Set parameter compression

Artur — Mon, 20 Jan 2025 09:13:14 -0000

Hello, Boris! Help me, please) How to set compression parameters for an archive (compression method, dictionary size, word size, block size)

Unable to view files obtained after compression

Ilia S — Thu, 21 Dec 2023 11:21:14 -0000

It works correctly with FileOutputStream with parameter 'true'.

result = item.extractSlow(new ISequentialOutStream() {
                        @SneakyThrows
                        public int write(byte[] data) throws SevenZipException {
                            FileOutputStream wr = null;
                            try {
                                wr = new FileOutputStream("c:\\Users\\1\\tt.pdf", true);
                                wr.write(data);
                            } catch (FileNotFoundException e) {
                                // TODO Auto-generated catch block
                                e.printStackTrace();
                            } catch (IOException e) {
                                // TODO Auto-generated catch block
                                e.printStackTrace();
                            } finally {
                                if (wr != null) {
                                    wr.close();
                                }
                            }
                            }
                            }

Unable to view files obtained after compression

Ilia S — Thu, 21 Dec 2023 07:35:01 -0000

Please describe your decision. I faced the same problem.

Thanks

Child files names contains ¥ [YEN SIGN] are not retain once we extract file on Linux

Hardik — Fri, 16 Sep 2022 06:06:28 -0000

please refer this file for extraction :

Child files names contains ¥ [YEN SIGN] are not retain once we extract file on Linux

Hardik — Thu, 15 Sep 2022 13:21:39 -0000

Hi ,
I am trying to extract files from ZIP which contains ¥ [YEN SIGN] on Linux machine . surprisingly , child files contains ¥ are replaced by [space]/[square] .
Referred example : https://gist.github.com/borisbrodski/6120309
I had tried possible approached to change character BY :

if(path.contains("")){
    path = path.replaceAll("", "¥");
}

and

try {
    byte[] charset = path.getBytes("UTF-8");
    path = new String(charset, "UTF-8");
}catch (UnsupportedEncodingException e1) {
    throw new SevenZipException("Error while converting String to UTF-8: " + file.getAbsolutePath());
}

please advice and help how to solve this issue , i have used

<dependency>
    <groupId>net.sf.sevenzipjbinding</groupId>
    <artifactId>sevenzipjbinding</artifactId>
    <version>16.02-2.01</version>
</dependency>
<dependency>
    <groupId>net.sf.sevenzipjbinding</groupId>
    <artifactId>sevenzipjbinding-all-platforms</artifactId>
    <version>16.02-2.01</version>
</dependency>

JVM crashes java/lang/NoClassDefFoundError': net/sf/sevenzipjbinding/ExtractAskMode> (0x00000005ea79e890) thrown at [/home/ec2-user/workspace/zulu8-build-linux64/zulu-src.git/hotspot/src/share/vm/classfile/systemDictionary.cpp, line 209]

akanksha — Mon, 01 Aug 2022 10:21:22 -0000

please find attachment JVM crashes giving error java/lang/NoClassDefFoundError': net/sf/sevenzipjbinding/ExtractAskMode> (0x00000005ea79e890) thrown at [/home/ec2-user/workspace/zulu8-build-linux64/zulu-src.git/hotspot/src/share/vm/classfile/systemDictionary.cpp, line 209]. sevenzipbinding 16.02-2.01
version i am using both jar present in classpath. still its giving such error. could you please why this is giving such error.
@Override
boolean scan(String fileName, InputStream inputStream) throws AttachmentException {
ByteArrayStream byteStream = null;
IInArchive inArchive =null;
InputStream is = null;
try {
inputStream.mark(Integer.MAX_VALUE);
byte[] byteArray = IOUtils.toByteArray(inputStream);
byteStream = new ByteArrayStream(byteArray, false);
inputStream.reset();
inArchive = SevenZip.openInArchive(null, byteStream);
for (ISimpleInArchiveItem item : inArchive.getSimpleInterface().getArchiveItems()) {
byte[] byteData = getInputStream(item);
if (byteData != null) {
is = new ByteArrayInputStream(byteData);
boolean result = super.scan(item.getPath(), is);
if (!result) {
return result;
}
}
}
} catch (Exception e) {
// logging exception

    } finally {
        try {
            if (inArchive != null) {
                inArchive.close();
            }
        } catch (IOException e) {
            // logging exception
        }
        try {
            if (is != null) {
                is.close();
            }
        } catch (IOException e) {
            // logging exception
        }
    }
    return true;
}

private byte[] getInputStream(ISimpleInArchiveItem item) throws SevenZipException {
  final byte[][] byteArray= new byte[1][];
    item.extractSlow(new ISequentialOutStream() {
        @Override
        public int write(byte[] data) throws SevenZipException {
           byteArray[0]  = data;
            return data.length; // Return amount of consumed data
        }
    });        
    return byteArray[0];
}

Multi threaded error

Henry Carhuas Balvin — Sat, 28 May 2022 06:41:09 -0000

Hi Boris.

In case, thank you very much for all your contribution with this solution.

I have been facing a problem in the simultaneous execution of my project when trying to compress different files in different executions. And getting a FATAL ERROR that doesn't let me catch the error or be able to do anything.

I have tried these 2 actions.

1) Instantiate the 7Zip object only once when starting my project. SevenZip.initSevenZipFromPlatformJAR();

2) Add execution parameters to the Java -Jar command like these:

java -XX:+AlwaysPreTouch -XX:+TieredCompilation -XX:NewRatio=1 -XX:+UseConcMarkSweepGC -XX:MaxMetaspaceSize=1024m -XX:ParallelGCThreads=2 -XX:ConcGCThreads=2 -XX:MaxTenuringThreshold=15 -jar GetFilesMetadataControl_7z. jar

Without achieving any positive result. I hope I can have your support in some kind of solution or mistake that I am making.

I attach the class where the lines that do the compression are.

Thanks and best regards.

ISimpleInArchiveItem.getPath() for BZIP2

Astha — Mon, 11 Apr 2022 10:22:50 -0000

Thanks, I'm able to extract gzip and bzip2 files now with your help.

ISimpleInArchiveItem.getPath() for BZIP2

Boris Brodski — Fri, 08 Apr 2022 11:18:41 -0000

Hey, how did you solve it?

There is nothing to solve. It works like this:

You have test.txt file
When you compress your file to bzip2 you get test.txt.bz2
In the file content there is no name "test.txt" encoded

This means, if you rename your file to abc.bz2 it will be not possible to recover the
original name "test.txt". Extracting "abc.bz2" with 7z would you give file "abc", not "test.txt".

I hope, it helps clarify situation.

decompress .taz File with 7-Zip-JBinding

Boris Brodski — Thu, 07 Apr 2022 08:29:18 -0000

Actually, it should be pretty straight forward. Just extract gz into a temporary file, then open it and extract again.

Recent posts to Discussion

Set parameter compression

Unable to view files obtained after compression

Unable to view files obtained after compression

Child files names contains ¥ [YEN SIGN] are not retain once we extract file on Linux

Child files names contains ¥ [YEN SIGN] are not retain once we extract file on Linux

JVM crashes java/lang/NoClassDefFoundError': net/sf/sevenzipjbinding/ExtractAskMode> (0x00000005ea79e890) thrown at [/home/ec2-user/workspace/zulu8-build-linux64/zulu-src.git/hotspot/src/share/vm/classfile/systemDictionary.cpp, line 209]

Multi threaded error

ISimpleInArchiveItem.getPath() for BZIP2

ISimpleInArchiveItem.getPath() for BZIP2

decompress .taz File with 7-Zip-JBinding