login.java

微型图书信息管理系统 基本实现所有图书信息管理的功能。

package pkg;

import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import java.io.*;
import java.util.*;
import java.util.regex.*;



 class Login extends JFrame implements 
 		Runnable,ActionListener {

 			private JLabel lbpassword = new JLabel();
 			private JLabel lbuser = new JLabel();
			private JLabel lblog = new JLabel();
			private JTextField tfuser = new JTextField();
			private JPasswordField tfpassword = new JPasswordField();
			private JButton btnOk = new JButton();
	
			private Container contrainer = getContentPane();
	
			public  Login() {
				super("图书信息管理系统登陆");
		
				Thread thread=new Thread(this);
				thread.start();	
						
				this.setSize(400,300);
				btnOk.addActionListener(this);
				this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
				}
	
	
			public void run(){
				/*
			 	 *加载进度
			 	 */
				BookinfoDemo headDemo;
				headDemo=new BookinfoDemo();		
				while(!headDemo.IsEnd()){	
					try{
						Thread.sleep(100);
						}
						catch(InterruptedException e){
						}
					}//while
				setVisible(true);
				show();	
				}	
			
			public void setLayout() {
	
				contrainer.setLayout(null);
	
				lbuser.setText("用户名");
				lbpassword.setText("密码");		
				lblog.setText("小型图书信息管理系统登录");
				
				contrainer.add(lblog);
				lblog.setBounds(100,40,250,20);
				contrainer.add(lbuser);
				lbuser.setBounds(100,90,40,20);
				contrainer.add(lbpassword);
				lbpassword.setBounds(100,140,40,20);
				
				contrainer.add(tfuser);
				tfuser.setBounds(150,90,100,22);
				contrainer.add(tfpassword);
				tfpassword.setBounds(150,140,100,22);
				
				btnOk.setText("确定");
				contrainer.add(btnOk);
				btnOk.setBounds(150,200,73,25);
				}
		
			public void actionPerformed(ActionEvent e){
				
				if(e.getActionCommand().equals("确定")){
					
					String user = tfuser.getText();
					String password = tfpassword.getText();
					if(user.equals("administrator")&&password.equals("123456"))
					{
      					BookinfoFrame frame = new BookinfoFrame();
						frame.setLayout();
						frame.show();
						this.hide();						
					}
					else {
						String output = "请输入正确的系统登录用户名和密码！";
						JOptionPane.showMessageDialog(null,output,"Message",
								JOptionPane.INFORMATION_MESSAGE);
						}
					}
										
			}
		}