方式有兩種：

1）修改配置檔案hibernate.cfg.xml實現

<hibernate-configuration>

	<session-factory>

		......

		<!--  事務隔離級別 
			0：TRANSACTION_NONE
			1：TRANSACTION_READ_UNCOMMITTED
			2：TRANSACTION_READ_COMMITTED
			4：TRANSACTION_REPEATABLE_READ
			8：TRANSACTION_SERIALIZABLE
		-->
		<property name="hibernate.connection.isolation">4</property>

		......

	</session-factory>

</hibernate-configuration>
 

2）程式碼方式

Session session = sessionFactory.openSession();
session.connection().setTransactionIsolation(Connection.TRANSACTION_READ_UNCOMMITTED);