ejbCreate函数用于初始化一个EJB实例，演示Address EJB的实现，创建一个EJB测试客户端，得到名字上下文，查询jndi名，通过强制转型得到Home接口，getInitialContext()函数返回一个经过初始化的上下文，用client的getHome()函数调用Home接口函数得到远程接口的引用，用远程接口的引用访问EJB

-ejbCreate function is used to initialize an EJB instance, demonstrates the Address EJB, create an EJB test client, get the name of the context, the query jndi name, by forcing the transition to the Home interface, the getInitialContext () function returns an initializedHome interface function is called context client s getHome () function to get the remote interface reference to access the EJB remote interface reference