如何将需要的文件从 rar 存档直接读取到 InputStream（不提取整个存档）？

Question

Seems quite simple with zip archive using java.util.zip.ZipFile like this:

public static void main(String[] args) throws IOException 
{
    final ZipFile zipFile = new ZipFile("C:/test.zip");

    final Enumeration<? extends ZipEntry> entries = zipFile.entries();

    while(entries.hasMoreElements())
    {
        final ZipEntry entry = entries.nextElement();

        if(entry.getName().equals("NEEDED_NAME"))
        {
            try(InputStream inputStream = zipFile.getInputStream(entry))
            {
                // Do what's needed with the inputStream.
            }
        }
    }
}

What would be the alternative for rar archives?

I'm aware of Junrar, but didn't found a way to do it without extracting whole archive to some folder.

Edit:

I have added "if sentence for entry.getName()" line just to indicate what I'm interested only in some specific files inside archive and would like to avoid extracting whole archive to some folder and later deleting those files.

Answer 1

I end up using something like this for now (with Junrar):

final Archive archive = new Archive(new File("C:/test.rar"), null);

final LocalFolderExtractor lfe = new LocalFolderExtractor(new File("/path/to/temp/location/"), new FileSystem());

for (final FileHeader fileHeader : archive)
{
    if(fileHeader.getFileNameString().equals("NEEDED_NAME"))
    {
         File file = null;

         try
         {
             file = lfe.extract(archive, fileHeader);

             // Create inputStream from file and do what's needed.
         }
         finally
         {
             // Fully delete the file + folders if needed.
         }
    }
}

Maybe there is a better way :)