zip4j | A zip4j library that fixes th_TH locale
kandi X-RAY | zip4j Summary
kandi X-RAY | zip4j Summary
zip4j
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Top functions reviewed by kandi - BETA
- Update a local file header
- Writes an array of bytes
- Start the next split file
- Get a list of all the header signatures
- Skips the specified number of bytes in uncompressed data
- Read bytes into an array of bytes
- Reads bytes into an array of bytes
- Checks the validity of the AES mac bytes
- Creates a new zip file and adds it to the zip file
- Adds a stream to the zip
- This method initializes the AESDecryptor
- Derives a key from the password
- Parses a PBKDF2Parameters string
- Convert a hex string to a byte array
- Initializes the key
- Generates a random salt
- Set the root folder
- Returns the FileHeader with the given fileName and the given fileName
- Checks if the file is readable
- Checks if the zip file is encrypted
- Initialize the zip model
- Initialize the header bytes
- Verify key
- Merge the zip files into a single zip file
- Sets the comment for this zip file
- Returns an input stream for the given file header
zip4j Key Features
zip4j Examples and Code Snippets
Lines of Code : 14License : Permissive (MIT License)
Copypublic static void zip4j() throws IOException {
// zip file with a single file
new ZipFile("filename.zip").addFile("file.txt");
// zip file with multiple files
List files = Arrays.asList(
new File("fi Community Discussions
Trending Discussions on zip4j
QUESTION
I'm working on generating a zip file that has to compress around 2000 documents that are around 1GB in total and after that to upload the zip file in s3 bucket.
I'm using net.lingala.zip4j which is a really nice Java library for handling Zip files. Based on the documentation:https://github.com/srikanth-lingala/zip4j I'm using the stream handling part of it. The code looks almost similar to the one from the documentation:
...ANSWER
Answered 2022-Mar-25 at 14:06Funny enough, this was on the local machine while I got OutOfMemoryError during the zip generation.
In testing environment, I got OutOfMemoryError during the retrieval of the documents. So Hibernate was complaining too. This was with a step before the generation. Probably this happened since local machine has 16GB and testing env only 1GB.
So the solution was build based on the following steps:
- retrieve the files in batches with Hibernate, and (flush/clean) transactional entityManager, in order to force Hibernate to not keep in memory all the files. The Batch size was: 50 documents.
- Adapt the code for the zip4j compression with Aws multipart upload, in order to compress and upload only one batch of files, and reset the buffers afterwards, to avoid OutOfMemory.
Step2 was designed and adapted based on: https://www.bennadel.com/blog/3971-generate-and-incrementally-stream-a-zip-archive-to-amazon-s3-using-multipart-uploads-in-lucee-cfml-5-3-7-47.htm
So the code from the initial question became as follows:
QUESTION
I want to generate a password protected zip file and then return to frontend. I am using spring boot and zip4j library. Able to generate zip file in backend service,but not able to send to frontend.
Service
...ANSWER
Answered 2022-Mar-11 at 09:06The below code worked for me.
QUESTION
Well, at the beginning of the Implementation of ItemTouchHelper, I chose to use only the Swipe function from it. Everything worked - with the help of Swipe I could delete items in RecyclerView etc. But then I thought I'd add up-down movement so that the user could change the order in which the item appears in the list.
Then the problems began - the user can change the order in which items are displayed, but can no longer:
- Scroll
RecyclerView(even if changing item up-down position is disabled) - Swipe functions have stopped working -
onSwipeddoes not return the side (ItemTouchHelper.LEFT, ItemTouchHelper.RIGHT) in which the item was swiped
I changed the View on which is trigger OnStartDragListener from _view to just ImageView and I can scroll now but there are now other problems:
- Swipe works on that ImageView too - I want to be able to swipe item whereever user click on item (_view)
- Swipe functions still doesn't work -
onSwipeddoes not return the side (ItemTouchHelper.LEFT, ItemTouchHelper.RIGHT) in which the item was swiped
FIXED
I Changed
...ANSWER
Answered 2021-Dec-25 at 15:17FIXED
I Changed
QUESTION
I've a simple Java code which creates a ZIP file using one CSV file. The code is working fine and produces the zip file just right. But, the zip file size(bytes) are different that the one I create using Windows zipping tool or something like 7zip. I need to know if there is any Java library which can create zip file similar to how windows zips the file.
Background - We send this zip file to a REST API which fails sometimes with 403 - Forbidden error but when we zip the file using windows zipper or 7zip, it works fine. So, I would like to know if there is any way to zip file in Java the way windows/7zip does.
I've tried -
- Inbuilt Java functions for zipping
- Apache commons compress
- zip4j
e.g.
