compress a file to less size

Question

1.00/5 (1 vote)

See more:

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

Posted 3-Mar-14 22:16pm

Rajeshram009

Add a Solution

Comments

phil.o 4-Mar-14 4:19am

Please show the code you have so far.

Rajeshram009 4-Mar-14 4:47am

The code is their in the below web path.
http://www.mkyong.com/java/how-to-compress-files-in-zip-format/

Thanks a lot..

2 solutions

Add a Solution

Add your solution here

Treat my content as plain text, not as HTML

Preview 0

…

Existing Members

Sign in to your account

...or Join us

Download, Vote, Comment, Publish.

Your Email
Password
Forgot your password?

Your Email
This email is in use. Do you need your password?
Optional Password

I have read and agree to the Terms of Service and Privacy Policy
Please subscribe me to the CodeProject newsletters

When answering a question please:

Read the question carefully.
Understand that English isn't everyone's first language so be lenient of bad spelling and grammar.
If a question is poorly phrased then either ask for clarification, ignore it, or edit the question and fix the problem. Insults are not welcome.
Don't tell someone to read the manual. Chances are they have and don't get it. Provide an answer or move on to the next question.

Let's work to help developers, not make them feel stupid.

This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

Richard MacCutchan · Answer 1 · 2014-03-03T22:26:00

Solution 1

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

Posted 3-Mar-14 22:26pm

Richard MacCutchan

Comments

Rajeshram009 4-Mar-14 4:50am

Thanks Richard,

am looking to the same url what you shared.Am working on it.Its getting some error.i will be ping you if i need any support from you.

OriginalGriff · Answer 2 · 2014-03-03T22:34:00

Solution 2

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.

Posted 3-Mar-14 22:34pm

OriginalGriff

Comments

Rajeshram009 4-Mar-14 4:46am

Thanks.

Attached site is the same website that i followed earlier.The program under the margin "Advance ZIP example – Recursively" is working only.But this is not reducing the size.that means the output size is as same as input one.kindly help me for this.

Thanks a lot for the quick response.

OriginalGriff 4-Mar-14 4:52am

Start by looking at the input files: what type are they?

Rajeshram009 4-Mar-14 4:54am

one xml and other one is xsl

Rajeshram009 4-Mar-14 5:52am

hi,
Now i zipped a PDF having 26 Mb.after zipped it is changed to 23.2.This is not sufficient for me.I need to change to half of the original size.

Any algorithm is there...

OriginalGriff 4-Mar-14 5:59am

No.
PDF files are not compressed, but they can contain compressed format data (such as images and so forth) which will not compress further.

There is no "magic algorithm" which will allways allow you to compress a file by any fixed percentage: otherwise we would just have to use it repeatedly and send a count of the number of compressions along with a tiny file instead of transferring 700mb video files from Netflix...

What are you trying to do? why do you need to compress all files by 50%?