datamanage.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;

import java.awt.Container;
import java.awt.Dimension;
import java.awt.Toolkit;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.InputStream;
import java.sql.SQLException;

import javax.swing.ButtonGroup;
import javax.swing.ImageIcon;
import javax.swing.JDialog;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JRadioButton;


public class DataManage extends Mb {
	private JLabel icon;
	private ButtonIcon ok,beifen,huifu,close;
	private JDialog myDialog;
	private JRadioButton zhengchang,huancun;
	private ButtonGroup fruit;
	DataManage(String s, int i, int j) {
		super(s, i, j);
		con.setLayout(null);
		shezhi();
		add();
	}
	void shezhi(){
		
		icon=new JLabel(new ImageIcon("./data/image/heard/shujubeifen.jpg"));
		icon.setBounds(0,5,300,190);
		
		ok=new ButtonIcon("确定");
		ok.setBounds(110,70,70,25);
		ok.addActionListener(new ActionListener() {
			public void actionPerformed(ActionEvent e) {
				int n = JOptionPane.showConfirmDialog(zhengchang,"你是否要恢复备份？这样会使现在的数据丢失！！", "数据恢复",
						JOptionPane.YES_NO_OPTION);
				if(n==0){
					if(zhengchang.isSelected()){
						copyFile( "./data/DataBackup/book.mdb","./data/book.mdb");
						myDialog.dispose();
					}
					else{
						copyFile( "./data/CloseBackup/book.mdb","./data/book.mdb");
						myDialog.dispose();
					}
				
				}
				else{
					JOptionPane.showMessageDialog(zhengchang,"已放弃数据恢复！！！");
					myDialog.dispose();
				}
			}
		});
		
		
	beifen=new ButtonIcon("数据备份");
	beifen.setBounds(10,200,70,25);
	beifen.addActionListener(new ActionListener() {
		public void actionPerformed(ActionEvent e) {
			copyFile("./data/book.mdb", "./data/DataBackup/book.mdb");
		}
	});
	
	huifu=new ButtonIcon("数据恢复");
	huifu.setBounds(110,200,70,25);
	huifu.addActionListener(new ActionListener() {
		public void actionPerformed(ActionEvent e) {
			
			setDialog();
			
		}
	});
	
	
	close=new ButtonIcon("关闭");
	close.setBounds(210,200,70,25);
	close.addActionListener(new ActionListener(){

		public void actionPerformed(ActionEvent arg0) {
	         close();
			}	
	});
	}
	
	
	void setDialog(){
		myDialog=new JDialog(this,"数据备份");
		myDialog.setSize(300,130);
		Container con1=myDialog.getContentPane();
		fruit=new ButtonGroup();
		
		zhengchang=new JRadioButton("按正常备份恢复数据");
		zhengchang.setBounds(20,10,250,18);
		zhengchang.setSelected(true);
		huancun=new JRadioButton("按每次退出系统是备份的数据恢复");
		huancun.setBounds(20,40,250,18);
		fruit.add(zhengchang);
		fruit.add(huancun);
		
		
		con1.setLayout(null);
		con1.add(zhengchang);
		con1.add(huancun);
		con1.add(ok);
		
		
		Dimension dim=Toolkit.getDefaultToolkit().getScreenSize();  //获取分辨率
		myDialog.setLocation((dim.width - 300) / 2,(dim.height - 130) / 2);  //使窗体居中
		myDialog.setResizable(false);
		myDialog.setModal(true);
		myDialog.setVisible(true);
		myDialog.validate();
		
	}
	
	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]; 
		int length; 
		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,"数据备份/恢复成功！！！！！！！");
		}
		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/恢复失败！！请检查源文件是否存在！"); 
		e.printStackTrace(); 

		} 

		} 


	
	void add(){
		con.add(icon);
		con.add(beifen);
		con.add(huifu);
		con.add(close);
		con.validate();
	}
}