速度(VM)模板请求参数:获取GET变量

本文介绍了速度(VM)模板请求参数:获取GET变量的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述

如何访问VM模板中URI中传递的GET变量?

How do i access GET variables as passed in the URI in a VM template?

这仅在加载窗口小部件URL时有效:

This works only when loading the widget URL:

$request.get("parameters").get("fav").get(0)

我正在寻找一种适用于友好URL的简洁解决方案.

I'm looking for a neat solution that works with friendly URLs.

这是我的测试模板:

<br><br><br> #set($url = $request.attributes.CURRENT_URL) <h2>url: $url</h2> #set($favs = $url.split("fav=")) favs: $favs<br> favs.size(): $favs.size() <br> #if($favs.size() > 1) #set($fav1 = $favs.get(1).split("&").get(0)) fav1: $fav1<br> #else No fav! #end #if($favs.size() > 2) #set($fav2 = $favs.get(2).split("&").get(0)) fav2: $fav2<br> #end #set($favs2 = $httpUtil.getParameterMap($url, "fav")) favs2: $favs2 <hr> <h3>Fav?</h3> <form method="get"> <input type="checkbox" name="fav" value="dave"/> Dave<br> <input type="checkbox" name="fav" value="nate"/> Nate<br> <input type="checkbox" name="fav" value="taylor"/> Taylor<br> <input type="submit" value="Send"/> </form> <hr> <div style="font-size: 9px;">request: $request</div>

推荐答案

另一种选择是使用$ httpUtil，这是在Velocity模板中注入的Liferay实用程序类.这样，您可以执行以下操作:

Another option would be to use $httpUtil, a Liferay utility class that's injected in Velocity templates. This way you could do the following:

#set($url = $request.attributes.CURRENT_URL) #set($singleValue = $httpUtil.getParameter($url, "foo", false)) #set($multipleValues = $httpUtil.getParameterMap($httpUtil.getQueryString($url)).foo)