...ANSWER
Answered 2021-Oct-11 at 10:20You are not really creating a zip file, you are creating a file with the .zip extension and simply copying to it the original CSV file value.
For creating a zip in Java you can follow this tutorial
QUESTION
I am developing a couple of integrations (as Maven projects) between several defect management systems, one of which exposes services through WSDL, forcing me to consume them through WS. For the latter I succesfully developed the code for JDK-8 and everything works.
I am now in the middle of JDK migration from 8 to 11 and need to update the integration that makes use of WS. I understood that in Java 11 some EE libraries (including JAX-WS) were removed. I then surfed the Web in order to get rid of this problem, but after a couple of days of tests and cut-and-paste of depenendencies I still have the same problem: cannot instantiate the WS to interact to the final server (that is a CA SDM 14.1).
Currently I have the following error:
...ANSWER
Answered 2021-Oct-01 at 16:39In the Oracle release notes for Java 11, I found this:
other-libs ➜ JEP 320 Remove the Java EE and CORBA Modules
Remove the Java EE and CORBA modules from the Java SE Platform and the JDK. These modules were deprecated in Java SE 9 with the declared intent to remove them in a future release (JEP 320).
The following modules have been removed from Java SE 11 and JDK 11:
QUESTION
I have inputstream of zip file , want to check if this inputstream is password protected or not . I have gone through this How to use zip4j to extract an zip file with password protection.
...ANSWER
Answered 2021-Aug-26 at 03:00Sorry, I don't think there is a library that will do exactly what you want.
zip4j
ZipFilecan only open aFileor aStringpathname.Java SE
ZipFilecan only open aFileor aStringpathname ... and doesn't support encrypted entries.Java SE
ZipInputStreamdoes support anInputStream, but doesn't support encrypted entries.Apache Commons
ZipFiledoes support seekable input streams (and channels), but notInputStream. And it doesn't understand encrypted entries.Apache Commons
ZipInputStreamworks with anyInputStreambut it doesn't understand encrypted entries.
So what are the options?
The simplest option would be to copy the InputStream contents to a temporary file and then use zip4j ZipFile as per the code in your question. When you are finished, delete the temporary file.
In theory, you ought to be able to use Java SE ZipInputStream and scan the entries to check the FileHeader for each file. (Bit zero of the "general purpose bit" field tells you if the file is encrypted.) The problem is that ZipEntry doesn't expose the information.
However, Apache's ZipInputStream class (which can read an InputStream!), exposes the general purpose bit field. So this would provide a way to test if any of the files in the ZIP is encrypted. If that is all you need, then you have another possible option.
QUESTION
I try to add a folder to a zip file but I always get a ZipException that the zip file is less than the expected size.
ANSWER
Answered 2021-Jul-07 at 08:07File.createTempFile("export_", ".zip") creates a file on disk while File("somefile.zip") only points to a file but does not create it.
zip4j seems to check if the file exists and if it exists it expects the file to be a valid zip file. That's why using ZipFile(file) fails if file was created with createTempFile().
QUESTION
I am in the process of converting a Java 11 project with JSP and JSF web sites from javax.* to jakarta.*. For this I ...
- updated Tomcat 9 to 10
- updated all dependencies to the latest versions (build.gradle dependencies see below)
- changed all imports (javax -> jakarta)
- updated config files (web.xml, beans.xml, context.xml, faces-config.xml see below)
But unfortunately Tomcat 10 won't start now (StackTrace see below). I only get it to start when I remove jakarta.faces from the dependencies, but then no JSF pages run anymore, only JSP. So this is not a solution.
Does anyone maybe have a good idea what is going wrong here?
Thanks!
Exceptions:
...ANSWER
Answered 2021-Jun-23 at 12:13primefaces 10.0.0 comes in two versions: a Java EE compatible one (default) and a Jakarta EE 9 version.
You need to add the jakarta classifier to select the second version:
QUESTION
This simple folder encryption/compression fails. The folder only contains a child folder and text file, yet encryption returns false. Any idea why?
...ANSWER
Answered 2021-Jun-19 at 16:45You forgot to pass zipParameters as second parameter in the zipFile.addFolder() call. If this is fixed, it works (s. also the zip4j docs):
QUESTION
Im trying to get the Headers from files in a zip file. I've found this code
...ANSWER
Answered 2021-May-01 at 23:37Instead of forEach, use a map() and add a default value for when nothing is found. Something like,
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Install zip4j
You can use zip4j like any standard Java library. Please include the the jar files in your classpath. You can also use any IDE and you can run and debug the zip4j component as you would do with any other Java program. Best practice is to use a build tool that supports dependency management such as Maven or Gradle. For Maven installation, please refer maven.apache.org. For Gradle installation, please refer gradle.org .
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