request.getParameter in JSP
I haven't got too much experience with JSP but I thought that String action = request.getParameter("action"); was a fairly standard way of getting information.
If that is right, then why does IDEA hightlight getParameter in red and say cannot resolve method?
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Your code is correct, and would work as expected.
Do you have the servlet API configured as a library?
For example, if you're using maven, you'd need a dependency like:
-----------------------------
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>servlet-api</artifactId>
<version>2.4</version>
<scope>provided</scope>
</dependency>
-----------------------------
Hope that helps,
-tt
You can try like this.
<%!String action="";%>
<%action=(String)request.getParameter("action");%>