网站备案后换空间/山东大学经济研究院

缓存 new byte[101024];大小可根据实际情况定，如果文件很大，比如大于1G，可以设定为101024*1024

//都文件内容到内存File file = new File("kk.avi");//        读文件FileInputStream fileInputStream = new FileInputStream(file);
//        写文件FileOutputStream fileOutputStream = new FileOutputStream("kk3.avi");Date date=new Date();DateFormat format=new SimpleDateFormat("yyyy-MM-dd HH:mm:ss:SS");System.out.println("start:  "+format.format(date));
//        每次读10kbyte[] bytes = new byte[10*1024];int readLength = 0;while ((readLength=fileInputStream.read(bytes))!=-1){
//                System.out.println("readLength= " +readLength);fileOutputStream.write(bytes,0,readLength);}fileInputStream.close();fileOutputStream.close();Date date1=new Date();DateFormat format1=new SimpleDateFormat("yyyy-MM-dd HH:mm:ss:SS");System.out.println("end:  "+format1.format(date1));