import java.io.FileInputStream;import java.io.FileNotFoundException;import java.io.FileOutputStream;import java.io.IOException;public class Copyfile2 {public static void copyBytesFile(String sFilename,String dFilename) throws IOException{//创建文件输入流对象和文件输出流对象//文件输入流对象与源文件关联FileInputStream fis = new FileInputStream(sFilename);//文件输出流对象与目标文件关联//循环读取文件，同时写出到外部磁盘文件FileOutputStream fos = new FileOutputStream(dFilename);//清空缓存、关闭流对象byte[] b = new byte[1024];//从关联的源文件中读一个字节，如果到达文件末，返回值为-1int read = fis.read(b);while(read !=-1){fos.write(b);//向关联的目标文件写出一个字节read = fis.read(b);}fis.close();fos.close();}//清空缓存，关闭流对象/*** @param args*/public static void main(String[] args) {// TODO Auto-generated method stublong t1,t2;t1 = System.currentTimeMillis();try {Copyfile2.copyBytesFile("a.mp3","temp.mp3");} catch (IOException e) {// TODO Auto-generated catch blocke.printStackTrace();}t2 = System.currentTimeMillis();System.out.println("用时：" + (t2-t1));}
}
转载于:https://www.cnblogs.com/my843532194/p/5374886.html
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