ShowMain.java

//ShowMain.java
import java.awt.*;
import java.awt.event.*;
public class ShowMain extends Frame{
	Toolkit tool= getToolkit();
	String url="mainbk.png";
	Image img=tool.getImage(url);
		public void paint(Graphics g){
		g.drawImage(img,0,0,this);
	}

	MenuBar menubar1;
	Menu menu1,menu2,menu3,menu4,menu5,menu6,menu7,menu8;
	MenuItem mi_book_add,mi_book_update,mi_book_delete,mi_reader_add,mi_reader_update,mi_reader_delete;
	MenuItem mi_borrow,mi_back,mi_query_book,mi_query_reader,mi_update_pass,mi_exit;
	public void setRights(String right){
		if(right.equals("否")){
			menu1.setEnabled(false);
			menu5.setEnabled(false);
		}
	}
	public ShowMain(){
		setTitle("图书管理系统");	
		setLayout(new BorderLayout());
		setSize(640,480);setResizable(false);
		menubar1=new MenuBar();
		menu5=new Menu("基础维护");
		menu6=new Menu("图书维护");
		mi_book_add=new MenuItem("添加");
		mi_book_update=new MenuItem("修改");
		mi_book_delete=new MenuItem("删除");
		menu7=new Menu("读者维护");
		mi_reader_add=new MenuItem("添加读者");
		mi_reader_update=new MenuItem("修改读者");
		mi_reader_delete=new MenuItem("删除读者");
		menu1=new Menu("借阅管理");
		mi_borrow=new MenuItem("借书管理");
		mi_back=new MenuItem("还书管理");
		menu2=new Menu("查询管理");
		mi_query_book=new MenuItem("图书查询");
		mi_query_reader=new MenuItem("读者查询");
		menu3=new Menu("系统管理");
		mi_update_pass=new MenuItem("修改密码");
		mi_exit=new MenuItem("退出系统");
		menu5.add(menu6);                     menu6.add(mi_book_add);
		menu6.add(mi_book_update);      menu6.add(mi_book_delete);
		menu5.add(menu7);	       menu7.add(mi_reader_add);
		menu7.add(mi_reader_update);   menu7.add(mi_reader_delete);
		menu5.add(menu1);	       menu1.add(mi_borrow);
		menu1.add(mi_back);	       menu5.add(menu2);
		menu2.add(mi_query_book);       menu2.add(mi_query_reader);
		menu5.add(menu3);	       menu3.add(mi_update_pass);
		menu3.add(mi_exit);	       menubar1.add(menu5);
		menubar1.add(menu1);	         menubar1.add(menu2);
		 menubar1.add(menu3);		setMenuBar(menubar1);
		mi_book_add.addActionListener(new ActionListener(){
			public void actionPerformed(ActionEvent e){
				new BookAdd();
			}
		});
		mi_book_update.addActionListener(new ActionListener(){
			public void actionPerformed(ActionEvent e){
				new BookUpdate();
			}
		});
		mi_book_delete.addActionListener(new ActionListener(){
			public void actionPerformed(ActionEvent e){
				new BookDelete();
			}
		});
		mi_reader_add.addActionListener(new ActionListener(){
			public void actionPerformed(ActionEvent e){
				new ReaderAdd();
			}
		});
		mi_reader_update.addActionListener(new ActionListener(){
			public void actionPerformed(ActionEvent e){
				new ReaderUpdate();
			}
		});
		mi_reader_delete.addActionListener(new ActionListener(){
			public void actionPerformed(ActionEvent e){
				new ReaderDelete();
			}
		});
		
		mi_borrow.addActionListener(new ActionListener(){
			public void actionPerformed(ActionEvent e){
				new Borrow();
			}
		});
		
		mi_back.addActionListener(new ActionListener(){
			public void actionPerformed(ActionEvent e){
				new Back();
			}
		});
		mi_query_book.addActionListener(new ActionListener(){
			public void actionPerformed(ActionEvent e){
				new BookQuery();
			}
		});
		mi_query_reader.addActionListener(new ActionListener(){
			public void actionPerformed(ActionEvent e){
				new ReaderQuery();
			}
		});
		mi_update_pass.addActionListener(new ActionListener(){
			public void actionPerformed(ActionEvent e){
				new ChangePassWord();
			}
		});
		
		mi_exit.addActionListener(new ActionListener(){
			public void actionPerformed(ActionEvent e){
				DbOp.close();
				System.exit(0);
			}
		});
		

		addWindowListener(new WindowAdapter(){
			public void windowClosing(WindowEvent e){
				DbOp.close();
				System.exit(0);
			}
		});
		setLocationRelativeTo(null);
		setVisible(true);
	}
	public static void main(String[] args){
		new ShowMain();
	}
}