((WorkItem) workItem).setComments(comments);
((WorkItem) workItem).setState(IWorkItem.COMPLETED);
((WorkItem) workItem).setEndTime(rtCtx.getCalendarService()
.getSysDate());
persistenceService.saveOrUpdateWorkItem(workItem);
// 触发AFTER_WORKITEM_COMPLETE事件
TaskInstanceEvent e = new TaskInstanceEvent();
e.setSource(workItem.getTaskInstance());
e.setWorkflowSession(((IWorkflowSessionAware) workItem)