mainwindow.java

图书馆的图书管理系统！ 图书查询

package labraryManager;
import javax.swing.*;

import java.awt.*;
import java.awt.event.*;
import javax.swing.border.*;
public class MainWindow extends JFrame implements ActionListener{
    public static final int WIDTH=500;
    public static final int HEIGHT=400;
    
    public static String lnfName = "com.sun.java.swing.plaf.windows.WindowsLookAndFeel";
    public MainWindow(){
    	setSize(WIDTH,HEIGHT);
    	setDefaultCloseOperation(WindowConstants.DO_NOTHING_ON_CLOSE);
    	addWindowListener(new WindowDestroyer());
    	setTitle("图书管理系统");
    	Container x=getContentPane();
    	
    	x.setLayout(new BorderLayout());
    	JPanel jp=new JPanel();
    	jp.setLayout(new BorderLayout());
    	JLabel j=new JLabel();
    	ImageIcon i=new ImageIcon("D:\\workspace\\LabraryManageSystem\\labraryManager\\leaves.jpg");
    	
    	j.setIcon(i);
    	JLabel z=new JLabel("图书管理系统");
    	Font a=new Font("隶书",Font.PLAIN,50);
    	z.setFont(a);
    	z.setBorder(new EmptyBorder(10,100,10,10));
    	
    	jp.add(z,BorderLayout.NORTH);
    	
    	jp.add(j,BorderLayout.SOUTH);
    	x.add(jp,BorderLayout.CENTER);
    	JPanel y=new JPanel();
    	
    	y.setLayout(new FlowLayout());
    	JButton b1=new JButton("图书查询");
    	
    	b1.addActionListener(this);
    	y.add(b1);
    	JButton b2=new JButton("图书流通");
    	
    	b2.addActionListener(this);
    	y.add(b2);
    	JButton b3=new JButton("系统操作");
    	
    	b3.addActionListener(this);
    	y.add(b3);
    	JButton b4=new JButton("帮助");
    	
    	b4.addActionListener(this);
    	y.add(b4);
    	JButton b5=new JButton("退出");
    	
    	b5.addActionListener(this);
    	y.add(b5);
    	x.add(y,BorderLayout.SOUTH);
    	setLnf(lnfName);
    }
    private void setLnf(String lnfName) 
    {   
            try
            {
                UIManager.setLookAndFeel(lnfName);
                SwingUtilities.updateComponentTreeUI(this);
            }
            catch(UnsupportedLookAndFeelException ex1)
            {
                System.err.println("UnsupportLookAndFeel" + lnfName);
            }            
            catch(ClassNotFoundException ex2)
            {
                System.err.println("ClassNotFound: " + lnfName);
            }
            catch(InstantiationException ex3)
            {
                System.err.println("InstantiationException" + lnfName);
            }
            catch(IllegalAccessException ex4)
            {
                System.err.println("IllegalAccessException" + lnfName);
            }
    }
    public void actionPerformed(ActionEvent e){
    	if(e.getActionCommand().equals("图书查询"))
    	{
    		CheckWindow manager=new CheckWindow();
	    manager.setVisible(true);
	    dispose();
	    }
    	else if(e.getActionCommand().equals("图书流通"))
    	{
    		if(Main.entered==false){
    		ManagerWindow x=new ManagerWindow("图书流通");
	        x.setVisible(true);
	        dispose();
    		}
    		else{
    			CirculateWindow manager=new CirculateWindow();
                manager.setVisible(true);
                dispose();
    		}
	    }
    	else if(e.getActionCommand().equals("系统操作"))
    	{
    		if(Main.entered==false){
    		ManagerWindow x=new ManagerWindow("系统操作");
	        x.setVisible(true);
	        dispose();}
    		else{
    			SystemManageWindow x=new SystemManageWindow();
		        x.setVisible(true);
		        dispose();
    		}
	    }
    	else if(e.getActionCommand().equals("帮助"))
    		{
    		JOptionPane.showMessageDialog(null, "当前版本1.0,运行本系统时请勿在系统外对数据库进行操作，否则后果自负");
    		}
    	else if(e.getActionCommand().equals("退出"))
    	{
        	ConfirmWindow x=new ConfirmWindow();
        	x.setVisible(true);
        }
    	else
    		System.out.println("Error!");
    }
}