Activiti部署流程文件时提示如下异常：

org.activiti.engine.ActivitiIllegalArgumentException: unknown type 'String' reason

相关部分代码如下：

<startEvent id="start" name="StartEvent" activiti:initiator="applyUserId">
    	<extensionElements>
    		<activiti:formProperty id="startDate" name="startDate" type="date" datePattern="yyyy-MM-dd" required="true" writable="true" readable="true"/>
    		<activiti:formProperty id="endDate" name="endDate" type="date" datePattern="yyyy-MM-dd" required="true" writable="true" readable="true"/>
    		<activiti:formProperty id="reason" name="reason" type="String" required="true" writable="true" readable="true"/>
    	</extensionElements>
    </startEvent>

原因分析：activit中form表单字段属性中类型type的值全为小写，而reasontype属性的值为“String”

解决办法：将对应字段（此处为reason）的type属性的值改为“string”即可