实现方案举例：
1、创建实现类com.wwk.demo.TestAssignmentEvenImpl （自定义的）实现 com.kingdee.bos.workflow.enactment.handler.IAssignmentEventHandler接口，重写execute方法
public class TestAssignmentEvenImpl implements IAssignmentEventHandler{
private static final long serialVersionUID = 1L;
@Override
public void execute(AssignmentEvent event, IWfAssignment assignment) {
// TODO Auto-generated method stub
if(AssignmentEvent.OnAssignmentCreated.equals(event)){
/**
* 提示：
* 1. 拿到待办任务对象
* assignment.getAssignmentInfo();
* 2. 拿到服务端上下文
* com.kingdee.bos.workflow.enactment.WfAssignment wfa = (WfAssignment)assignment;
* Context ctx = wfa.getContext();
*/
}
}
}2、在这里配置监听的事件名和实现类(eas\server\properties\wf_events.xml)
如（任务创建时事件OnAssignmentCreated）：
