GSP are not maintained as a standalone module. But it has been forked and reintegrated in Grails.

GSP

means GroovyServer Pages, which is similar to JSP (JavaServer Pages)

.


GSP Module Project has started originally by Troy Heninger.

The original sources of GSP module 1.1 can be found at Groovy's SVN repository.

There is also a new GSP project page: https://gsp.dev.java.net/

Sample GSP: AttributeTest.gsp

<%
    if (session.counter == null)
        session.counter = 1
    else
        session.counter++

    session.setAttribute("id", "tmpID")
    session.setAttribute("uid", "userID")

    request.x = 123
    application.x = 500

    if (application.counter == null)
        application.counter = 1
    else
        application.counter++

%>

application.counter = ${application.counter} <br>
session.counter = ${session.counter} <br>
session.id = ${session.id} <br>
session.uid = ${session.uid} <br>
session.getAttribute('id') = ${session.getAttribute('id')} <br>
request.x = ${request.x} <br>
(application.x == null ?) = ${application.x == null} <br>
application.x = ${application.x} <br>

web.xml

<servlet>
    <servlet-name>GSP</servlet-name>
    <servlet-class>groovy.modules.pages.GroovyPages</servlet-class>
    <init-param>
         <param-name>encoding</param-name>
         <param-value>ISO-8859-1</param-value>
    </init-param>
    <init-param>
         <param-name>debug</param-name>
         <param-value>0</param-value>
    </init-param>
</servlet>

<servlet-mapping>
    <servlet-name>GSP</servlet-name>
    <url-pattern>*.gsp</url-pattern>
</servlet-mapping>
</servlet>