文件拷贝方法实现代码

package org.tarena.day02;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;

public class FileInputStreamDemo {

	public static void copy(File from,File to) throws Exception{
		FileInputStream in = new FileInputStream(from);
		FileOutputStream ou = new FileOutputStream(to);
		byte[] b = new byte[1024];
		//in.read(b);不能在外面写，而应作为while判断的条件，并且把数据读到byte［］数组中；
		while(in.read(b)!=-1){//直到数据读完为止，停止循环读取和写入；
			ou.write(b);
		}
		in.close();
		ou.close();
		System.out.println("copy完成了！！");
		
	}
	
	public static void main(String[] args) {
		String from ="/home/soft22/Desktop/很少人知道.txt";
		File flf = new File(from);
		String to = "/home/soft22/Desktop/232/123.txt";
		File flt = new File(to);
		try {			
			copy(flf,flt);
		} catch (Exception e) {
			// TODO: handle exception
		}
	}

}