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<title>csdn_企业JavaBeansTM技术介绍（5）</title>
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<td WIDTH="50%" bordercolor="#FFFFFF" CLASS="t1" bgcolor="#F0F0F0" align="center" nowrap>企业JavaBeansTM技术介绍（5） </td>
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客户做的第一件事是使用JNDI为所需要的Bean定位EJBHome。在本例子中, EJBHome对象可能以下列形式出现: <br>
<br>
public interface CartHome extends javax.ejb.EJBHome{<br>
Cart create(String customerName , String account) <br>
throws RemoteException, BadAccountException;<br>
}<br>
<br>
<br>
CartHome接口包含一个create()方法, 当客户请求一个新的Bean的时候该方法将被调用。请注意, 这个方法是在EJBObject中实现的并将在被调用时调用Bean类中的ejbCreate()方法。
<br>
<br>
ShoppingCart类的EJBHome对象可使用下列代码来定位: <br>
<br>
Context initialContext = new InitialContext();<br>
CartHome cartHome = (CartHome) initialContext.lookup<br>
("application/mall/shopping-carts");<br>
<br>
<br>
在本例中, 调用InitialContext()以得到JNDI命名层次的根；lookup()方法被用来得到CartHome。 在此种情况下, "applications/mall/shopping.carts"是JNDI到达你感兴趣的CartHome的路径。此时,
cartHome持有了ShoppingCartEJB的EJBHome对象的引用。然而, 请注意客户的JNDI的命名空间可能被设置为包括分布于网络上的多种机器上的EJB容器;
EJB容器的实际位置一般来说对客户是透明的。</td>
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