字节流复制一个图片

1.用字节流读取对象和图片关联

2.用字节流写入流对象,创建一个图片文件.

3.通过循环读写,完成数据存储.

4.关闭资源

 

实例代码:

import java.io.*;

class CopyPic 

{

    public static void main(String[] args) 

    {

        FileOutputStream fos = null;

        FileInputStream fis = null;



        try

        {

            fos = new FileOutputStream("c:\\2.jpg");

            fis = new FileInputStream("c:\\1.jpg");



            byte[] buf  = new byte[1024];

            int len = 0;

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

                fos.write(buf, 0 , len);

            }





        }

        catch (IOException e)

        {

            throw new RuntimeException("failed!");

        }

        finally{

            try

            {

                if(fis !=null)

                    fis.close();

            }

            catch (IOException e)

            {

                throw new RuntimeException("read failed!");

            }



            try

            {

                if(fos !=null)

                    fos.close();

            }

            catch (IOException e)

            {

                throw new RuntimeException("write failed!");

            }

        }

    }

}