如何在struts2的应用范围内设置一个值? [英] How to set a value in application scope in struts2?
问题描述
我有一个列表,我的应用程序的所有用户都可以访问它.我目前正在将它添加到特定用户的会话中.但我希望它在应用程序范围内而不是会话范围内.请帮助提供参考/链接任何例子
I have a list that is accessible to all user of my application.I am currently adding it to session of a particular user.But i want it to be in application scope rather than session scope.Please help also provide reference/link to any example
推荐答案
我不确定您想如何使用该列表:您想将该列表显示到屏幕上,或者您只需要它作为配置.要显示它,您可以:
I am not sure how you want to use the list: you want to display that list to the screen or you just need it as configuration. To display it you could:
- 在您的 Action 中
静态
创建您的列表,然后在 JSP 中显示它 - 您可以从数据库中
动态
获取列表,然后将其显示在 JSP 中
- create your list
statically
in your Action, then display it in the JSP - you could take the list
dynamically
from a database, then display it in the JSP
将其用作配置:一些数据可以在初始化时在应用程序级别可用,但这些是配置参数.更多信息在这里:
To use it as configuration: some data can be made available at application level at initialization, but those are configuration params. More info here:
使用 ServletContext
是您可以动态设置参数到 servlet 从您的代码的唯一方法:servletContext.setAttribute()
.更多信息在这里:
Using the ServletContext
is the only way you can set parameters dynamically to the servlet from your code: servletContext.setAttribute()
. More info here:
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