How to write JSP scriptlet code using the OpenCms API

The functionality of the OpenCms JSP Taglib can also be accessed by using a single Java Bean: org.opencms.jsp.CmsJspActionElement. To develop JSP pages using the OpenCms API, programmers are not fixed to a certain approach. Both the OpenCms JSP taglib and the CmsJspActionElement offer the same options. In fact, both ways execute the same internal code! Experienced Java programmers can find an equivalent method in the Bean CmsJspActionElement for each tag of the OpenCms Taglib. For a detailed description of the OpenCms JSP Taglib, please refer to the OpenCms JSP Taglib documentation which is available as a separate module.

Put this code snippet in the head of your JSP page to initialize the CmsJspActionElement as a Java Bean:

<jsp:useBean id="cms" class="org.opencms.jsp.CmsJspActionElement">
<% cms.init(pageContext, request, response); %>
</jsp:useBean>

Because the CmsJspActionElement requires the current pageContext, request and response instances, you do have to invoke the init() method! Alternatively, an instance of CmsJspActionElement can also be created by passing these values as parameters to the CmsJspActionsElement's second constructor like this:

<% org.opencms.jsp.CmsJspActionElement cms = new CmsJspActionElement(pageContext, request, response); %>

The next pages describe the usage of the different methods provided with the CmsJspActionElement. The Javadocs for the CmsJspActionElement are included, too.

Documentation for the user() method

This method provides access to read the properties of the current user.

Test for the user() method

A test displaying various properties of the currently logged in user.

Documentation for the property() method

This method provides access to read the properties of the current file.

Test for the property() method

A test reading various file properties from different files in the OpenCms VFS.

Documentation for the link() method

This method acts as a wrapper to build a valid OpenCms URL for a given resource.

Test for the link() method

This test uses the link() method to get some link substitutions for different files. This method is required in case you want to use the static export.

Documentation for the label() method

This method provides access to read the localized strings from the OpenCms workplace Java resource bundles.

Test for the label() method

This method can read out values from the OpenCms Workplace Java resource bundles. This can be used in case you want to build Workplace extensions and intend to make them language independent.

Documentation for the img() method

This method includes image scaleing scriptlets.

Test for the img() method

This test uses the link() method to get some link substitutions for different files. This method is required in case you want to use the static export.

Documentation for the editable() method

This method includes direct edit scriptlets.

Documentation for the include() method

This method includes other JSP elements dynamically at runtime.

Test for the include() method

This very important method allows you to include sub-elements on a page. These sub-elements can be cached, please see the FlexCache description for more details.

Test for the include() method with parameters

This test shows how to pass parameters to included JSP sub-elements.

Documentation for the template() method

This method checks if a template part should be used or not.

Test for the template() method

Example JSP page showing how to include parts from another JSP page.

Documentation for the info() method

This method prints various runtime information of your system.

Test for the info() method

A test to print all runtime information available by the info() method.

Documentation for the getNavigation() method

This method returns an initialized CmsJspNavBuilder instance to create a navigation.

Test for the getNavigation() method

A test building a navigation of the current folder.