这是代码
package edu.cn.kluniv.sjz.sis.view;
import java.awt.BorderLayout;
import java.awt.EventQueue;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.border.EmptyBorder;
import edu.cn.kluniv.sjz.sis.dao.UserDao;
import edu.cn.kluniv.sjz.sis.model.User;
import edu.cn.kluniv.sjz.sis.util.StringUtil;
import javax.swing.GroupLayout;
import javax.swing.GroupLayout.Alignment;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JTextField;
import javax.swing.JButton;
import javax.swing.LayoutStyle.ComponentPlacement;
import javax.swing.ImageIcon;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;
public class ModifyPasswordView extends JFrame {
private JPanel contentPane;
//private JTextField textField;
//private JTextField textField_1;
//private JTextField textField_2;
private JTextField oldPasswrdtextField;
private JTextField newPasswrdtextField;
private JTextField confirmPasswrdtextField;
private User user;
private UserDao userDao;
private String account;
private void confirmPasswordValue(ActionEvent evt) {
// TODO Auto-generated method stub
String oldPassword = oldPasswrdtextField.getText().toString();
String newPassword = newPasswrdtextField.getText().toString();
String confirmPassword = confirmPasswrdtextField.getText().toString();
if(StringUtil.isEmpty(oldPassword)) {
JOptionPane.showMessageDialog(this, "请填写旧密码");
}else if(StringUtil.isEmpty(newPassword)) {
JOptionPane.showMessageDialog(this, "请填写新密码");
}else if(StringUtil.isEmpty(confirmPassword)) {
JOptionPane.showMessageDialog(this, "请确认新密码");
}else if(!(newPassword.equals(confirmPassword))) {
JOptionPane.showMessageDialog(this, "两次密码输入不一致");
resetValue();
return;
}else if(oldPassword.equals(newPassword)) {
JOptionPane.showMessageDialog(this, "新旧密码一致，请重新输入");
resetValue();
}else {
user = new User(account,newPassword);
String retStr = userDao.updatePassword(user,account,oldPassword);
JOptionPane.showMessageDialog(this,retStr);
resetValue();
if(retStr.equals("密码修改成功"))
this.dispose();
}
}
protected void resetValue(ActionEvent evt) {
resetValue();
}
private void resetValue() {
// TODO Auto-generated method stub
oldPasswrdtextField.setText("");
newPasswrdtextField.setText("");
confirmPasswrdtextField.setText("");
}
/**
* Launch the application.
*/
public static void main(String[] args) {
EventQueue.invokeLater(new Runnable() {
public void run() {
try {
ModifyPasswordView frame = new ModifyPasswordView();
frame.setVisible(true);
} catch (Exception e) {
e.printStackTrace();
}
}
});
}
/**
* Create the frame.
*/
public ModifyPasswordView() {
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setBounds(100, 100, 450, 300);
contentPane = new JPanel();
contentPane.setBorder(new EmptyBorder(5, 5, 5, 5));
setContentPane(contentPane);
JLabel lblNewLabel = new JLabel("\u65E7\u5BC6\u7801");
lblNewLabel.setIcon(new ImageIcon(ModifyPasswordView.class.getResource("/edu/cn/kluniv/sjz/sis/image/\u5BC6\u7801 .png")));
JLabel lblNewLabel_1 = new JLabel("\u65B0\u5BC6\u7801");
lblNewLabel_1.setIcon(new ImageIcon(ModifyPasswordView.class.getResource("/edu/cn/kluniv/sjz/sis/image/\u5BC6\u7801.png")));
JLabel lblNewLabel_2 = new JLabel("\u786E\u8BA4\u5BC6\u7801");
lblNewLabel_2.setIcon(new ImageIcon(ModifyPasswordView.class.getResource("/edu/cn/kluniv/sjz/sis/image/\u5BC6\u7801.png")));
oldPasswrdtextField = new JTextField();
oldPasswrdtextField.setColumns(10);
newPasswrdtextField = new JTextField();
newPasswrdtextField.setColumns(10);
confirmPasswrdtextField = new JTextField();
confirmPasswrdtextField.setColumns(10);
JButton ConfirmButton = new JButton("\u786E\u8BA4");
ConfirmButton.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent evt) {
confirmPasswordValue(evt);
}
});
ConfirmButton.setIcon(new ImageIcon(ModifyPasswordView.class.getResource("/edu/cn/kluniv/sjz/sis/image/\u786E\u8BA4.png")));
JButton ResetButton = new JButton("\u91CD\u7F6E");
ResetButton.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent evt) {
resetValue(evt);
}
});
ResetButton.setIcon(new ImageIcon(ModifyPasswordView.class.getResource("/edu/cn/kluniv/sjz/sis/image/\u91CD\u7F6E.png")));
GroupLayout gl_contentPane = new GroupLayout(contentPane);
