【0802作业】复制图片

package com.io;
/**
 * 将图片复制一份
 * 2019-08-04
 * @author L
 */
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;

public class Picture {
    public static void main(String[] args) {
        DataInputStream dis=null;
        InputStream is=null;
        
        DataOutputStream dos=null;
        OutputStream os=null;
        
        try {
            is=new FileInputStream("D:\star.jpg");
            dis=new DataInputStream(is);
            
            os=new FileOutputStream("D:\myPicture.jpg");
            dos =new DataOutputStream(os);
            int num;
            while((num=dis.read())!=-1) {
                dos.write(num);
            }
            System.out.println("复制完成！");
        } catch (FileNotFoundException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }finally {
            try {
                dos.close();
                os.close();
                dis.close();
                is.close();
            } catch (IOException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
        }
        
    }
}