java 在 FreeMarker 上获取 URL 的 queryString
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get queryString of a URL on FreeMarker
提问by franticfrantic
learning FTL here.
在这里学习 FTL。
I'm trying to get add a query string on my FTL page, like http://localhost/search, i'd like to add a query string on the URL, say http://localhost/search?bingso that user could switch with the default setting when there is no query string.
我正在尝试在我的 FTL 页面上添加一个查询字符串，例如http://localhost/search，我想在 URL 上添加一个查询字符串，http://localhost/search?bing这样用户可以在没有查询字符串时使用默认设置进行切换。
However, I have no luck on grabbing the queryString from the URL. I'm also trying to avoid using a JavaScript solution on this.
但是，我没有运气从 URL 中获取 queryString。我也试图避免在这方面使用 JavaScript 解决方案。
here's my code:
这是我的代码：
<#if RequestParameters.bing?exists >
<#assign useServer = "http://www.bing.com">
<#else>
<#assign useServer = "http://www.google.com">
</#if>
<h1>${useServer}</h1>
typing in the queryString into the url still returns http://www.google.comon the h1.
打字查询字符串到URL仍返回http://www.google.com上h1。
回答by TheWhiteRabbit
For query string ?param1=abc¶m2=123, you can retrive params like below:
对于查询字符串?param1=abc¶m2=123，您可以检索如下参数：
${RequestParameters.param1} & ${RequestParameters.param2}
${RequestParameters.param1} & ${RequestParameters.param2}
And also try <#if RequestParameters.bing??>
也试试 <#if RequestParameters.bing??>
parameters are something that followed by < protocol >://< host >:< port >?< param1 >&< param2 >&..
参数后面跟着<协议>：//<主机>：<端口> ？<参数1>&<参数2>&..
for example in https://www.google.co.in/search?q=StackOverflowURL param name is qand value is 'StackOverflow'
例如在https://www.google.co.in/search?q=StackOverflowURL 参数名称是q值是“StackOverflow”
回答by franticfrantic
I figured out to use request.getParameter("param")
我想出使用 request.getParameter("param")
<#if (request.getParameter("param")?has_content && request.getParameter("param")?lower_case?matches("true"))>
<#assign useServer = "http://bing.com">
<#else>
<#assign useServer = "http://google.com">
Worked like a charm.
像魅力一样工作。
回答by OulinaArt
I tried to check request parameters with first post's code:
我试图用第一篇文章的代码检查请求参数：
<#if RequestParameters.bing??>
BUT nothing happened.
Then I checked <#if RequestParameters.param1??>then I got result.
但什么也没发生。然后我检查<#if RequestParameters.param1??>然后我得到了结果。
I hope it helps someone.
我希望它可以帮助某人。
