写一个文本文件开头的Java [英] Writing in the beginning of a text file Java
问题描述
我需要在文本文件的开头写一些东西。我有一个包含内容的文本文件，我想在此内容之前写一些内容。说我有;
I need to write something into a text file's beginning. I have a text file with content and i want write something before this content. Say i have;
下午好，先生，你今天好吗？
我很好，你好吗？
感谢问，我很好
Good afternoon sir,how are you today?
I'm fine,how are you?
Thanks for asking,I'm great
修改后，我想要这样：
After modifying,I want it to be like this:
第1页 - 场景59
25.05.2011
Page 1-Scene 59
25.05.2011
下午好，先生，你今天好吗？
我很好，你好吗？
感谢问，我很好
Good afternoon sir,how are you today?
I'm fine,how are you?
Thanks for asking,I'm great
刚刚组成的内容:)我如何以这种方式修改文本文件？
Just made up the content :) How can i modify a text file like this way?
推荐答案
您不能以这种方式真正地修改 - 文件系统通常不允许您在任意位置插入数据，但您可以：
You can't really modify it that way - file systems don't generally let you insert data in arbitrary locations - but you can:
- 创建新文件
- 将前缀写入
- 将数据从旧文件到新文件
- 将旧文件移动到备份位置
- 将新文件移动到旧文件文件的位置
- 可选地删除旧的备份文件
- Create a new file
- Write the prefix to it
- Copy the data from the old file to the new file
- Move the old file to a backup location
- Move the new file to the old file's location
- Optionally delete the old backup file
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