loginframe.java

小区物业管理系统（java版） java swing + access 2003

/*
 * LoginFrame.java
 *
 * Created on 2006年3月17日, 下午8:53
 */

package login;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import java.sql.*;
import wymanagesystem.MainFrame;
/**
 *
 * @author  王治
 */
public class LoginFrame extends javax.swing.JFrame {
     private String name;
     private String pwd;
    /** Creates new form LoginFrame */
    public LoginFrame() {
        super("用户登录");
        initComponents();
        setSize(375,325);
        Dimension screen=getToolkit().getScreenSize();
        setLocation((screen.width-getSize().width)/2, (screen.height-getSize().height)/2);
        try{
            String theLook=UIManager.getSystemLookAndFeelClassName();
            UIManager.setLookAndFeel(theLook);
            SwingUtilities.updateComponentTreeUI(this);
        }
        catch(Exception e){
            System.err.println("异常："+e);
        }
    }
    
    /** This method is called from within the constructor to
     * initialize the form.
     * WARNING: Do NOT modify this code. The content of this method is
     * always regenerated by the Form Editor.
     */
    // <editor-fold defaultstate="collapsed" desc=" 生成的代码 ">//GEN-BEGIN:initComponents
    private void initComponents() {
        inputs = new javax.swing.JPanel();
        labels = new javax.swing.JPanel();
        nameLabel = new javax.swing.JLabel();
        pwdLabel = new javax.swing.JLabel();
        texts = new javax.swing.JPanel();
        id = new javax.swing.JTextField();
        password = new javax.swing.JPasswordField();
        buttons = new javax.swing.JPanel();
        ok = new javax.swing.JButton();
        cancel = new javax.swing.JButton();
        jPanel5 = new javax.swing.JPanel();
        icon = new javax.swing.JLabel();

        getContentPane().setLayout(null);

        setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
        setName("\u767b\u5f55");
        setResizable(false);
        inputs.setLayout(null);

        inputs.setBorder(new javax.swing.border.EtchedBorder());
        labels.setLayout(null);

        nameLabel.setText("\u7528\u6237\u540d\uff1a");
        labels.add(nameLabel);
        nameLabel.setBounds(30, 20, 60, 20);

        pwdLabel.setText("\u5bc6\u7801\uff1a");
        labels.add(pwdLabel);
        pwdLabel.setBounds(30, 70, 50, 15);

        inputs.add(labels);
        labels.setBounds(10, 10, 100, 110);

        texts.setLayout(null);

        id.setToolTipText("\u8f93\u5165\u7528\u6237\u540d");
        id.setName("");
        texts.add(id);
        id.setBounds(10, 20, 140, 20);

        password.setToolTipText("\u8bf7\u8f93\u5165\u5bc6\u7801");
        password.setNextFocusableComponent(ok);
        texts.add(password);
        password.setBounds(10, 70, 140, 20);

        inputs.add(texts);
        texts.setBounds(120, 10, 220, 110);

        getContentPane().add(inputs);
        inputs.setBounds(10, 70, 350, 130);

        buttons.setLayout(null);

        buttons.setBorder(new javax.swing.border.EtchedBorder());
        ok.setText("\u767b\u5f55");
        ok.setToolTipText("\u767b\u5f55");
        ok.setNextFocusableComponent(ok);
        ok.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                okActionPerformed(evt);
            }
        });

        buttons.add(ok);
        ok.setBounds(50, 20, 70, 23);

        cancel.setText("\u53d6\u6d88");
        cancel.addActionListener(new java.awt.event.ActionListener() {
            public void actionPerformed(java.awt.event.ActionEvent evt) {
                cancelActionPerformed(evt);
            }
        });

        buttons.add(cancel);
        cancel.setBounds(210, 20, 70, 23);

        getContentPane().add(buttons);
        buttons.setBounds(10, 210, 350, 60);

        jPanel5.setLayout(null);

        icon.setFont(new java.awt.Font("华文行楷", 1, 36));
        icon.setHorizontalAlignment(javax.swing.SwingConstants.CENTER);
        icon.setIcon(new javax.swing.ImageIcon("F:\\netbeans\\WyManageSystem\\images\\logo.jpg"));
        jPanel5.add(icon);
        icon.setBounds(0, 0, 350, 50);

        getContentPane().add(jPanel5);
        jPanel5.setBounds(10, 10, 350, 50);

    }
    // </editor-fold>//GEN-END:initComponents

    private void okActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_okActionPerformed
// TODO 将在此处添加您的处理代码：登录
       name=id.getText().trim();//用户名
       pwd=new String(password.getPassword());//用户密码
        if(name.equals("")||pwd.equals("")){
            JOptionPane.showMessageDialog(this,"用户名或密码不能为空","登录",JOptionPane.INFORMATION_MESSAGE);
        }
        else{
           try{
               Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");//加载驱动
               Connection conn=DriverManager.getConnection("jdbc:odbc:wySystem","admin", "admin");//连接数据库
               String sql="select id,password from login where id=?";
               PreparedStatement pre=conn.prepareCall(sql);//查询表login的sql语句
               pre.clearParameters();
               pre.setString(1,name);
               ResultSet rs=pre.executeQuery();
               if(rs.next()){
                   String pass=rs.getString("password").trim();
                   if(pwd.regionMatches(0,pass,0,pass.length())){
                       this.dispose();
                       new MainFrame().setVisible(true);
                   }
                   else{
                        JOptionPane.showMessageDialog(this,"密码不正确","登录",JOptionPane.WARNING_MESSAGE);
                   }
               }
               else{
                   JOptionPane.showMessageDialog(this,"用户名不存在","登录",JOptionPane.WARNING_MESSAGE);
               }
               rs.close();
               conn.close();
           }
           catch(Exception e){
               JOptionPane.showMessageDialog(this,"登录异常"+e.toString(),"登录",JOptionPane.WARNING_MESSAGE);
           }
        }
    }//GEN-LAST:event_okActionPerformed

    private void cancelActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_cancelActionPerformed
        System.exit(0);   //退出登录程序 
    }//GEN-LAST:event_cancelActionPerformed
    
    /**
     * @param args the command line arguments
     */
    public static void main(String args[]) {
        java.awt.EventQueue.invokeLater(new Runnable() {
            public void run() {
                new LoginFrame().setVisible(true);
            }
        });
    }
    
    // 变量声明 - 不进行修改//GEN-BEGIN:variables
    private javax.swing.JPanel buttons;
    private javax.swing.JButton cancel;
    private javax.swing.JLabel icon;
    private javax.swing.JTextField id;
    private javax.swing.JPanel inputs;
    private javax.swing.JPanel jPanel5;
    private javax.swing.JPanel labels;
    private javax.swing.JLabel nameLabel;
    private javax.swing.JButton ok;
    private javax.swing.JPasswordField password;
    private javax.swing.JLabel pwdLabel;
    private javax.swing.JPanel texts;
    // 变量声明结束//GEN-END:variables
    
}