将文件压缩到更小的大小 [英] compress a file to less size

问题描述

HI



我能够在java中压缩文件。但是压缩时无法减小尺寸。



请注意 ：文件可以是任何东西.exe或.txt等。



请帮助我做这件事。请让我知道更多信息需要继续这个。







谢谢

Raj

解决方案

参见http://www.oracle.com/technetwork/articles/java/compress-1565076.html [ ^ ]。

首先要注意的是Zipping文件不一定会减小尺寸：某些文件格式已经过高度压缩，将它们放入ZIP存档可以使它们占用更多空间而不是更少 - 这对视频来说非常正确文件等等。



这里有一个如何做的工作示例： http://www.mkyong.com/java/how-to-compress-files-in-zip-format/ [ ^ ] - 比较一下您自己的代码，看看是否有任何重大差异。

HI

I could able to Zip a file in java.But am not able reduce the size while compressing.

Please note:File could be any thing .exe or .txt etc.

Kindly help me for do this.kindly let me know any more information need to proceed this.



Thanks
Raj

解决方案

See http://www.oracle.com/technetwork/articles/java/compress-1565076.html[^].

The first thing to note is the Zipping files will not necessarily reduce the size: some file formats are already highly compressed, and putting them into a ZIP archive can make them take more space instead of less - this is very true for video files and such like.

There is a workign example of how to do it here: http://www.mkyong.com/java/how-to-compress-files-in-zip-format/[^] - compare that code with your own, and see if there are any major differences.

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