gl_contentPane.setHorizontalGroup(
gl_contentPane.createParallelGroup(Alignment.LEADING)
.addGroup(gl_contentPane.createSequentialGroup()
.addGap(53)
.addGroup(gl_contentPane.createParallelGroup(Alignment.TRAILING)
.addGroup(gl_contentPane.createSequentialGroup()
.addGroup(gl_contentPane.createParallelGroup(Alignment.LEADING)
.addComponent(lblNewLabel)
.addComponent(lblNewLabel_1)
.addComponent(lblNewLabel_2))
.addGap(44))
.addGroup(gl_contentPane.createSequentialGroup()
.addComponent(ConfirmButton)
.addGap(18)))
.addGroup(gl_contentPane.createParallelGroup(Alignment.LEADING)
.addComponent(confirmPasswrdtextField, GroupLayout.PREFERRED_SIZE, GroupLayout.DEFAULT_SIZE, GroupLayout.PREFERRED_SIZE)
.addComponent(newPasswrdtextField, GroupLayout.PREFERRED_SIZE, GroupLayout.DEFAULT_SIZE, GroupLayout.PREFERRED_SIZE)
.addComponent(oldPasswrdtextField, GroupLayout.PREFERRED_SIZE, GroupLayout.DEFAULT_SIZE, GroupLayout.PREFERRED_SIZE)
.addComponent(ResetButton))
.addContainerGap(131, Short.MAX_VALUE))
);
gl_contentPane.setVerticalGroup(
gl_contentPane.createParallelGroup(Alignment.LEADING)
.addGroup(gl_contentPane.createSequentialGroup()
.addGap(39)
.addGroup(gl_contentPane.createParallelGroup(Alignment.BASELINE)
.addComponent(lblNewLabel)
.addComponent(oldPasswrdtextField, GroupLayout.PREFERRED_SIZE, GroupLayout.DEFAULT_SIZE, GroupLayout.PREFERRED_SIZE))
.addGap(18)
.addGroup(gl_contentPane.createParallelGroup(Alignment.BASELINE)
.addComponent(lblNewLabel_1)
.addComponent(newPasswrdtextField, GroupLayout.PREFERRED_SIZE, GroupLayout.DEFAULT_SIZE, GroupLayout.PREFERRED_SIZE))
.addGap(18)
.addGroup(gl_contentPane.createParallelGroup(Alignment.BASELINE)
.addComponent(lblNewLabel_2)
.addComponent(confirmPasswrdtextField, GroupLayout.PREFERRED_SIZE, GroupLayout.DEFAULT_SIZE, GroupLayout.PREFERRED_SIZE))
.addGap(18)
.addGroup(gl_contentPane.createParallelGroup(Alignment.BASELINE)
.addComponent(ResetButton)
.addComponent(ConfirmButton))
.addContainerGap(38, Short.MAX_VALUE))
);
contentPane.setLayout(gl_contentPane);
}
}
报错如下
Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException
at edu.cn.kluniv.sjz.sis.view.ModifyPasswordView.confirmPasswordValue(ModifyPasswordView.java:61)
at edu.cn.kluniv.sjz.sis.view.ModifyPasswordView.access$0(ModifyPasswordView.java:40)
at edu.cn.kluniv.sjz.sis.view.ModifyPasswordView$2.actionPerformed(ModifyPasswordView.java:128)
at javax.swing.AbstractButton.fireActionPerformed(Unknown Source)
at javax.swing.AbstractButton$Handler.actionPerformed(Unknown Source)
at javax.swing.DefaultButtonModel.fireActionPerformed(Unknown Source)
at javax.swing.DefaultButtonModel.setPressed(Unknown Source)
at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(Unknown Source)
at java.awt.Component.processMouseEvent(Unknown Source)
at javax.swing.JComponent.processMouseEvent(Unknown Source)
at java.awt.Component.processEvent(Unknown Source)
at java.awt.Container.processEvent(Unknown Source)
at java.awt.Component.dispatchEventImpl(Unknown Source)
at java.awt.Container.dispatchEventImpl(Unknown Source)
at java.awt.Component.dispatchEvent(Unknown Source)
at java.awt.LightweightDispatcher.retargetMouseEvent(Unknown Source)
at java.awt.LightweightDispatcher.processMouseEvent(Unknown Source)
at java.awt.LightweightDispatcher.dispatchEvent(Unknown Source)
at java.awt.Container.dispatchEventImpl(Unknown Source)
at java.awt.Window.dispatchEventImpl(Unknown Source)
at java.awt.Component.dispatchEvent(Unknown Source)
at java.awt.EventQueue.dispatchEventImpl(Unknown Source)
at java.awt.EventQueue.access$500(Unknown Source)
at java.awt.EventQueue$3.run(Unknown Source)
at java.awt.EventQueue$3.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(Unknown Source)
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(Unknown Source)
at java.awt.EventQueue$4.run(Unknown Source)
at java.awt.EventQueue$4.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(Unknown Source)
at java.awt.EventQueue.dispatchEvent(Unknown Source)
at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)
at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
at java.awt.EventDispatchThread.run(Unknown Source)
