5、过滤流

package Io;

import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.Date;

public class BufferedStream_IoTest {
    public static void main(String[] args) {
        long startTime = new Date().getTime();
        FileInputStream fis = null;
        FileOutputStream fos = null;
        BufferedInputStream bis = null;
        BufferedOutputStream bos = null;
        try {
            fis = new FileInputStream("C:\Users\Samuel\Pictures\Allah Will Listen.png");
            bis = new BufferedInputStream(fis);
            fos = new FileOutputStream("G:\IoTest\Allah Will Listen.png");
            bos = new BufferedOutputStream(fos);
            byte[] buf = new byte[1024];
            int len = 0;
            while ((len = fis.read(buf)) > 0) {
                bos.write(buf, 0, len);
            }

        } catch (FileNotFoundException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        } finally {
            //当关闭流时会自动flush
            if (fis != null)
                try {
                    fis.close();
                } catch (IOException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                }
        }
        long endTime = new Date().getTime();
        System.out.println("需要"+(endTime-startTime)/1000);
    }
}