JAVA IO流综合案例

//需求 d:/aaa/3.jpg   复制到 d:/bbb/1.jpg
//思路分析:   先读去3.jpg 然后读的同时写入1.jpg

package com.yang;

import java.io.*;

//需求 d:/aaa/3.jpg   复制到 d:/bbb/1.jpg
//思路分析:   先读去3.jpg 然后读的同时写入1.jpg
public class Demo7 {
    public static void main(String[] args) throws IOException {
        BufferedInputStream bis =  new BufferedInputStream(new FileInputStream("d:/aaa/3.jpg"));
        BufferedOutputStream bos = new BufferedOutputStream(new FileOutputStream("d:/bbb/1.jpg"));
        byte [] buf = new byte[4 * 1024];
        int length;
        while ((length = bis.read(buf)) !=-1){
            bos.write(buf,0,length);
        }
        bos.close();
        bis.close();

    }
}