login.java~24~

代码是自己我的代码不是网上down的。是自己写的。里面有很多值得学习的知识点。还有一些javabean组件。不算自己写的JAR文件

package zcgl;

import java.awt.BorderLayout;

import javax.swing.JFrame;
import javax.swing.JLabel;
import java.awt.Dimension;
import javax.swing.JButton;
import java.awt.Rectangle;
import javax.swing.JTextField;
import javax.swing.JPasswordField;
import java.awt.Font;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.*;
import java.sql.*;
import javax.swing.*;

/**
 * <p>Title: </p>
 *
 * <p>Description: </p>
 *
 * <p>Copyright: Copyright (c) 2008</p>
 *
 * <p>Company: </p>
 *
 * @author not attributable
 * @version 1.0
 */
public class Login extends JFrame {
    BorderLayout borderLayout1 = new BorderLayout();
    JLabel jLabel2 = new JLabel();
    JLabel jLabel3 = new JLabel();
    JTextField txtName = new JTextField();

    JPasswordField txtPass = new JPasswordField();
    JButton jButton1 = new JButton();
    JButton jButton2 = new JButton();
    Connection con = null;
    Statement smt = null;
    ResultSet rs = null;

    public Login() {
        try {
            jbInit();
        } catch (Exception exception) {
            exception.printStackTrace();
        }
    }

    private void jbInit() throws Exception {
        getContentPane().setLayout(null);
        jLabel2.setFont(new java.awt.Font("宋体", Font.PLAIN, 16));
        jLabel2.setText("用户名:");
        jLabel2.setBounds(new Rectangle(62, 33, 62, 37));
        jLabel3.setFont(new java.awt.Font("宋体", Font.PLAIN, 16));
        jLabel3.setText("密码:");
        jLabel3.setBounds(new Rectangle(66, 93, 49, 32));
        txtName.setBounds(new Rectangle(126, 41, 160, 31));
        txtPass.setBounds(new Rectangle(125, 96, 164, 34));
        jButton1.setBounds(new Rectangle(73, 151, 93, 36));
        jButton1.setFont(new java.awt.Font("宋体", Font.PLAIN, 16));
        jButton1.setText("登陆");
        jButton1.addActionListener(new Login_jButton1_actionAdapter(this));
        jButton2.setBounds(new Rectangle(213, 150, 98, 36));
        jButton2.setFont(new java.awt.Font("宋体", Font.PLAIN, 16));
        jButton2.setText("退出");
        jButton2.addActionListener(new Login_jButton2_actionAdapter(this));
        this.getContentPane().add(txtPass);
        this.getContentPane().add(jLabel2);
        this.getContentPane().add(txtName);
        this.getContentPane().add(jLabel3);
        this.getContentPane().add(txtPass);
        this.getContentPane().add(jButton2);
        this.getContentPane().add(jButton1);
    }

    public void jButton1_actionPerformed(ActionEvent actionEvent) {

        if (txtName.getText().trim().equals("")) {
            JOptionPane.showMessageDialog(null, "用户名不能为空!");
        }
        else if (String.copyValueOf(txtPass.getPassword()).equals("")) {
            JOptionPane.showMessageDialog(null, "密码不能为空!");
        }
        else
        {
            try
            {
                con = new DBConn().getConnection();
                smt = con.createStatement();
                rs = smt.executeQuery("select * from OPERATOR where name='"+txtName.getText().trim()+"'");
                if(rs.next())
                {
                  String pass = rs.getString(2).trim();
                  if (String.copyValueOf(txtPass.getPassword()).equals(pass))
                  {
                      MainFrame frame = new MainFrame();
                   Dimension screenSize = Toolkit.getDefaultToolkit().
                                          getScreenSize();
                   Dimension frameSize = frame.getSize();
                   if (frameSize.height > screenSize.height) {
                       frameSize.height = screenSize.height;
                   }
                   if (frameSize.width > screenSize.width) {
                       frameSize.width = screenSize.width;
                   }
                   frame.setLocation((screenSize.width - frameSize.width) / 2,
                                     (screenSize.height - frameSize.height) /
                                     2);

                   frame.setVisible(true);
                   dispose();

                  }
                  else
                  {
                       JOptionPane.showMessageDialog(null, "密码不正确!");
                  }
                }
                else
                {
                   JOptionPane.showMessageDialog(null, "用户名不存在!");
                }

            }
            catch(Exception e)
            {

            }
        }


    }

    public void jButton2_actionPerformed(ActionEvent actionEvent) {
        System.exit(0);
    }
}


    class Login_jButton1_actionAdapter implements ActionListener {
        private Login adaptee;
        Login_jButton1_actionAdapter(Login adaptee) {
            this.adaptee = adaptee;
        }

        public void actionPerformed(ActionEvent actionEvent) {
            adaptee.jButton1_actionPerformed(actionEvent);
        }
    }


class Login_jButton2_actionAdapter implements ActionListener {
    private Login adaptee;
    Login_jButton2_actionAdapter(Login adaptee) {
        this.adaptee = adaptee;
    }

    public void actionPerformed(ActionEvent actionEvent) {
        adaptee.jButton2_actionPerformed(actionEvent);
    }
}