jess的基础学习资料 很全面的 学习非常给力 英文版的-Jess is a rule engine for the Java platform. To use it, you specify logic in the form of

rules using one of two formats: the Jess rule language (prefered) or XML. You also

provide some of your own data for the rules to operate on. When you run the rule

engine, your rules are carried out. Rules can create new data, or they can do anything

that the Java programming language can do.