如何使用java程序将文本文件压缩为rar格式

Question

Is there any java library by which we can compress a plain text file(.txt) into winRAR format(.rar). I have been searching in google but couldn't find any relevant library which does that.

Answer 1

你可以随时做

Runtime.getRuntime().exec("rar -a somefile.txt"); 

Answer 2

I think RAR is not open-source format. I'd rather use ZIP - it's built-in in Java.

Answer 3

RAR is a proprietary format, and I don't know of any library to create it (although there seem to be some that can read it). Any reason why you wouldn't use another, more open format like 7zip (for compression), or plain Zip (for universal compatibility)?

Answer 4

(From the question, of which this one is a duplicate - RAR archives with java )

You could try JUnRar, "a RAR handling API implemented in pure Java" (quoting the site).

Answer 5

No you can not do it. Only WinRAR can create rar file. There is only a unrar library for it.

Answer 6

One reason to use RAR: It is sooooo much better than ZIP. For example: One of our production print files has a lot of repetition (including images) in it. 142 MB large, it zips to about 80MB. RAR seems to detect these repetitions and the resulting file is not even 2MB!

Answer 7

Why RAR? as others have mentioned, RAR is not open.

Java has native ZIP API. Java Zip API: How to Create a Zip File Using Java