unzip
使用标准的MATLAB函数是不可能的,但是...让该函数破解以使其能够执行所需的操作!
unzip
单文件黑客使用来自MATLABunzip()
和的代码extractArchive()
(从中调用unzip()
),可以创建一个自定义函数以仅从zip存档中提取单个文件。
function [] = extractFile(zipFilename, outputDir, outputFile)
% extractFile
% Obtain the entry's output names
outputName = fullfile(outputDir, outputFile);
% Create a stream copier to copy files.
streamCopier = ...
com.mathworks.mlwidgets.io.InterruptibleStreamCopier.getInterruptibleStreamCopier;
% Create a Java zipFile object and obtain the entries.
try
% Create a Java file of the Zip filename.
zipJavaFile = java.io.File(zipFilename);
% Create a java ZipFile and validate it.
zipFile = org.apache.tools.zip.ZipFile(zipJavaFile);
% Get entry
entry = zipFile.getEntry(outputFile);
catch exception
if ~isempty(zipFile)
zipFile.close;
end
delete(cleanUpUrl);
error(message('MATLAB:unzip:unvalidZipFile', zipFilename));
end
% Create the Java File output object using the entry's name.
file = java.io.File(outputName);
% If the parent directory of the entry name does not exist, then create it.
parentDir = char(file.getParent.toString);
if ~exist(parentDir, 'dir')
mkdir(parentDir)
end
% Create an output stream
try
fileOutputStream = java.io.FileOutputStream(file);
catch exception
overwriteExistingFile = file.isFile && ~file.canWrite;
if overwriteExistingFile
warning(message('MATLAB:extractArchive:UnableToOverwrite', outputName));
else
warning(message('MATLAB:extractArchive:UnableToCreate', outputName));
end
return
end
% Create an input stream from the API
fileInputStream = zipFile.getInputStream(entry);
% Extract the entry via the output stream.
streamCopier.copyStream(fileInputStream, fileOutputStream);
% Close the output stream.
fileOutputStream.close;
end
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