org.activiti.engine.impl.javax.el
接口 
ELContextListener
 
ArrayELResolver
BeanELResolver
BeanELResolver.BeanProperties
BeanELResolver.BeanProperty
CompositeELResolver
DynamicBeanPropertyELResolver
ELContext
ELContextEvent
ELResolver
Expression
ExpressionFactory
FunctionMapper
ListELResolver
MapELResolver
MethodExpression
MethodInfo
ResourceBundleELResolver
ValueExpression
ValueReference
VariableMapper
异常 
ELException
MethodNotFoundException
PropertyNotFoundException
PropertyNotWritableException