListener(new KeyAdapter() {
@Override
public void keyPressed(KeyEvent e) {
if (e.getKeyCode() == KeyEvent.VK_ENTER) {
actionLogin();
}
}
});
passwordField.setBounds(578, 313, 203, 30);
frmLibraryManagementSystem.getContentPane().add(passwordField);
textField = new JTextField();
textField.addKeyListener(new KeyAdapter() {
@Override
public void keyPressed(KeyEvent e) {
if (e.getKeyCode() == KeyEvent.VK_ENTER) {
actionLogin();
}
}
});
textField.setBounds(578, 271, 203, 30);
frmLibraryManagementSystem.getContentPane().add(textField);
textField.setColumns(10);
JLabel labelPassword = new JLabel("Password");
labelPassword.setFont(new Font("Copperplate Gothic Bold", Font.PLAIN, 20));
labelPassword.setBounds(441, 318, 129, 25);
frmLibraryManagementSystem.getContentPane().add(labelPassword);
JLabel labelUsername = new JLabel("Username");
labelUsername.setFont(new Font("Copperplate Gothic Bold", Font.PLAIN, 20));
labelUsername.setBounds(441, 276, 125, 25);
frmLibraryManagementSystem.getContentPane().add(labelUsername);
JLabel labelTitle = new JLabel("Library Management System");
labelTitle.setFont(new Font("Cooper Black", Font.BOLD, 34));
labelTitle.setBounds(396, 96, 567, 38);
frmLibraryManagementSystem.getContentPane().add(labelTitle);
LoginLock.setIcon(new ImageIcon(imageloginlock));
LoginLock.setBounds(924, 206, 256, 226);
frmLibraryManagementSystem.getContentPane().add(LoginLock);
JLabel labelLogin = new JLabel("Login");
labelLogin.setFont(new Font("Copperplate Gothic Bold", Font.BOLD, 30));
labelLogin.setBounds(622, 206, 115, 38);
frmLibraryManagementSystem.getContentPane().add(labelLogin);
JLabel lblSoftoak = new JLabel("");
Image image = new ImageIcon(this.getClass().getResource("/SoftOak Logo.jpeg")).getImage();
lblSoftoak.setIcon(new ImageIcon(image));
lblSoftoak.setBounds(988, 647, 172, 50);
frmLibraryManagementSystem.getContentPane().add(lblSoftoak);
JLabel lblCopyright = new JLabel("Copyright \u00A9 2016 Library Management System Developed By");
lblCopyright.setFont(new Font("Consolas", Font.BOLD, 20));
lblCopyright.setBounds(377, 669, 605, 24);
frmLibraryManagementSystem.getContentPane().add(lblCopyright);
JLabel lblBackground = new JLabel("");
lblBackground.setBackground(Color.BLACK);
lblBackground.setForeground(Color.WHITE);
Image imagebackground = new ImageIcon(this.getClass().getResource("/Background.jpg")).getImage();
lblBackground.setIcon(new ImageIcon(imagebackground));
lblBackground.setBounds(0, 0, 1366, 726);
frmLibraryManagementSystem.getContentPane().add(lblBackground);
}
}
首页Class
package com.softoak.lms;
import java.awt.Font;
import java.awt.Image;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.InputEvent;
import java.awt.event.KeyAdapter;
import java.awt.event.KeyEvent;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import javax.swing.ImageIcon;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JMenu;
import javax.swing.JMenuBar;
import javax.swing.JMenuItem;
import javax.swing.JOptionPane;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.JTextField;
import javax.swing.KeyStroke;
import javax.swing.RowFilter;
import javax.swing.table.DefaultTableModel;
import javax.swing.table.TableModel;
import javax.swing.table.TableRowSorter;
import net.proteanit.sql.DbUtils;
public class Home {
public JFrame frame;
private JTable tableBooks;
private JTextField textFieldSearch;
Connection con = null;
PreparedStatement ps = null;
ResultSet rs = null;
TableModel tm;
TableRowSorter<TableModel> sorter;
/**
* Create the application.
*/
public Home() throws Exception {
con = DriverManager.getConnection("jdbc:sqlserver://localhost:1433;databaseName=LMS;integratedSecurity=true");
initialize();
getAllBooks();
}
public void getAllBooks(){
try {
String query = "SELECT ISBN, BookTitle AS 'Book Title', DateOfPublication AS 'Publication Date' FROM Books";
ps = con.prepareStatement(query);
rs = ps.executeQuery();
tableBooks.setModel(DbUtils.resultSetToTableModel(rs));
tm = tableBooks.getModel();
} catch (Exception ex) {
JOptionPane.showMessageDialog(null, ex.getMessage(), "Error", JOptionPane.ERROR_MESSAGE);
}
}
public void filterTable(){
sorter = new TableRowSorter<TableModel>(tm);
sorter.setRowFilter(RowFilter.regexFilter("(?i)" + textFieldSearch.getText()));
tableBooks.setRowSorter(sorter);
}
/**
* Initialize the contents of the frame.
