问题描述
在jsp页面中，我们可以使用以下命令获取服务器名称和服务器端口 request.getServerName()和request.getServerPort().
In jsp page we can get Server Name and Server Port by using request.getServerName() and request.getServerPort().`
由于我们无法从Liferay速度模板中获取HttpServletRequest，是否还有其他方法可以获得服务器名称和服务器端口?请回答一个小的代码段.
As we can't get HttpServletRequest from Liferay velocity template, Is there any other way toget both Server Name and Server Port ? Please answer with a small code snippet..
推荐答案
在Liferay资源中，您可以找到com.liferay.portal.velocity.VelocityVariablesImpl.
In your Liferay sources you can find com.liferay.portal.velocity.VelocityVariablesImpl.
此类位于portal-impl/src/com/liferay/portal/velocity/VelocityVariablesImpl.java下.
如果您检查速度上下文的所有条目(如velocityContext.put(String key, Object value)之类的行)，并且特别检查insertVariables方法中的那些条目，您会发现这会将您的httpServletRequest公开为"request".
If you check all entries to velocity context (lines like velocityContext.put(String key, Object value)) and specially the ones in the insertVariables method, you'll see that this exposes you httpServletRequest under the name "request".
因此，您可以在模板中使用键$request来访问请求对象，就像访问其他任何速度上下文对象一样.
Therefore, in your template you access your request object as any other velocity context object with the key $request.
然后，该对象将可用于其所有方法和属性(如果已公开).
This object will, then, be usable with all it's methods and properties (if public).
所以就做
$request.getServerName()
和
$request.getServerPort()
此外，如果要将速度变量设置为其中之一，请执行以下操作
Furthermore, if you want to set a velocity variable to one of those, just do as follows
#set ($my_amazing_variable = $request.getServerPort())
然后您就可以将$my_amazing_variable用作任何常规的速度垃圾.
You'll then be able to use $my_amazing_variable as any regular velocity litteral.
希望这会有所帮助.
NOTA BENE！
NOTA BENE !
请注意，您无权访问Liferay中所有类型的速度模板下的完全相同的变量和宏集.有不同的集合
Note that you do not have access to the exact same set of variables and macros under all types of velocity templates in Liferay.There are different sets for
- 主题模板
- 布局模板
- 网络内容模板
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