求一个java图书管管理软件登陆界面系统代码

package pack_view

import java.awt.BorderLayout

import java.awt.Dimension

import java.awt.Font

import java.awt.Graphics

import java.awt.GridLayout

import java.awt.Image

import java.awt.Toolkit

import java.awt.event.ActionEvent

import java.awt.event.FocusEvent

import java.awt.event.KeyAdapter

import java.awt.event.KeyEvent

import java.awt.event.MouseAdapter

import java.awt.event.MouseEvent

import java.awt.event.WindowEvent

import java.sql.Connection

import java.sql.DriverManager

import java.sql.ResultSet

import java.sql.Statement

import javax.swing.ImageIcon

import javax.swing.JButton

import javax.swing.JFrame

import javax.swing.JLabel

import javax.swing.JOptionPane

import javax.swing.JPanel

import javax.swing.JPasswordField

import javax.swing.JTextField

import javax.swing.UIManager

import javax.swing.UnsupportedLookAndFeelException

import javax.swing.plaf.multi.MultiLookAndFeel

import pack_DB.DB

public class Login extends JFrame{

/**

* 登陆界面

*/

private static final long serialVersionUID = 1L

JFrame jf = new JFrame()

private JPanel panel_all

private JPanel panel1 = new JPanel()

private JPanel panel2= new JPanel()

private JPanel panel3 = new JPanel()

private JPanel panel4 = new JPanel()

private JLabel jLabel_title

private JLabel jLabel_name = new JLabel()

private JLabel jLabel_password = new JLabel()

private JTextField jTextField_name = new JTextField(15)

private JPasswordField jPasswordField = new JPasswordField(15)

private JButton jb1 = new JButton()

private JButton jb2 = new JButton()

private Font font

String cid=""

String passwd =""

//加载背景图片

//脊衡 private ImageIcon imageicon

// private Image image

public Login() {

jf.setTitle("客运野信户端登陆")

jf.setSize(350, 300)

Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize()//旁轮把用户的显示器屏幕的尺寸（长和宽）赋值给变量screenSize

Dimension frameSize = jf.getSize()

if (frameSize.height >screenSize.height) {

frameSize.height = screenSize.height

}

if (frameSize.width >screenSize.width) {

frameSize.width = screenSize.width

}

//把d出的对话框窗口放置在屏幕中间

jf.setLocation((screenSize.width - frameSize.width) / 2, (screenSize.height - frameSize.height) / 2)

// imageicon = new ImageIcon(ClassLoader

//.getSystemResource("res/backgound.jpg".toString()))

panel_all = new JPanel(){

public void paintComponent(Graphics g){

super.paintComponents(g)

//image = imageicon.getImage()

//if(image != null)

//g.drawImage(image,0,0,getWidth(),getHeight(),this)

}

}

font=new Font("宋体正文", 0,20)

jLabel_title = new JLabel(new ImageIcon(ClassLoader

.getSystemResource("res/Login.jpg".toString())))

jLabel_title.setFont(font)

jLabel_title.setText("用户登陆")

jLabel_name.setFont(new java.awt.Font("Dialog", 0, 14))

jLabel_name.setText("用户名：")

jLabel_password.setFont(new java.awt.Font("Dialog", 0, 14))

jLabel_password.setText("密 码：")

jb1.setFont(new java.awt.Font("Dialog", 0, 18))

jb1.setText("确认")

jb2.setText("取消")

jb2.setFont(new java.awt.Font("Dialog", 0, 18))

jTextField_name.addKeyListener(new KeyAdapter()

{

public void keyPressed(KeyEvent e)

{

if(e.getKeyCode()==KeyEvent.VK_ENTER)

{

jb1.doClick()

}

}})

jPasswordField.addKeyListener(new KeyAdapter()

{

public void keyPressed(KeyEvent e)

{

if(e.getKeyCode()==KeyEvent.VK_ENTER)

{

jb1.doClick()

}

}})

panel1.add(jLabel_name)

panel1.add(jTextField_name)

panel2.add(jLabel_password)

panel2.add(jPasswordField)

panel3.add(jb1)

panel3.add(jb2)

panel4.add(jLabel_title)

panel_all.setLayout(new GridLayout(4,1))

panel_all.add(panel4)

panel_all.add(panel1)

panel_all.add(panel2)

panel_all.add(panel3)

panel_all.setOpaque(false)

jf.setLayout(new BorderLayout())

jf.add(panel_all)

jb1.addMouseListener(new MouseAdapter(){

public void mouseClicked(MouseEvent me){

// if(lc.validate(jTextField_name.getText().trim(),new String(jPasswordField.getPassword()).trim())){

// doLogin()

//new MainFrame()

//}

//else

// JOptionPane.showMessageDialog(null, "Password doesn't match account,please try again!")

}

})

jb2.addMouseListener(new MouseAdapter(){

public void mouseClicked(MouseEvent me){

System.exit(0)

}

})

jf.setVisible(true)

jf.repaint()

jf.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE)

}

/* public void doLogin(){

cid=jTextField_name.getText().trim()

passwd=jPasswordField.getText().trim()

String sql = "select *from customer where "+"cid='"+cid+"' and password='"+passwd+"'"

if (DB.connectDB()) {

if (DB.query(sql)){

System.out.print("登陆成功")

jf.dispose()

new MainFrame(cid)

return

} else {

System.out.print("登陆失败")

return

}

}

}

*/

public static void main(String[] args) {

// TODO Auto-generated method stub

new Login()

}

}

新建一个窗口，然后实现一个关闭按钮”窗口的功能

import java.awt.*

import java.awt.event.*

public 闹晌class TestWindowEvent {

    public static void main (String[] args) {

        new Frame88 ("WindowAdapter")

    }

}

class Frame88 extends Frame {

   Frame88 (String s) {

      super(s)

      setBounds (300,300,200,70)

      setLayout (null)

      setVisible (true)

  老孙    addWindowListener (new WindowAdapter() 液含锋{

          public void windowClosing(WindowEvent e) {

              setVisible (false)

              System.exit(0)

          }

      }  )

    } 

}

---