hibernate 关系映射指南

在网上看到一个比较好的O/R指南 http://www.xylax.net/hibernate/
1. Simple Association (one to one)

2. Simple Reference (many to one)

3. Basic Collection (one to many)

4. Collection (many to many)

5. Collection (raw data)

6. Top-level Collections

7. Map

8. Entity Map

9. Subclasses

10. Joined Subclasses

11. Components

12. Collections of Components

13. Composite Id

14. Composite Index

15. Ternary Associations