From http://www.ibm.com/developerworks/cn/websphere/library/techarticles/0809_alcott/0809_alcott.html    

1. 引入IOC 和 Annotation 编程模型注入指定的对象和资源
   1. @EJB  
   2. @WebService, JAX-WS    
2. EJB -> POJO, JPA, EJB3.0 Entity Bean