有没有一种有效的方法来“收割”一个文件（从尾部删除x个字节）？ [英] Is there an efficient way to "crop" a file (remove x number of bytes from tail)?

问题描述

大家下午好。我想知道如何有效地从文件末尾删除x个字节？ （append的逆操作）

从原始文件中读取字节并将它们写入一个新文件看起来不正确（快），特别是如果文件是巨大的一个。

有没有办法可以设置文件长度

或者更确切地说， cropa file？

解决方案

RandomAccessFile.setLength（long newLength）

Good afternoon all. I was wondering how do we efficiently remove x number of bytes from the end of a file? (inverse operation of append)

Reading the bytes from the original file and writing them to a new file just doesn't seem right (fast) especially if the file is a huge one.

Is there a way we could possibly set the file length?

Or rather, what's the best way to "crop" a file?

解决方案

RandomAccessFile.setLength(long newLength)

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