package DeliverFile;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.RandomAccessFile;
public class DeliverFile2 {
public static void main(String[] args) {
cut();
merge();
}
//拆分文件
public static void cut() {
File file = new File("G:\\test\\source.avi");
int num = 10;//分割文件的数量
long lon = file.length() / 10L + 1L;//使文件字节数+1,保证取到所有的字节
try {
RandomAccessFile raf1 = new RandomAccessFile(file, "r");
byte[] bytes = new byte[1024];//值设置越小,则各个文件的字节数越接近平均值,但效率会降低,这里折中,取1024
int len = -1;
for (int i = 0; i < 10; i++) {
String name = "G:\\test2\\source" + i + ".avi";
File file2 = new File(name);
RandomAccessFile raf2 = new RandomAccessFile(file2, "rw");
while ((len = raf1.read(bytes)) != -1){//读到文件末尾时,len返回-1,结束循环
raf2.write(bytes, 0, len);
if (raf2.length() > lon)//当生成的新文件字节数大于lon时,结束循环
break;
}
raf2.close();
}
raf1.close();
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
//合并文件
public static void merge() {
File file = new File("G:\\test2\\new.avi");
try {
RandomAccessFile target = new RandomAccessFile(file, "rw");
for (int i = 0; i < 10; i++) {
File file2 = new File("G:\\test2\\source" + i + ".avi");
RandomAccessFile src = new RandomAccessFile(file2, "r");
byte[] bytes = new byte[1024];//每次读取字节数
int len = -1;
while ((len = src.read(bytes)) != -1) {
target.write(bytes, 0, len);//循环赋值
}
src.close();
}
target.close();
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
}
Java实现视频文件的拆分与合并
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转载自my.oschina.net/u/3492343/blog/1583228
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