1. straight Jdbc
trivial app, report app
2. Hibernate
session -------- Persistent Manager
hibernate.cfg.xml
3. iBatis:
SqlMap ------- Persistent Manager
SqlMapConfig.xml
4. EJB 3 entity bean
5. Spring jdbc template
相关资源：英文原版-PHP Persistence Concepts Techniques and Practical Solutions with Doctrine 1st Edition
