JAVA之字节缓冲流

老规矩，上一段代码：

工具类代码：

import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
class IOUtil {

public static void copyByBuf(String filename1,String filename2) throws IOException{
File afile= new File(filename1);
File bfile=new File(filename2);
FileInputStream ain=new FileInputStream(afile);
FileOutputStream aout=new FileOutputStream(bfile);
BufferedInputStream input =new BufferedInputStream(ain);
BufferedOutputStream output=new BufferedOutputStream(aout);
int  a;
while((a= input.read())!=-1){
output.write(a);
}output.flush();
input.close();
output.close();
}
}

主类代码：

import java.io.File;
import java.io.IOException;

public class RandomAccessFileTest {
public static void main(String[] args) throws IOException{
File afile=new File("employee.txt");
if(!afile.exists())
afile.createNewFile();
long start=System.currentTimeMillis();
IOUtil.copyByBuf("F:\\大家的声音\\佳.mp3","F:\\大家的声音\\佳1.mp3");
long end=System.currentTimeMillis();
System.out.println("耗时="+(end-start)+"毫秒");
}
}

输出结果：