升级到3.6.0后关于UUID的警告
原来的UUIDHexGenerator已不推荐使用，应用UUIDGenerator替代。
@GenericGenerator(name = "system-uuid", strategy = "uuid")
改为
@GenericGenerator(name = "system-uuid", strategy = "org.hibernate.id.UUIDGenerator")

//--------------------------------------------------------------------- @Id @GeneratedValue(generator = "system-uuid") @GenericGenerator(name = "system-uuid", strategy = "org.hibernate.id.UUIDGenerator") //---------------------------------------------------------------------

//--------------------------------------------------------------------- @GenericGenerator(name = "generator", strategy = "org.hibernate.id.UUIDGenerator") @Id @GeneratedValue(generator = "generator") //---------------------------------------------------------------------

以前版本:
http://lipeng88213.iteye.com/blog/556010
http://blog.sina.com.cn/s/blog_694448320100o2zd.html

主键详解:
http://hi.baidu.com/zhaoyu1988312/blog/item/e9155b303df7f48fa8018e7c.html