Java read rar file

RAR archives with java

The raroscope is a Java library that can be used to scan and list the contents of RAR archives. If you need to extract a RAR file in Java, you can use this library. For instance, if you have a directory that includes various items such as folders and RAR files, the raroscope library can help you extract the contents of the RAR files.

RAR archives with java

Can anyone suggest a reliable Java API for handling RAR archive files? I have searched on Google, but I haven’t found anything particularly convincing.

Consider using JUnRar, a pure Java» (quoting API for handling RAR files, which is available on the mentioned website.

Another fork of an old SF project exists, which is derived from the answer provided by @Fabian.

I think this will help you.

This is a Java-based library that allows for the scanning and enumeration of the contents of RAR archives.

How to install minecraft map RAR file, 7zip: http://www.7-zip.org/download.htmlmap: http://www.minecraftmaps.com/city-maps/vill-dream

How to turn a winrar file into a java file

made with ezvid, free download at http://ezvid.com In this tutorial i show you how to change a winrar file into a java file.

How to Fix Jar files opening as WinRAR Files!

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How to open a file with *Java* instead of winRar

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Java: Unrar rar file with java command

I am attempting to extract a file in Java, specifically rar file , and would like the option to choose where the file is extracted. Despite my efforts to find a suitable library, I have not had any success. Consequently, I attempted to use the Runtime.getRuntime().exec() command in conjunction with the official Rarlabs program. While it was possible to extract the file in the terminal, the same command did not work when implemented in the code. I am unsure if this is the most effective method or if there is an alternative approach I should consider. Additionally, I am unsure of what mistake I may be making with the Runtime command. Below is a sample code that has not yielded the desired outcome.

Process p = Runtime.getRuntime().exec("cd ~/Desktop/testfolder && /usr/local/bin/unrar x ~/Desktop/test.rar"); 

To avoid buffer overflow on subprocess’s stdout , make sure to use ProcessBuilder and call inheritIO() on it before building your process. By default, the subprocess’s stdout is piped into an InputStream , which you must drain.

Rar — Un-rarring with java?, In a piece of my code, I want to download a .rar (archive) file in a certain folder and unrar it, rather than download all the files one by one. However, …

How to recursively list all .rar files in a directory

My intention is to display all the files with the .rar code that are present in a folder and its subfolders until there are no more folders to search.

The following code is what I am presently utilizing:

private String getFileNums(File file) < if (file.isDirectory()) < File[] list = file.listFiles(new FilenameFilter() < @Override public boolean accept(File file, String s) < return s.toLowerCase().endsWith(".rar"); >>); int count = 0; if (list != null) < for (File f : list) < if (f.isDirectory()) < getFileNums(f); >else < count++; >> > return "Number of rar files in this folder and subfolders is " + count; > else < long length = file.length(); return "File size in bytes is " + length;); >> 

The issue with this code is that it only displays the .rar files located in the main folder and not in the subdirectories.

Suppose we have a folder named House that contains different types of files such as Bedroom (folder), Kitchen (folder), chair.rar (rar file), and door.rar (rar file). However, the code mentioned above only displays chair.rar and door.rar , and it does not show the rar files files present in the Bedroom and Kitchen folders.

Is there any place where this can be repaired?

Your FilenameFilter is causing the issue as it is also excluding directories that do not have a «.rar» extension in their name. This results in the exclusion of most directories. You need to modify the filter to let them pass.

Upon reviewing your comment, I noticed that your code lacks the necessary connection for the recursion to work properly.

int count = 0; if (f.isDirectory()) < // Nothing comes out of the recursive call. // The result is completely lost getFileNums(f); >

For a method that recursively counts the number of RAR files, it is preferable to return int instead of String .

private int getFileNums(File file) < if (file.isDirectory()) < File [] files = file.listFiles(); if (files != null) < int count = 0; for (File f : files) < if (f.isDirectory()) < count += getFileNums(f); >else if (f.getName().toLowerCase().endswith(".rar")) < count++; >> return count; > else < return 0; >> else < throw new IllegalArgumentException("Expecting a directory."); >> 

In case you are utilizing Java version 8.

import java.nio.file.*; long numOfRar = Files.walk(file.toPath(), FileVisitOption.FOLLOW_LINKS) .filter(p->p.toString().toLowerCase().endsWith(".rar")) .count(); 

In my opinion, it is simpler to comprehend concepts when presented in pseudocode.

processDirectory(thisDir) for each entry in thisDir if (entry is directory) processDirectory(entry) // Recurse. else if (entry is .rar file) processRarFile(entry) endif endfor end 

As mentioned by Luke, the pattern in your code is not a match.

Java — How to execute a .RAR file, I have tried two ways of executing it. First Attempt: After viewing the rar contents, I figured out that it has proper manifest file (Stating the main class …

Extracting a file with JUnrar

Earlier, I inquired about the archives in Java with the hashtag extracting RAR . A helpful person suggested using JUnrar, which despite the official site being down, appears to be widely used based on the numerous online discussions found on the topic.

I am looking for assistance with JUnrar to extract all files from an archive. Although I came across a code online, it is not functional as it considers every item in the archive as a directory, regardless of it being a file.

