mainframe.java

简单的书店管理系统,是课设期间教师指导完成的,希望会对大家有帮助!

package book;

//********************************************************************
//主窗体
//********************************************************************

import java.awt.BorderLayout;
import java.awt.Container;
import java.awt.Dimension;
import java.awt.GridLayout;
import java.awt.Toolkit;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;

import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JMenu;
import javax.swing.JMenuBar;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JToolBar;

public class MainFrame extends JFrame{
	private MuBar bar;
	private JPanel ptool;
	private MainPanel p;
	private Container con;
	private ToolBar tool;
	private boolean bstart,bclose;
	private ResultSet rs;
	private ShowFrame show;
	Pan_zt zt;
	
    static String  user;
	MainFrame(String s,String str) throws SQLException{
		super(s);
		user=str;
		setBoolean();
		shilihua();
		tianjia();
		shezhi();
		start();
	}
	
	void shilihua(){
		con = getContentPane();
		show=new ShowFrame();
		zt=new Pan_zt();
	    bar = new MuBar(this);
	    ptool=new JPanel();
	    ptool.setLayout(new BorderLayout());
	    p=new MainPanel(this);
	    tool=new ToolBar(bar);
	}
	
	//获取系统设置属性
	void setBoolean() throws SQLException{
		MainDAO dao=new MainDAO();
		rs=dao.getSelect("select * from xitongshezhi");
		rs.next();
		bstart=rs.getBoolean("启动显示");
		bclose=rs.getBoolean("关闭备份");
		rs.close();
		dao.close();	
	}
	
	//启动运行
	void start() throws SQLException{
        	if(bstart){
        		show.showChaoTimeBook();
        	}
        	
	}
	
	//设置组件
	void shezhi(){
		zt.setUser("当前操作员是:     "+user);
		this.setVisible(true);
		Dimension dim=Toolkit.getDefaultToolkit().getScreenSize();  //获取当前屏幕的分辨率
	    this.setSize(700,500); 
	    Dimension dim1 = this.getSize();// 获取当前窗体大小
		this.setLocation((dim.width - dim1.width) / 2,(dim.height - dim1.height) / 2);// 设置当前窗体居中
	    this.setVisible(true);  //设置窗体可见
	    this.setResizable(false);//设置不可更改窗体大小
	    this.validate();        //设置组件可见
	    
	    addWindowListener(new WindowAdapter() {
			public void windowClosing(WindowEvent e) {
				try {
					close();
				} catch (SQLException e1) {
					// TODO 自动生成 catch 块
					e1.printStackTrace();
				}
			}
		});//关闭事件   
	}
	
	
	//关闭时是否自动备份数据库
	void setClose(){
		if(bclose){
			copyFile("./data/book.mdb", "./data/CloseBackup/book.mdb");
		}
	}
	
	void close() throws SQLException{
		setBoolean();
		setClose();
		System.exit(0);
	}
	//数据备份
	public void copyFile(String oldPath, String newPath) { 
		try { 
		int bytesum = 0; 
		int byteread = 0; 
		File oldfile = new File(oldPath); 
		if (oldfile.exists()) { //文件存在时 
		InputStream inStream = new FileInputStream(oldPath); //读入原文件 
		FileOutputStream fs = new FileOutputStream(newPath); 
		byte[] buffer = new byte[1444]; 
		while ( (byteread = inStream.read(buffer)) != -1) { 
		bytesum += byteread; //字节数 文件大小 
		fs.write(buffer, 0, byteread); 
		} 
		inStream.close(); 
		JOptionPane.showMessageDialog(this,"缓存数据备份成功！！！！！！！");
		}
		else{
			JOptionPane.showMessageDialog(this,"备份失败，备份文件不存在！！！！！！！");	
		}
		} 
		catch (Exception e) { 
			JOptionPane.showMessageDialog(this,"数据备份失败！！请检查源文件是否存在！"); 
		e.printStackTrace(); 

		} 

		} 

	//添加组件方法
	//获取当前操作员
	static String getUser(){
		return user;
	}
	void tianjia(){
	    ptool.add(tool,BorderLayout.NORTH);
	    ptool.add(p,BorderLayout.CENTER);
		con.add(bar, BorderLayout.NORTH);
		con.add(ptool,BorderLayout.CENTER);
		con.add(zt,BorderLayout.SOUTH);
		con.validate();
	}

}