Easy Rules
The simple, stupid rules engine for Java
...This means only bug fixes will be addressed from now on. Version 4.1.x is the only supported version. Please consider upgrading to this version at your earliest convenience. Lightweight library and easy-to-learn API. POJO-based development with an annotation programming model. Useful abstractions to define business rules and apply them easily with Java. The ability to create composite rules from primitive ones. The ability to define rules using an Expression Language (Like MVEL, SpEL and JEXL)