compress « Zip « Java I/O Q&A





1. What is the best way to extract a zip file using java    stackoverflow.com

I have a a zipped file. That file contains various directories and files also. I want to extract all those and save in a specified path. So How to write a java ...

2. To Compress a big file in a ZIP with Java    stackoverflow.com

I have the need to compress a one Big file (~450 Mbyte) through the Java class ZipOutputStream. This big dimension causes a problem of "OutOfMemory" error of my JVM Heap Space. ...

3. Simple way to zip an existing file in Java?    stackoverflow.com

Is there a simple way, either through the Java libraries or a third party library to zip an existing file in Java? I am already familiar with the approach of creating a ...

4. how to compress a String?    stackoverflow.com

I use GZIPOutputStream or ZIPOutputStream to compress a String( my string.length() is less than 20), but the compress result is longer than original string. on some site, I found some friends said ...

5. .zip file created by Java doesn't support Chinese(utf-8)    stackoverflow.com

I want to create a .zip file using Java(jdk, ant.jar or commons-compress). But if the ZipEntry's name contains non-English(eg. Chinese, Japanese), it will display unreadable code in WinRAR or Windows Compress(commons-compress display ...

6. 7Zip does not exit after processing large zip file compression    stackoverflow.com

I am writing a java program on windows platform. I need to compress certain files into a zip archive. I am using ProcessBuilder to start a new 7zip process:

ProcessBuilder processBuilder = ...

7. Java - Unzipping files compressed differently    stackoverflow.com

Creating this application has become a pain in the ass! Using Java I want to unzip .zip files created by many different applications: Using my 7-zip this works perfectly fine, Using somebodys ...

8. How can I compress many PDF Files into a single 7z using LZMA in JAVA    stackoverflow.com

I'm trying to Zip many PDF files (representing tne same report containing same images and titles. Only some numbers differ from a PDF to another ) into a single "7z" (or ...

9. Managing a ZIP-based compression file in Java    stackoverflow.com

I know that Java natively supports the ability to navigate through and ope files compressed within a ZIP file, as that is what a JAR file is. How can I utilize ...





10. Unable to inflate a buffer deflated with java.util.zip.Deflater using Apache MINA compression filter    stackoverflow.com

This test:

import java.util.zip.Deflater;
import org.apache.mina.core.buffer.IoBuffer;
import org.apache.mina.filter.support.Zlib;
import org.junit.*;

public class ZlibTest {
    private Deflater deflater = null;

    private Zlib inflater = null;

    @Before
  ...

11. Using Java Deflater/Inflater with custom dictionary causes IllegalArgumentException    stackoverflow.com

The following code is based on the example given in the javadocs for java.util.zip.Deflater. The only changes I have made is to create a byte array called dict ...

12. Whats wrong with this zip method?    stackoverflow.com

I have a method which zips up 5 files. It produces a zip file without error, but I cannot open it to examine the contents. I tried emailing it and gmail ...

13. Difficulty unzipping files compressed using java.util.zip classes    coderanch.com

Hi, I'm trying to zip a single file using the ZipOutputStream. The code runs fine and produces a file, however I cannot unzip the file with either PKZip or WinZip (I get a "file does not appear to be a valid archive" error.). Here is the code segment I've written (where src and dest are File objects passed in to the ...

14. Getting zip exception while decompressing a compressed file    coderanch.com

I developed an application for compressing / decompressing files. I used the Sun code of ZipUtility and Winzip algorithm. When I try to decompress a 2GB zipped file, I am getting the following excpetion but the file got decompressed as expected. But this is working fine for small files without any exceptioin java.util.zip.ZipException: invalid entry size (expected 4294967295 but got -62198695 ...

15. Folder Zip Compression in Java    coderanch.com

16. compress / decompress issues with java.util.zip libraries    coderanch.com

I'm having problems with deflating / inflating code. Before I go farther, here's my code... private static void inflateDeflate () { try { // Encode a String into bytes String inputString = "blahblahblah??"; byte[] input = inputString.getBytes ("UTF-8"); // Compress the bytes byte[] output = new byte[8192]; Deflater compresser = new Deflater (); compresser.setInput (input); compresser.finish (); int compressedDataLength = compresser.deflate ...





17. Java Compress Multiple files as zip file    coderanch.com

I am currently working on a project that requires me to compress log files. I came across a problem when I have to compress multiple log files into a single file. I don't know how to do this. Please give me pointers or hints of how I can do this. Anything would be great. Thanks, Chue

18. Compress .zip using Java    coderanch.com

Hi James, thanks for helping me... I already know that Java's class however I can't use it to multi-files I only know to use it for only one file, look at below my code please: private void compactarParaZip(String arqEntrada1, String arqEntrada2, String arqSaida) throws IOException{ int tamanhoBuffer = 99999; int cont = 0; byte[] dados = new byte[tamanhoBuffer]; BufferedInputStream origem1 = ...

19. Problem with filenames in zip compression program    forums.oracle.com

/** * Write the content of srcFile in a new ZipEntry, named path+srcFile, of the zip stream. The result * is that the srcFile will be in the path folder in the generated archive. * * @param path String, the relatif path with the root archive. * @param srcFile String, the absolute path of the file to add * @param zip ...

20. Zip: concatening compressed chunks, will it give a single zip file    forums.oracle.com

Are concatenated zipped chunks recognized as a single zip file? What I am trying to achieve(using java.util.zip) is like, my application is generating a large CSV file, i need to compress this data and write it into a file or send to network. But I dont want to wait until the complete data generation and need to compress data in chunks; ...