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lzstring4j - LZString for Java

lzstring4j is an easy to use implementation of JavaScript LZString Library for Java.

This idea is inspired by lz-string-java.

Features:

  • Based on JavaScript LZString Library (version 1.3.3)
  • UTF-16 compression
  • Base64 compression
  • Interoperable with the JavaScript Library through the UTF-16 compression methods (Java Server -> JS on Web or Node.js server -> Java Client/Android) thanks to this post.

How to use

Using lzstring4j is quite simple. But lets see:

Checkout and compile the project:

git clone https://github.com/diogoduailibe/lzstring4j.git
cd lzstring4j
mvn clean install

Then, import in your project using maven dependecy

<dependency>
	<groupId>com.github.diogoduailibe</groupId>
	<artifactId>lzstring4j</artifactId>
	<version>1.3.3</version>
</dependency>

Afterwards, you'll be able to use this library:

Normal Compression and Decompression:

	   // Normal Compression and Decompression
		String test = "Lets see how much we can compress this string!";

		String output = LZString.compress(test);

		System.out.println("Compressed: " + output);

		String decompressed = LZString.decompress(output);
		
		System.out.println("Decompressed: " + decompressed);

UTF-16 Compression and Decompression:

		//UTF-16 Compression and Decompression 
		String testUTF16 = "Lets see how much we can compress this string!";

		String outputUTF16 = LZString.compressToUTF16(testUTF16);

		System.out.println("Compressed: " + outputUTF16);

		String decompressedUTF16 = LZString.decompressFromUTF16(outputUTF16);
		
		System.out.println("Decompressed: " + decompressedUTF16);

Base64 Compression and Decompression:

		//Base64 Compression and Decompression 
		String testBase64 = "Lets see how much we can compress this string!";

		String outputBase64 = LZString.compressToBase64(testBase64);

		System.out.println("Compressed: " + outputBase64);

		String decompressedBase64 = LZString.decompressFromBase64(outputBase64);
		
		System.out.println("Decompressed: " + decompressedBase64);

Tests

In order to run JUnit tests, just run:

mvn test

You'll see tests for Normal, UTF-16 and Base64 compression and decompression.

Checkout

git clone https://github.com/diogoduailibe/lzstring4j.git

Building

to build a jar-file:

cd $PATH_TO_LZSTRING4J
mvn clean package
ls target/lzstring4j-<version>.jar

You'll find it in target path

Bugs

Please report any bugs feature requests to the Github issue tracker

Frameworks

This Library was designed with portability in mind.

  • Android is fully supported.
  • JRE is fully supported.

TODO

  • Improve code to execute more efficiently
  • Update to version 1.4.4
  • More tests...

CONTRIBUTORS (Thanks to all, by the way!)

License - the boring stuff...

See LICENSE file.

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LZ-based compression algorithm for Java

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