backup.java

来自「A easy phone book. With the book,you ca」· Java 代码 · 共 40 行

/******************************
*          备份版块           *
******************************/


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

public class backUp implements ActionListener
{   private static JFrame frm;
	static File file=new File("backUp.dat");
	static Byte bt[];
	static FileInputStream fi;
	static FileOutputStream fo;
	static DataInputStream in;
	static DataOutputStream out;
	public void actionPerformed(ActionEvent e){
		
		frm=phonenum.getFrame();
		try{
			fi=new FileInputStream("phonenum.mdb");
			fo=new FileOutputStream(file);
			in= new DataInputStream(fi);
			out = new DataOutputStream(fo);
			int i;
		        while ( (i = in.read()) != -1) {
		          out.write(i); //依次从输入流中读入字符，并将字符写入到输出流
		        }
		        in.close(); //关闭输入流
		        out.close();
		}
		
		catch(Exception e2){
			
		}
		JOptionPane.showMessageDialog(frm,"备份完毕,还原请将backUp.dat改为phonenum.mdb覆盖原文件");
	}
	
}