given a zip file with multiple nested directory structure, how do I unzip it into the same tree structure?

does ZipFile.entries() provide the enumeration in any order?

解決方案

Zip doesn't offer directory structure per se. The tree alike structure is built by having full path of each entry. ZipFile enumerates the entries in the same way they have been added to the file.

Note: java.util.ZipEntry.isDirectory() just tests if the last character of the name is '/', that's how it works.

What you need to extract the files into the same directory. Parse then name like that:

for(ZipEntry zipEntry : java.util.Collections.list(zipFile.entries())){//lazislav

String name = zipEntry.getName();

int idx = name.lastIndexOf('/');

if (idx>=0) name=name.substring(idx)

if (name.length()==0) continue;

File f = new File(targetDir, name);

}

That shall do it more or less (you still need to take care of duplicate file names, etc)

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