MATLAB: Selective unzipping of files

Question

I would like to selectively unzip a file within a large zipped folder without having to unzip the entire folder due to its size. It looks like I can do this through the MATLAB GUI; however, I need to automate this through code. I understand that I can do this in python by loading the zip file as an object and specifying in that object which file we would to exact. Is there a way to do something similar in MATLAB or is there simply an approach that can achieve the same result?

Answer 1

You will need to use java if you wish to extract only specified files

You can refer to java documentations at the following link.

ZipFile Java documentation

zipFilename = 'abc.zip';
zipJavaFile  = java.io.File(zipFilename);
zipFile = org.apache.tools.zip.ZipFile(zipJavaFile);
% entries = zipFile.getEntries; % to get all entries then iterate
entry = zipFile.getEntry​('abcfolder/abcfile.txt'); % empty if not found
if(~isempty(entry))
    inputstream = zipFile.getInputStream​(entry);
    outJavaFile = java.io.File(fullfile(pwd,'abcfolder/abcfile.txt'));
    outStream = java.io.FileOutputStream(outJavaFile);
    copier = com.mathworks.mlwidgets.io.InterruptibleStreamCopier.getInterruptibleStreamCopier;
    copier.copyStream(inputstream, outStream);
    outStream.close();
end
zipFile.close();