org.activiti.engine.ActivitiException: Can't find scripting engine for 'groovy'

最近在学习activiti，运行《activiti实战》中的SayHelloToLeaveTest代码时，结果出现了“org.activiti.engine.ActivitiException: Can't find scripting engine for 'groovy'”异常，下面给出解决方案：

修改pom.xml文件中groovy依赖，以

    <dependency>
     <groupId>org.codehaus.groovy</groupId>
     <artifactId>groovy-all</artifactId>
     <version>2.4.7</version>
   </dependency>

取代下面的依赖即可:

<dependency>
<groupId>org.codehaus.groovy</groupId>
<artifactId>groovy</artifactId>
<version>2.4.5</version>
</dependency>