在开发中还是应该注意一下这个问题:
Methods Not Allowed in Container-Managed Transactions
You should not invoke any method that might interfere with the transaction boundaries set by the container. The list of prohibited methods follows:
The commit, setAutoCommit, and rollback methods of java.sql.Connection
The getUserTransaction method of javax.ejb.EJBContext
Any method of javax.transaction.UserTransaction
You may, however, use these methods to set boundaries in bean-managed transactions.
请参照:http://java.sun.com/j2ee/tutorial/1_3-fcs/doc/Transaction3.html#63023