登录模块：
package com.xuejava.iframe;
import com.xuejava.Library;
import com.xuejava.jdbc.Admin;
import com.xuejava.jdbc.DAO;
import javax.swing.JOptionPane;
/**
*
* @author liyang
*/
public class LoginIFrame extends javax.swing.JFrame {
DAO dao = new DAO();
Admin admin = new Admin();
public LoginIFrame() {
initComponents();
this.setLocationRelativeTo(null); //窗口居中显示
}
@SuppressWarnings("unchecked")
// <editor-fold defaultstate="collapsed" desc="Generated Code">//GEN-BEGIN:initComponents
private void initComponents() {
jPanel2 = new javax.swing.JPanel();
jLabel1 = new javax.swing.JLabel();
jPanel1 = new javax.swing.JPanel();
btn_login = new javax.swing.JButton();
btn_reset = new javax.swing.JButton();
jPanel3 = new javax.swing.JPanel();
jLabel2 = new javax.swing.JLabel();
jLabel3 = new javax.swing.JLabel();
username = new javax.swing.JTextField();
password = new javax.swing.JPasswordField();
javax.swing.GroupLayout jPanel2Layout = new javax.swing.GroupLayout(jPanel2);
jPanel2.setLayout(jPanel2Layout);
jPanel2Layout.setHorizontalGroup(
jPanel2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGap(0, 100, Short.MAX_VALUE)
);
jPanel2Layout.setVerticalGroup(
jPanel2Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGap(0, 100, Short.MAX_VALUE)
);
setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
jLabel1.setIcon(new javax.swing.ImageIcon(getClass().getResource("/images/login.jpg"))); // NOI18N
getContentPane().add(jLabel1, java.awt.BorderLayout.PAGE_START);
jPanel1.setPreferredSize(new java.awt.Dimension(279, 60));
btn_login.setText("登录");
btn_login.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
btn_loginActionPerformed(evt);
}
});
btn_reset.setText("重置");
btn_reset.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
btn_resetActionPerformed(evt);
}
});
javax.swing.GroupLayout jPanel1Layout = new javax.swing.GroupLayout(jPanel1);
jPanel1.setLayout(jPanel1Layout);
jPanel1Layout.setHorizontalGroup(
jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(jPanel1Layout.createSequentialGroup()
.addGap(69, 69, 69)
.addComponent(btn_login)
.addGap(31, 31, 31)
.addComponent(btn_reset)
.addContainerGap(65, Short.MAX_VALUE))
);
jPanel1Layout.setVerticalGroup(
jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(javax.swing.GroupLayout.Alignment.TRAILING, jPanel1Layout.createSequentialGroup()
.addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE)
.addGroup(jPanel1Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(btn_login)
.addComponent(btn_reset))
.addGap(35, 35, 35))
);
getContentPane().add(jPanel1, java.awt.BorderLayout.PAGE_END);
jLabel2.setText("用户名：");
jLabel3.setText("密 码：");
username.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
usernameActionPerformed(evt);
}
});
password.addActionListener(new java.awt.event.ActionListener() {
public void actionPerformed(java.awt.event.ActionEvent evt) {
passwordActionPerformed(evt);
}
});
javax.swing.GroupLayout jPanel3Layout = new javax.swing.GroupLayout(jPanel3);
jPanel3.setLayout(jPanel3Layout);
jPanel3Layout.setHorizontalGroup(
jPanel3Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(jPanel3Layout.createSequentialGroup()
.addGap(19, 19, 19)
.addGroup(jPanel3Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addComponent(jLabel3, javax.swing.GroupLayout.PREFERRED_SIZE, 48, javax.swing.GroupLayout.PREFERRED_SIZE)
.addComponent(jLabel2, javax.swing.GroupLayout.PREFERRED_SIZE, 48, javax.swing.GroupLayout.PREFERRED_SIZE))
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.UNRELATED)
.addGroup(jPanel3Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.TRAILING, false)
.addComponent(username, javax.swing.GroupLayout.DEFAULT_SIZE, 165, Short.MAX_VALUE)
.addComponent(password))
.addContainerGap(37, Short.MAX_VALUE))
);
jPanel3Layout.setVerticalGroup(
jPanel3Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(jPanel3Layout.createSequentialGroup()
.addGap(34, 34, 34)
.addGroup(jPanel3Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(jLabel2, javax.swing.GroupLayout.PREFERRED_SIZE, 21, javax.swing.GroupLayout.PREFERRED_SIZE)
.addComponent(username, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
.addGap(27, 27, 27)
.addGroup(jPanel3Layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(jLabel3, javax.swing.GroupLayout.PREFERRED_SIZE, 21, javax.swing.GroupLayout.PREFERRED_SIZE)
.addComponent(password, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
.addContainerGap(javax.swing.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
);
getContentPane().add(jPanel3, java.awt.BorderLayout.CENTER);
