How To Uncompress

Open ZIP Archives in Windows: Double-click a ZIP file in Windows to, you'll see a few unique. Right click or press and hold on one or more selected files and folders that you want to compress. In Windows, you work with zipped files and folders in the same way that you work with uncompressed files and folders. Combine several files into a single zipped folder to more easily share a group of files. To zip (compress) a file or folder To unzip (extract) files or folders from a zipped folder.

1. Overview

In this quick tutorial, we'll discuss how to zip a file into an archive and how to unzip the archive – all using core libraries provided by Java.

These core libraries are part of the java.util.zip package – where we can find all zipping and unzipping related utilities.

2. Zip a File

How to find minecraft files on windows 10. Let's first have a look at a simple operation – zipping a single file.

For our example here we'll zip a file named test1.txt into an archived named compressed.zip.

We'll of course first access the file from disk – let's have a look:

3. Zip Multiple Files

Next, let's see how to zip multiple files into one zip file. We will compress test1.txt and test2.txt into multiCompressed.zip: How to update logic pro x 10 4 7.

4. Zip a Directory

Now, let's discuss how to zip an entire directory. We will directory zipTest into dirCompressed.zip :

4. Zip a Directory

Now, let's discuss how to zip an entire directory. We will directory zipTest into dirCompressed.zip :

Note that:

• To zip sub-directories, we iterate through them recursively.
• Every time we find a directory, we append its name to the descendants ZipEntry name to save the hierarchy.
• We also create a directory entry for every empty directory

5. Unzip an Archive

Let's now unzip an archive and extract its contents.

For this example, we'll unzip compressed.zip into a new folder named unzipTest.

Let's have a look:

Inside the while loop, we'll iterate through each ZipEntry and first check if it's a directory. If it is, then we'll create the directory using the mkdirs() method; otherwise, we'll continue with creating the file:

One note here is that on the else branch, we're also checking first if the parent directory of the file exists. This is necessary for archives created on Windows, where the root directories don't have a corresponding entry in the zip file.

How To Uncompress Zip

Another key point can be seen in the newFile() method:

This method guards against writing files to the file system outside of the target folder. This vulnerability is called Zip Slip and you can read more about it here.

6. Conclusion

This tutorial illustrated how we can use Java libraries for the operations of zipping and unzipping files.

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The implementation of these examples can be found over on GitHub.

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