adminwindow.java

图书管理系统的设计与实现

package newLibrary;

import java.awt.*;
import java.awt.event.*;

import javax.swing.*;

import newLibrary.TitleFrame.scanReaderAction;
//import javax.swing.event.*;
import java.sql.*;


public class AdminWindow extends JFrame
{
	/**************声明变量************/
	private JPanel ContentPane;
	private JLabel jlab0 = new JLabel();      	//输出“管理员登录”文本；
	private JLabel jlab1 = new JLabel();	  	//输出“帐号”文本	
	private JLabel jlab2 = new JLabel();	  	//输出“密码”文本	

	private JTextField jtextfield1 = new JTextField();
	private JPasswordField jpasswordfield = new JPasswordField();
	private JButton enter = new JButton();		//“登录”按钮
	private JButton exit = new JButton();		//“退出”按钮
	private JButton guest = new JButton();
	
    
	/*定义AdminWindow()方法*/
	public AdminWindow()
	{		
		ContentPane = (JPanel)this.getContentPane();
	    ContentPane.setLayout(null);
	    this.setTitle("★图书馆管理系统★");
	    this.setBounds(300,200,400,300);
	    ContentPane.setBackground(Color.LIGHT_GRAY);

		/***********用户登陆界面********/

		jlab0.setText("管理员登陆");
		jlab0.setBounds(new Rectangle(95, 25, 200, 36));
		jlab0.setFont(new Font("Dialog", 1, 20));//设置字体大小
		jlab0.setForeground(Color.black);
		jlab1.setText("账  号:");
		jlab1.setBounds(new Rectangle(115, 85, 35, 20));
		jlab1.setForeground(Color.black);
		jlab2.setText("密  码:");
		jlab2.setBounds(new Rectangle(115, 125, 35, 20));
		jlab2.setForeground(Color.black);

		jtextfield1.setText("");
		jtextfield1.setBounds(new Rectangle(180, 85, 75, 25));

		jpasswordfield.setEchoChar('*');//返回要用于回显的字符。默认值为 '*'
		jpasswordfield.setText("");
		jpasswordfield.setBounds(new Rectangle(180, 125, 75, 25));

		enter.setText("登录");
		enter.setVisible(true);
		enter.setBounds(new Rectangle(110, 180, 75, 25));
		enter.addActionListener(new jenter_actionPerformed());//加事件监听
		enter.setForeground(Color.black);
		enter.setBackground(Color.LIGHT_GRAY);
		enter.setFocusable(true);
		
		exit.setText("退出");
		exit.setVisible(true);
		exit.setBounds(new Rectangle(230, 180, 75, 25));
		exit.addActionListener(new jexit_actionPerformed());//加事件监听
		exit.setForeground(Color.black);
		exit.setBackground(Color.LIGHT_GRAY);
		
		guest.setText("来宾帐户");
		guest.setVisible(true);
		guest.setBounds(new Rectangle(255, 30, 100, 25));
		guest.setFont(new Font("Dialog", 1, 14));
		guest.addActionListener(new guestAction("来宾帐户"));//加事件监听
		guest.setForeground(Color.black);
		guest.setBackground(Color.LIGHT_GRAY);
		

		/*******把控件添加到面板中去*******/
		ContentPane.add(jlab0);
		ContentPane.add(jlab1);
		ContentPane.add(jlab2);

		ContentPane.add(jtextfield1);
		ContentPane.add(jpasswordfield);
		ContentPane.add(enter);
		ContentPane.add(exit);
		ContentPane.add(guest);

		this.setVisible(true);
	}

	/**********设置动作按钮的监听事件***********/
	class jenter_actionPerformed implements ActionListener
	{
		public void actionPerformed(ActionEvent e)
		{
			String user = jtextfield1.getText().trim();
			String password = jpasswordfield.getText().trim();
	
			/******连接数据库*********/
			try {
      			String strurl =
          			"jdbc:odbc:driver={Microsoft Access Driver (*.mdb)};DBQ=student.mdb";
      			Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
      			Connection conn = DriverManager.getConnection(strurl);
      			Statement stmt = conn.createStatement();
  
      			/****判断用户输入的信息****/
      			if(user.equals("")|| password.equals(""))
      				JOptionPane.showMessageDialog(null, "账号或密码不能为空", "警告",
                                      JOptionPane.WARNING_MESSAGE);
      			else {
        			/*从数据库中查询用户名和密码*/
        			ResultSet rs = stmt.executeQuery("select * from user where username='" +
                                         user + "' AND password='" + password + "'");
                    /*如果信息正确则进行以下操作*/
                    if(rs.next())
                    {
                    	JOptionPane.showMessageDialog(null, "登陆成功");
                    	TitleFrame mainjframe = new TitleFrame();

                     	dispose();
                    }
                    else
                    	JOptionPane.showMessageDialog(null, "账号或密码输入错误", "警告",
                                        JOptionPane.WARNING_MESSAGE);
                        jtextfield1.setText("");
                        jpasswordfield.setText("");
                    }
			}
			catch(Exception ee)
			{
				ee.printStackTrace();
			}
		}
	}
	class jexit_actionPerformed implements ActionListener
	{
		public void actionPerformed(ActionEvent e) 
		{
			System.exit(0);			
		}
	}

	class guestAction extends AbstractAction
	{		
		public guestAction(String name) 
		{
			super(name);
		}
		public void actionPerformed(ActionEvent event)
		{
			JOptionPane.showMessageDialog(null, "欢迎您使用本系统！");
        	dispose();
        	
			FindTitleDialog guest =new FindTitleDialog();
			
	     	
		}
	}
	
}