pack();
}// </editor-fold>//GEN-END:initComponents
private boolean Check() {
String user = username.getText().trim();
String pass = new String(password.getPassword());
if (user.length() == 0) {
JOptionPane.showMessageDialog(null, "用户名不能为空");
password.setText("");
return false;
}
if (pass.length() == 0) {
JOptionPane.showMessageDialog(null, "请输入密码");
return false;
}
return true;
}
private void Login() {
admin.setName(username.getText().trim());
admin.setPass(new String(password.getPassword()));
if (dao.login(admin)) {
Library librery = new Library();
librery.setVisible(true);
this.setVisible(false);
}
username.setText("");
password.setText("");
}
private void btn_loginActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_btn_loginActionPerformed
// // TODO add your handling code here:
// String user_name = username.getText().trim();
// String pass_word = new String(password.getPassword());
//
// if (user_name.length() == 0) {
// JOptionPane.showMessageDialog(null, "用户名不能为空！");
// return;
// }
//
// if (pass_word.length() == 0) {
// JOptionPane.showMessageDialog(null, "密码不能为空！");
// }
//
// if ("admin".equals(user_name) && "123456".equals(pass_word)) {
//
// Library libraryFrame = new Library(); //生成一个主窗体，并初始化
// libraryFrame.setVisible(true); //使窗体可见
// //new Library().setVisible(true);
// this.setVisible(false);
// //this.dispose();
// } else {
// // 如果验证没有通过，则弹出提示信息
// JOptionPane.showMessageDialog(null, "只有管理员才可以登录！");
// username.setText(""); //将用户名文本框置空
// password.setText(""); //将密码文本框置空
if (Check()) {
Login();
}
}//GEN-LAST:event_btn_loginActionPerformed
private void btn_resetActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_btn_resetActionPerformed
//用户单击了“重置”按钮，则清空用户名和密码文本框
username.setText(""); //将用户名文本框置空
password.setText(""); //将密码文本框置空
}//GEN-LAST:event_btn_resetActionPerformed
private void usernameActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_usernameActionPerformed
// TODO add your handling code here:
password.requestFocus();
}//GEN-LAST:event_usernameActionPerformed
private void passwordActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_passwordActionPerformed
// TODO add your handling code here:
if (Check()) {
Login();
}
}//GEN-LAST:event_passwordActionPerformed
public static void main(String args[]) {
// /* Set the Nimbus look and feel */
// //<editor-fold defaultstate="collapsed" desc=" Look and feel setting code (optional) ">
// /* If Nimbus (introduced in Java SE 6) is not available, stay with the default look and feel.
// * For details see http://download.oracle.com/javase/tutorial/uiswing/lookandfeel/plaf.html
// */
// 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(LoginIFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
// } catch (InstantiationException ex) {
// java.util.logging.Logger.getLogger(LoginIFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
// } catch (IllegalAccessException ex) {
// java.util.logging.Logger.getLogger(LoginIFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
// } catch (javax.swing.UnsupportedLookAndFeelException ex) {
// java.util.logging.Logger.getLogger(LoginIFrame.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
// }
// //</editor-fold>
//
// /* Create and display the form */
// java.awt.EventQueue.invokeLater(new Runnable() {
// public void run() {
// new LoginIFrame().setVisible(true);
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(LoginIFrame.class
.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (InstantiationException ex) {
java.util.logging.Logger.getLogger(LoginIFrame.class
.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (IllegalAccessException ex) {
java.util.logging.Logger.getLogger(LoginIFrame.class
.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (javax.swing.UnsupportedLookAndFeelException ex) {
java.util.logging.Logger.getLogger(LoginIFrame.class
.getName()).log(java.util.logging.Level.SEVERE, null, ex);
}
//</editor-fold>
java.awt.EventQueue.invokeLater(new Runnable() {
public void run() {
new LoginIFrame().setVisible(true);
}
});
}
// Variables declaration - do not modify//GEN-BEGIN:variables
private javax.swing.JButton btn_login;
private javax.swing.JButton btn_reset;
private javax.swing.JLabel jLabel1;
private javax.swing.JLabel jLabel2;
private javax.swing.JLabel jLabel3;
private javax.swing.JPanel jPanel1;
private javax.swing.JPanel jPanel2;
private javax.swing.JPanel jPanel3;
private javax.swing.JPasswordField password;
private javax.swing.JTextField username;
// End of variables declaration//GEN-END:variables
}