Java中复制文件的两种方式

package IOProj;

import java.io.BufferedInputStream;

import java.io.BufferedOutputStream;

import java.io.FileInputStream;

import java.io.FileOutputStream;

import java.io.IOException;

public class CopyPicDemo {

public static void main(String[] args) throws IOException {

// TODO Auto-generated method stub

copyPic();

//
copyPic2();

}

private static void copyPic() throws IOException {

// TODO Auto-generated method stub

/**

* 复制一个图片 1、既有读也有写FileInputStream和FileOutputStream 2、还是非文本数据

* 使用到了字节流中用于操作文件的对象

*/

//1、被复制的源文件

FileInputStream fis = new FileInputStream("temp\\net.doc");

//2、复制之后产生的新的文件

FileOutputStream fos = new FileOutputStream("temp\\aa.doc");

// 3、自定义缓冲区对象

byte[] buf = new byte[1024];

int by = 0;

while ((by = fis.read(buf)) != -1) {

fos.write(buf, 0, by);

}

fos.close();

fos.close();

}

public static void copyPic2() throws IOException {

FileInputStream fis = new FileInputStream("temp\\net.doc");

FileOutputStream fos = new FileOutputStream("temp\\aa.doc");

BufferedInputStream bis=new BufferedInputStream(fis);

BufferedOutputStream bos=new BufferedOutputStream(fos);

int by=0;

byte[] buf=new byte[1024];

while((by=bis.read(buf))!=-1)

{

bos.write(buf,0,by);

}

fis.close();

fos.close();

bis.close();

bos.close();

}

}