EJB Tier的意思|示意

This can lead to an insecure system, as hackers may be able to write code to call the EJB directly and bypass the Web tier.

这可能导致系统不安全，因为黑客可以编写代码来直接调用EJB，而得以绕过web层。

Implementing an EJB tier, though not required, lays the foundation for creating a highly scalable, distributed application architecture.

虽然没有要求实现ejb层，但这样做可以为建立高度可伸缩的分布式应用程序架构提供基础。

In this case you could instantiate the Spring container in a similar fashion as described above for the EJB tier.

在此情况下，您可以按照上面针对ejb层描述的类似方式实例化spring容器。

We do not like to pass the uid and PWD as parameters or store in some objects to pass from the Web tier to the EJB tier.

我们不想将uid和pwd作为参数传递，或者存储到一些从We b层到ejb层传递的对象中。

Or, if using these containers, developers now have the option of using a unified and consistent session API in any tier, instead of servlet or EJB-specific mechanisms.

或者，如果正在使用这些容器，开发者现在也可以选择使用在任何层统一一致的会话api，取代Servlet或EJB机制。

The enterprise tier, through technologies such as EJB and JPA, has strong support for transactional resources. The web tier is focused on presentation.

Enterprise层（借助于EJB和JPA等技术）对事务性资源提供了强大的支持，而Web层则关注于展示。