JTA Entity JPA 事务(Transaction) 会话(Conversation)

JTA 深度历险 - 原理与实现
JTA使用
EntityManager使用方法 - merge/flush/createNaiveQuery
EntityManager方法简介
EJB之JPA(EntityManager — 类似于3千问)
bean的写法-JPA实体的映射
J2EE持久层持久化上下文的传播以及会话(Conversation)实现

@OneToMany、@ManyToOne
@OneToMany、@ManyToOne以及@ManyToMany
@OneToMany、@ManyToOne例子

EntityManager 详解

Hibernate-JPA-Derby

http://hibernate-jpa-derby-example.blogspot.com/
http://michaljedynak.blogspot.com/2013/01/hibernate-jpa-sample-project.html
http://stackoverflow.com/questions/12688162/java-standalone-app-with-jpa-hibernate-or-similar-and-apache-derby-embedded
http://www.javatips.net/blog/hibernate-jpa-with-derby