| Title: Apache Velocity Engine Dependencies |
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| ## Velocity Dependencies |
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| Since 2.1, Velocity Engine requires Java 1.8+. |
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| When building from sources, Maven should fetch all needed dependencies. At runtime, velocity only needs commons-lang, slf4j-api, and one of the slf4j bindings. |
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| The following table lists all needed jars. |
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| Jar name | Version | Compilation | Tests | Runtime | Comment |
| ---------|---------|---------|-------|-------------|-------- |
| slf4j-api | 1.7.30 | Yes | Yes | Yes | you'll also need an slf4j binding at runtime |
| commons-lang | 3.8.1 | Yes | Yes | Yes | |
| junit | 4.13 | No | Yes | No | |
| hsqldb | 2.5.0 | No | Yes | No | |
| commons-io | 2.6 | No | Yes | No | |
| slf4j-simple | 1.7.30 | No | Yes | No | Your application will need *one* SLF4J binding, see below |
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| Here is a list of slf4j bindings: |
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| + [AVSL](http://software.clapper.org/avsl/) - “A Very Simple Logger” |
| + [SLF4J JDK14 Adapter](http://www.slf4j.org/api/org/slf4j/impl/JDK14LoggerAdapter.html) - redirect logs towards Java 1.4+ logging framework |
| + [SLF4J Log4J Adapter](http://www.slf4j.org/api/org/slf4j/impl/Log4jLoggerAdapter.html) - redirects logs towards Log4J |
| + [SLF4J Simple Logger](http://www.slf4j.org/api/org/slf4j/impl/SimpleLogger.html) - minimalistic logger |
| + [SLF4J Android](http://www.slf4j.org/android/) - logger for Android platforms |
| + [LogBack](http://logback.qos.ch/) - full featured logging framework |
| + [WebApp SLF4J Logger](https://github.com/arkanovicz/webapp-slf4j-logger) - redirects logs towards the J2EE container log |
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