What is the fastest way to extract 1 file from a zip file which contain a lot of file?

Question

I tried the java.util.zip package, it is too slow.

Then I found LZMA SDK and 7z jbinding but they are also lacking something.

The LZMA SDK does not provide a ki

Answer 1

I have not benchmarked the speed but with java 7 or greater, I extract a file as follows.
I would imagine that it's faster than the ZipFile API:

A short example extracting META-INF/MANIFEST.MF from a zip file test.zip:

// file to extract from zip file
String file = "MANIFEST.MF";
// location to extract the file to
File outputLocation = new File("D:/temp/", file);
// path to the zip file
Path zipFile = Paths.get("D:/temp/test.zip");

// load zip file as filesystem
try (FileSystem fileSystem = FileSystems.newFileSystem(zipFile)) {
    // copy file from zip file to output location
    Path source = fileSystem.getPath("META-INF/" + file);
    Files.copy(source, outputLocation.toPath());
}