Java仿Vista登录窗口（null布局的使用）

来源：互联网发布：网络歌曲大全2016 编辑：程序博客网时间：2024/06/11 19:44
源码
import java.awt.*;import java.awt.event.*;import javax.swing.*;import java.sql.*;public class Main extends javax.swing.JFrame {private Dimension d = Toolkit.getDefaultToolkit().getScreenSize(); // Determine user's screen size        /** Creates new form NewAccount */    public Main() {        initComponents();    }        private void initComponents()    {    setResizable (false);    setLocation (d.width / 2 - getWidth() / 2, d.height / 2 - getHeight() / 2);        jLabel1 = new javax.swing.JLabel();        jLabel2 = new javax.swing.JLabel();        jLabel3 = new javax.swing.JLabel();        jLabel4 = new javax.swing.JLabel();        admin_userid = new javax.swing.JTextField();        admin_password = new javax.swing.JPasswordField();        staff_userid = new javax.swing.JTextField();        staff_password = new javax.swing.JPasswordField();        btnOk = new javax.swing.JButton();                Icon login = new ImageIcon("img/login.JPG");        JLabel computer = new JLabel(login);        Icon tabbed = new ImageIcon("img/admin.gif");        JLabel tab = new JLabel(tabbed);        Icon tabbed2 = new ImageIcon("img/staff.gif");        JLabel tab2 = new JLabel(tabbed2);        getContentPane().setLayout(null);                setTitle("SDMS");                getContentPane().add(computer);        computer.setBounds(40, 0, 273, 216);                //Admin Username label        jLabel1.setForeground (Color.black);        jLabel1.setHorizontalAlignment(javax.swing.SwingConstants.RIGHT);        jLabel1.setFont(new java.awt.Font("Tahoma", 1, 11));        jLabel1.setText("Username :");        getContentPane().add(jLabel1);        jLabel1.setBounds(50, 265, 75, 25);                //Admin Password label        jLabel2.setForeground (Color.black);        jLabel2.setHorizontalAlignment(javax.swing.SwingConstants.RIGHT);        jLabel2.setFont(new java.awt.Font("Tahoma", 1, 11));        jLabel2.setText("Password :");        getContentPane().add(jLabel2);        jLabel2.setBounds(50, 300, 75, 25);        getContentPane().add(admin_userid);        getContentPane().add(admin_password);        admin_userid.setBounds(130, 265, 150, 25);                admin_password.setBounds(130, 300, 150, 25);                //Staff Username label        jLabel3.setForeground (Color.black);        jLabel3.setHorizontalAlignment(javax.swing.SwingConstants.RIGHT);        jLabel3.setFont(new java.awt.Font("Tahoma", 1, 11));        jLabel3.setText("Username :");        getContentPane().add(jLabel3);        jLabel3.setBounds(50, 375, 75, 25);                //Staff Password label        jLabel4.setForeground (Color.black);        jLabel4.setHorizontalAlignment(javax.swing.SwingConstants.RIGHT);        jLabel4.setFont(new java.awt.Font("Tahoma", 1, 11));        jLabel4.setText("Password :");        getContentPane().add(jLabel4);        jLabel4.setBounds(50, 410, 75, 25);        getContentPane().add(staff_userid);        getContentPane().add(staff_password);        getContentPane().setBackground(Color.white);        staff_userid.setBounds(130, 375, 150, 25);                staff_password.setBounds(130, 410, 150, 25);                getContentPane().add(btnOk);                getContentPane().add(tab);        tab.setBounds(40, 225, 280,110);                getContentPane().add(tab2);        tab2.setBounds(40, 335, 280,110);                //Login button        btnOk.setText("LOGIN");        btnOk.setFont(new java.awt.Font("Tahoma", 1, 9));        btnOk.setBackground(Color.white);        btnOk.setBounds (236, 442, 70, 25);        btnOk.setToolTipText("Click to login");btnOk.addActionListener(new ActionListener(){  public void actionPerformed(ActionEvent evt){if (!staff_userid.getText().equals("") && !staff_password.getText().equals("")){verifystaffLogin();}else if (!admin_userid.getText().equals("") && !extracted().equals("")){verifyadminLogin();}}        });        pack();        setIconImage (getToolkit().getImage ("img/logo_1.png"));setSize (370, 500);setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);setVisible(true);}           public static void main(String args[]) {        new Main();    }        private javax.swing.JLabel jLabel1;    private javax.swing.JLabel jLabel2;    private javax.swing.JLabel jLabel3;    private javax.swing.JLabel jLabel4;    private javax.swing.JPasswordField admin_password;    private javax.swing.JButton btnOk;    private javax.swing.JTextField admin_userid;    private javax.swing.JTextField staff_userid;    private javax.swing.JPasswordField staff_password;    void verifyadminLogin() {Connection con=null;String url="jdbc:odbc:DobiTest";Statement st=null;  try  { String val1=admin_userid.getText(); val1=val1.trim(); String val2 =  (String)extracted(); val2 =  val2.trim();Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");   con=DriverManager.getConnection(url);   st = con.createStatement();ResultSet rs=st.executeQuery("Select password from admin where username='"+val1+"'");while(rs.next()){String user = rs.getString(1);boolean b=user.equals(val2);if(b){setVisible(false);JOptionPane.showMessageDialog((Component) null, "Wow! U got it! Hihi =B", "Mmuahaha", JOptionPane.PLAIN_MESSAGE);//MainMenu menu=new MainMenu();  << To link to other page, replace it with yours} else{JOptionPane.showMessageDialog((Component) null, "ÃÜÂëŽíÎó ", "Login Error", JOptionPane.INFORMATION_MESSAGE);admin_password.setText("");admin_password.requestFocus();}}  }  catch(SQLException ex)   {    System.out.println("Unable to access the database");   }  catch(ClassNotFoundException ex)   {    System.out.println("Class not found");   }  catch(Exception ex)  {               System.out.println("Exception raised is:"+ex);  }  finally {  con=null;  }}private String extracted(){return admin_password.getText();}void verifystaffLogin() {Connection con=null;String url="jdbc:odbc:DobiTest";Statement st=null;  try  { String val1=staff_userid.getText(); val1 = val1.trim(); String val2 =  (String)staff_password.getText(); val2 = val2.trim();Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");   con=DriverManager.getConnection(url);   st = con.createStatement();ResultSet rs=st.executeQuery("Select password from staff where username='"+val1+"'");while(rs.next()){String user = rs.getString(1);boolean b=user.equals(val2);if(b){setVisible(false);JOptionPane.showMessageDialog((Component) null, "Wow! U got it here too! Hihi =B", "Mmuahaha", JOptionPane.PLAIN_MESSAGE);//MainMenu menu=new MainMenu(); << To link to other page, replace it with yours} else{JOptionPane.showMessageDialog((Component) null, "Invalid password. Please try again. ", "Login Error", JOptionPane.INFORMATION_MESSAGE);staff_password.setText("");staff_password.requestFocus();}}  }  catch(SQLException ex)   {    System.out.println("Unable to access the database");   }  catch(ClassNotFoundException ex)   {    System.out.println("Class not found");   }  catch(Exception ex)  {               System.out.println("Exception raised is:"+ex);  }  finally {  con=null;  }}}
截图
声明：源码来自《源码爱好者》