这个例子对基于JTA的事务处理的实现进行了讨论，其中事务对象UserTransaction在EJB组件中执行，其实事务对象UserTransaction也可以在客户端使用-based on the example of the JTA transaction processing for the realization of the discussion, Services which UserTransaction object in the implementation of EJB. In fact Affairs UserTransaction object can be used in the client