serverlogin.java

本工程模拟网上社区,其中包括银行,软件销售公司,软件投资公司,茶餐馆,和多个服务器.

package server;

import javax.swing.*;
import java.sql.Connection;
import java.sql.*;
public class ServerLogin extends javax.swing.JFrame {   
    Connection connection=null;
    PreparedStatement statement=null;
    private int number;  
    public ServerLogin() {
        initComponents();
        this.setLocation(450,180);
        try{
            Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
            connection=DriverManager.getConnection("jdbc:odbc:Account"); 
            String sql="select* from Account";
            statement=connection.prepareStatement(sql);
            number=0;  
        }
        catch(Exception e)
        {
            System.out.println("ServerLogin initial"+e.toString());
         }  
    }
    
   private void Validate()   //用户名和密码验证
   {
       number++;
       String account=jTextField_Name.getText(); 
       String code=jPasswordField.getText();
       if(account.equals("123456")&&code.equals("123456"))
       {
             Succuss() ; 
        }
        else{
             if(number==3)                        
            {
                jButton_Login.setEnabled(false);
                JOptionPane.showMessageDialog(this,"连续三次服务器名与密码不匹配,登陆失败");
            }
            else{
                jTextField_Name.setText(""); 
                jPasswordField.setText("");
            }
        }                            
   }
    private void Succuss()      //登陆成功
    {
        try
         {
            if(connection!=null)
                 connection.close();
           if(statement!=null)        
                 statement.close();
         }
         catch(Exception e)
         {
             System.out.println("ServerLogin Success"+e.toString());
         }        
        JOptionPane.showMessageDialog(this,"服务器登陆");   
         this.dispose();
         new Server().setVisible(true); 
    }  
    // <editor-fold defaultstate="collapsed" desc=" 生成的代码 ">//GEN-BEGIN:initComponents
    private void initComponents() {
        jPanel1 = new javax.swing.JPanel();
        jButton_Login = new javax.swing.JButton();
        jButton_Cancel = new javax.swing.JButton();
        jLabel2 = new javax.swing.JLabel();
        jPasswordField = new javax.swing.JPasswordField();
        jLabel1 = new javax.swing.JLabel();
        jTextField_Name = new javax.swing.JTextField();

        setDefaultCloseOperation(javax.swing.WindowConstants.DO_NOTHING_ON_CLOSE);
        setTitle("\u670d\u52a1\u5668\u767b\u9646");
        jPanel1.setBackground(new java.awt.Color(204, 204, 204));
        jPanel1.setBorder(javax.swing.BorderFactory.createEtchedBorder());
        jButton_Login.setText("\u767b\u9646");
        jButton_Login.addMouseListener(new java.awt.event.MouseAdapter() {
            public void mouseClicked(java.awt.event.MouseEvent evt) {
                jButton_LoginMouseClicked(evt);
            }
        });

        jButton_Cancel.setText("\u9000\u51fa");
        jButton_Cancel.addMouseListener(new java.awt.event.MouseAdapter() {
            public void mouseClicked(java.awt.event.MouseEvent evt) {
                jButton_CancelMouseClicked(evt);
            }
        });

        jLabel2.setText("\u5bc6    \u7801\uff1a");

        jPasswordField.addKeyListener(new java.awt.event.KeyAdapter() {
            public void keyPressed(java.awt.event.KeyEvent evt) {
                jPasswordFieldKeyPressed(evt);
            }
        });

        jLabel1.setText("\u670d\u52a1\u5668\u540d\uff1a");

