Parse request URL in JSTL
jstl, regex, spring, url-parsing
Solution
You can access the request URI in JSTL (actually: EL) as follows:
${pageContext.request.requestURI}
(which thus returns `HttpServletRequest#getRequestURI()`)
Then, to determine it, you'll have to play a bit round with JSTL functions taglib. It offers several string manipulation methods like `split()`, `indexOf()`, `substringAfter()`, etc. No, no one supports regex. Just parse it.
Kickoff example:
<c:set var="pathinfo" value="${fn:split(pageContext.request.requestURI, '/')}" />
<c:set var="id" value="${pathinfo[pathinfo.length - 1]}" />
And use it as `${id}`.
Problem
I want to display a specific message based on the URL request on a JSP. the request URL can be: ``` /app/cars/{id} ``` OR ``` /app/people/{id} ``` On my `messages.properties` I've got: ``` events.action.cars=My car {0} event events.action.people=My person {1} event ``` Finally, on my JSP page I want to have the following code: ``` <spring:message code="events.${element.cause}.${?????}" arguments="${element.param['0']},${element.param['1']}"/> ``` I need help figuring out which expression I could use to parse the request URL and obtain the word before the ID.