 Archive rar = new Archive(new File("C://Weather_Icons.rar")); FileHeader fh = rar.nextFileHeader(); while(fh != null) < if (fh.isDirectory()) < logger.severe("directory: " + fh.getFileNameString() ); >//File out = new File(fh.getFileNameString()); //FileOutputStream os = new FileOutputStream(out); //rar.extractFile(fh, os); //os.close(); fh=rar.nextFileHeader(); > 

Perhaps taking a look at this code snippet, which is provided below, would also be beneficial.

public class MVTest < /** * @param args */ public static void main(String[] args) < String filename = "/home/rogiel/fs/home/movies/vp.mp3.part1.rar"; File f = new File(filename); Archive a = null; try < a = new Archive(new FileVolumeManager(f)); >catch (RarException e) < // TODO Auto-generated catch block e.printStackTrace(); >catch (IOException e) < // TODO Auto-generated catch block e.printStackTrace(); >if (a != null) < a.getMainHeader().print(); FileHeader fh = a.nextFileHeader(); while (fh != null) < try < File out = new File("/home/rogiel/fs/test/" + fh.getFileNameString().trim()); System.out.println(out.getAbsolutePath()); FileOutputStream os = new FileOutputStream(out); a.extractFile(fh, os); os.close(); >catch (FileNotFoundException e) < // TODO Auto-generated catch block e.printStackTrace(); >catch (RarException e) < // TODO Auto-generated catch block e.printStackTrace(); >catch (IOException e) < // TODO Auto-generated catch block e.printStackTrace(); >fh = a.nextFileHeader(); > > > > 

Jar files in Java, A JAR (Java Archive) is a package file format typically used to aggregate many Java class files and associated metadata and resources (text, …

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README.md

Read and extracts from a .rar file. This is a fork of the junrar codebase, formerly on sourceforge.

Code may not be used to develop a RAR (WinRAR) compatible archiver.

• RAR 4 and lower (there is no RAR 5 support)
• password protected archives (also with encrypted headers)
• multi-part archives
• extract from File and InputStream
• extract to File and OutputStream

implementation "com.github.junrar:junrar:"

implementation("com.github.junrar:junrar:")

dependency> groupId>com.github.junrargroupId> artifactId>junrarartifactId> version> version> dependency>

where corresponds to version as below:

Apache Commons VFS support has been removed from 5.0.0 , and moved to a dedicated repo: https://github.com/junrar/commons-vfs-rar

Extract from a file to a directory:

Junrar.extract("/tmp/foo.rar", "/tmp"); //or final File rar = new File("foo.rar"); final File destinationFolder = new File("destinationFolder"); Junrar.extract(rar, destinationFolder); //or final InputStream resourceAsStream = Foo.class.getResourceAsStream("foo.rar");//only for a single rar file Junrar.extract(resourceAsStream, tempFolder);

Extract from an InputStream to an OutputStream

// Assuming you already have an InputStream from the rar file and an OutputStream for writing to final Archive archive = new Archive(inputStream); while (true) < FileHeader fileHeader = archive.nextFileHeader(); if (fileHeader == null) < break; > archive.extractFile(fileHeader, outputStream); >

Extract from an InputStream to an InputStream

// Assuming you already have an InputStream from the rar file and an OutputStream for writing to final Archive archive = new Archive(inputStream); while (true) < FileHeader fileHeader = archive.nextFileHeader(); if (fileHeader == null) < break; > try (InputStream is = archive.getInputStream(fileHeader)) < // Then use the InputStream for any method that uses that as an input, ex.: Files.copy(is, Paths.get("destinationFile.txt")); > >

final ListContentDescription> contentDescriptions = Junrar.getContentsDescription(testDocuments);

Extract a password protected archive

Junrar.extract("/tmp/foo.rar", "/tmp", "password"); //or final File rar = new File("foo.rar"); final File destinationFolder = new File("destinationFolder"); Junrar.extract(rar, destinationFolder, "password"); //or final InputStream resourceAsStream = Foo.class.getResourceAsStream("foo.rar");//only for a single rar file Junrar.extract(resourceAsStream, tempFolder, "password");

Extract a multi-volume archive

Junrar.extract("/tmp/foo.001.rar", "/tmp");

Junrar allows for some tuning using System Properties:

• Options for Archive#getInputStream(FileHeader) :
  • junrar.extractor.buffer-size : accepts any positive integer. Defaults to 32 * 1024 .
    • Sets the maximum size used for the dynamic byte buffer in the PipedInputStream .
    • If true , it uses a cached thread pool for extracting the contents, which is generally faster.
    • If false , it will create a new thread on each call. This may be slower, but may require slightly less memory.
    • Options for tuning the thread pool:
      • junrar.extractor.max-threads : accepts any positive integer. Defaults to 2^31 .
        • Sets the maximum number of threads to be used in the pool. By default, there is no hard limit on the number of threads, but they are only created when needed, so the maximum should not exceed the number of threads calling this method at any given moment. Use this if you need to restrict the number of threads.
        • Sets the number of seconds a thread can be kept alive in the pool, waiting for a next extraction operation. After that time, the thread may be stopped.

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