        org.jdesktop.layout.GroupLayout jPanel1Layout = new org.jdesktop.layout.GroupLayout(jPanel1);
        jPanel1.setLayout(jPanel1Layout);
        jPanel1Layout.setHorizontalGroup(
            jPanel1Layout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING)
            .add(jPanel1Layout.createSequentialGroup()
                .add(27, 27, 27)
                .add(jPanel1Layout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING)
                    .add(org.jdesktop.layout.GroupLayout.TRAILING, jPanel1Layout.createSequentialGroup()
                        .add(18, 18, 18)
                        .add(jButton_Login)
                        .addPreferredGap(org.jdesktop.layout.LayoutStyle.RELATED, 92, Short.MAX_VALUE)
                        .add(jButton_Cancel)
                        .add(42, 42, 42))
                    .add(jPanel1Layout.createSequentialGroup()
                        .add(jPanel1Layout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING)
                            .add(jLabel1)
                            .add(jLabel2))
                        .add(27, 27, 27)
                        .add(jPanel1Layout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING)
                            .add(jPasswordField, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, 146, Short.MAX_VALUE)
                            .add(jTextField_Name, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, 146, Short.MAX_VALUE))
                        .add(33, 33, 33))))
        );
        jPanel1Layout.setVerticalGroup(
            jPanel1Layout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING)
            .add(org.jdesktop.layout.GroupLayout.TRAILING, jPanel1Layout.createSequentialGroup()
                .add(34, 34, 34)
                .add(jPanel1Layout.createParallelGroup(org.jdesktop.layout.GroupLayout.BASELINE)
                    .add(jLabel1)
                    .add(jTextField_Name, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE))
                .addPreferredGap(org.jdesktop.layout.LayoutStyle.RELATED, 53, Short.MAX_VALUE)
                .add(jPanel1Layout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING)
                    .add(jLabel2)
                    .add(jPasswordField, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE))
                .add(49, 49, 49)
                .add(jPanel1Layout.createParallelGroup(org.jdesktop.layout.GroupLayout.BASELINE)
                    .add(jButton_Cancel)
                    .add(jButton_Login))
                .addContainerGap())
        );

        org.jdesktop.layout.GroupLayout layout = new org.jdesktop.layout.GroupLayout(getContentPane());
        getContentPane().setLayout(layout);
        layout.setHorizontalGroup(
            layout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING)
            .add(layout.createSequentialGroup()
                .addContainerGap()
                .add(jPanel1, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE)
                .addContainerGap(org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
        );
        layout.setVerticalGroup(
            layout.createParallelGroup(org.jdesktop.layout.GroupLayout.LEADING)
            .add(layout.createSequentialGroup()
                .addContainerGap()
                .add(jPanel1, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE, org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, org.jdesktop.layout.GroupLayout.PREFERRED_SIZE)
                .addContainerGap(org.jdesktop.layout.GroupLayout.DEFAULT_SIZE, Short.MAX_VALUE))
        );
        pack();
    }// </editor-fold>//GEN-END:initComponents

    private void jPasswordFieldKeyPressed(java.awt.event.KeyEvent evt) {//GEN-FIRST:event_jPasswordFieldKeyPressed
// TODO 将在此处添加您的处理代码：
        String account=jTextField_Name.getText(); 
        String code=jPasswordField.getText();
        int  key=evt.getKeyCode();
        if(key==evt.VK_ENTER)
        {
            if(account.equals("")||code.equals(""))
            {
                JOptionPane.showMessageDialog(this,"输入错误，请重新输入");     
                jTextField_Name.setText("");
                jPasswordField.setText("");
            }
            else
            {    
                Validate();
            }          
        }
    }//GEN-LAST:event_jPasswordFieldKeyPressed

    private void jButton_CancelMouseClicked(java.awt.event.MouseEvent evt) {//GEN-FIRST:event_jButton_CancelMouseClicked
        try
         {
            if(connection!=null)
                 connection.close();
           if(statement!=null)        
                 statement.close();
         }
         catch(Exception e)
         {
             System.out.println("ServerLogin Cancel"+e.toString());
         }  
        this.dispose();
    }//GEN-LAST:event_jButton_CancelMouseClicked

    private void jButton_LoginMouseClicked(java.awt.event.MouseEvent evt) {//GEN-FIRST:event_jButton_LoginMouseClicked
        String account=jTextField_Name.getText(); 
        String code=jPasswordField.getText();
        if(account.equals("")||code.equals(""))
        {
            JOptionPane.showMessageDialog(this,"输入错误，请重新输入");     
            jTextField_Name.setText("");
            jPasswordField.setText("");
        }
        else
        {    
            Validate();
        }
    }//GEN-LAST:event_jButton_LoginMouseClicked
    
    
    // 变量声明 - 不进行修改//GEN-BEGIN:variables
    private javax.swing.JButton jButton_Cancel;
    private javax.swing.JButton jButton_Login;
    private javax.swing.JLabel jLabel1;
    private javax.swing.JLabel jLabel2;
    private javax.swing.JPanel jPanel1;
    private javax.swing.JPasswordField jPasswordField;
    private javax.swing.JTextField jTextField_Name;
    // 变量声明结束//GEN-END:variables
    public static void main(String args[]) {
        java.awt.EventQueue.invokeLater(new Runnable() {
            public void run() {
                new ServerLogin().setVisible(true);
            }
        });
    }    
}