*/
private void initialize() {
frame = new JFrame();
frame.setTitle("Library Management System - Home");
frame.setSize(1366, 726);
frame.setLocationRelativeTo(null);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
frame.getContentPane().setLayout(null);
JLabel lblBackground = new JLabel("");
Image imagebackground = new ImageIcon(this.getClass().getResource("/Background.jpg")).getImage();
Image imageFrame = new ImageIcon(this.getClass().getResource("/LMS Frame Icon.png")).getImage();
frame.setIconImage(imageFrame);
JButton btnshowBooks = new JButton("Show All Books");
btnshowBooks.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
textFieldSearch.setText("");
try {
String query = "SELECT ISBN, BookTitle AS 'Book Title', DateOfPublication AS 'Publication Date' FROM Books";
ps = con.prepareStatement(query);
rs = ps.executeQuery();
tableBooks.setModel(DbUtils.resultSetToTableModel(rs));
} catch (Exception ex) {
JOptionPane.showMessageDialog(null, ex.getMessage(), "Error", JOptionPane.ERROR_MESSAGE);
}
}
});
textFieldSearch = new JTextField();
textFieldSearch.addKeyListener(new KeyAdapter() {
@Override
public void keyReleased(KeyEvent e) {
filterTable();
}
});
textFieldSearch.setBounds(422, 82, 590, 29);
frame.getContentPane().add(textFieldSearch);
textFieldSearch.setColumns(10);
JMenuBar menuBar = new JMenuBar();
menuBar.setBounds(0, 0, 1350, 28);
frame.getContentPane().add(menuBar);
JMenu mnFile = new JMenu("File");
menuBar.add(mnFile);
JMenuItem mntmAddNewBook = new JMenuItem("Add New Book");
mntmAddNewBook.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_N, InputEvent.CTRL_MASK));
mnFile.add(mntmAddNewBook);
JMenu mnAbout = new JMenu("Help");
menuBar.add(mnAbout);
JMenuItem mntmAboutUs = new JMenuItem("About Us");
mntmAboutUs.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_H, InputEvent.CTRL_MASK));
mntmAboutUs.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
ImageIcon icon = new ImageIcon(getClass().getResource("/SoftOak Logo.jpeg"));
JOptionPane.showMessageDialog(null,
"Library Management System\nDeveloped By Softoak\nFor Any Questions Contact: Chaudary Usman",
"About Us", JOptionPane.INFORMATION_MESSAGE, icon);
}
});
mnAbout.add(mntmAboutUs);
JScrollPane scrollPane = new JScrollPane();
scrollPane.setBounds(422, 122, 842, 475);
frame.getContentPane().add(scrollPane);
tableBooks = new JTable();
scrollPane.setViewportView(tableBooks);
tableBooks.setModel(new DefaultTableModel(new Object[][] {}, new String[] {}));
btnshowBooks.setBounds(1022, 82, 242, 30);
frame.getContentPane().add(btnshowBooks);
JLabel labelTitle = new JLabel("Library Management System");
labelTitle.setFont(new Font("Cooper Black", Font.BOLD, 34));
labelTitle.setBounds(391, 39, 567, 38);
frame.getContentPane().add(labelTitle);
lblBackground.setIcon(new ImageIcon(imagebackground));
lblBackground.setBounds(0, 0, 1350, 687);
frame.getContentPane().add(lblBackground);
}
}
这是我的 SQL 服务器 2012 的数据库架构：
我的数据库中只有这些记录（仅在书籍中 table）
您的 btnShowBooks 处理程序清除文本字段，使用 DbUtils 重建 table 模型并使用 setModel() 将新模型应用于 tableBooks。不幸的是，table 使用的是旧过滤器，旧过滤器使用的是旧型号。因为 RowFilter 会影响视图，所以可能根本不需要重建 table 模型；在任何一种情况下，您都可以简单地清除过滤器：
tableBooks.setRowSorter(null);
供参考，此完整RowFilter in situ, without rebuilding the TableModel. As suggested here, don't use KeyListener on textFieldSearch. Instead, add a DocumentListener to listen for changes. Instead of setBounds(), use a layout to avoid the problem illustrated