Request Parameters
Use:
${param.param_name}
To access the values of request parameters passed in the URL query string. Given:
http://www.mysite.org/my_folder/my_page.html?foo=bar,
You can access the value of the query string parameter, foo, in the page with:
The URL parameter foo has a value of: ${param.foo}
Or:
<t:set id="myFoo" value="param.foo" /> <t:if test="myFoo == 'bar'"> My foo equals bar! </t:if>