Apache Tomcat：“上下文变量”
我是 Tomcat 的新手，因此有几个问题。我希望从任何代码中都可以获取某些可用于我的上下文的对象。我能够通过 DataSource 实现此目的，因为这是 Tomcat 指南中使用的示例。
我想添加 2 个额外的对象： 在构造函数中使用此数据源的对象 A 对象 B 在其构造函数中使用对象 A
我该怎么做？
I'm new to Tomcat and hence have a few question. I want to have certain objects available for my Context from any code. I was able to achieve this for a DataSource because that is the example used in the Tomcat guide.
I would like to add 2 additional objects:
Object A that uses this DataSource in the Constructor
Object B that uses Object A in it's constructor
How can I do this?
如果你对这篇内容有疑问，欢迎到本站社区发帖提问 参与讨论，获取更多帮助，或者扫码二维码加入 Web 技术交流群。
绑定邮箱获取回复消息
由于您还没有绑定你的真实邮箱，如果其他用户或者作者回复了您的评论，将不能在第一时间通知您！
发布评论
评论（2）
最简单的方法可能是使用 ContextListener 将对象 A 和 B 插入到上下文中。请参阅 http://download.oracle.com/javaee/1.4/tutorial/ doc/Servlets4.html 中的使用示例：在
contextInitialized方法中，您可以从上下文中获取数据源，创建对象 A 和 B，然后将它们存储回上下文中。What's probably the easiest thing to do is use a
ContextListenerthat inserts Objects A and B into the Context. See http://download.oracle.com/javaee/1.4/tutorial/doc/Servlets4.html for a usage example: in thecontextInitializedmethod you can grab the datasource out of the context, create objects A and B and then store them back into the context.根据 Tomcat 5.5 规范。发现于 http://tomcat.apache.org/tomcat-5.5-doc /config/globalresources.html 我发现
Context无法执行此类技巧，也不适合此类用途。您希望从“任何代码”中获得一些对象。如果这仅限于单个 Web 应用程序，那么您可以考虑 @Fermi 的答案，或者也许您应该启动 Spring
ApplicationContext。如果您还不熟悉 Spring 框架，这可能听起来有点太困难，但是如果您继续开发应用程序，我认为如果 Spring 上下文从一开始就已经存在，那么到了某个时候，事情就会变得更容易。 （如果您选择这种方式，如果您需要设置 Spring 的帮助，请在评论中告诉我。）According to the Tomcat 5.5 spec. found on http://tomcat.apache.org/tomcat-5.5-doc/config/globalresources.html I see that
Contextis not capable of doing such tricks and is not for such usages.You'd like to have some objects available from "any code". If this any is confined to a single web application, than you can consider @Fermi's answer or maybe you should launch a Spring
ApplicationContext. That might sound a bit too difficult if you're not familiar with Spring Framework yet, however if you keep developing your application I think there will be a certain point where things start to become easier if a Spring context already exists from the beginning. (Tell me in a comment if you need help with setting up Spring provided you choose that way.)