Some Java servlets are not exposed as JSP pages; instead they are Java programs. You can incorporate JSP servlets in your ColdFusion application. For example, your enterprise might have an existing servlet that performs some business logic. To use a servlet, the ColdFusion page specifies the servlet by using the ColdFusion GetPageContext function.
When you access the servlet with the GetPageContext function, the ColdFusion page shares the Request, Application, and Session scopes with the servlet, so you can use these scopes for shared data.
ColdFusion pages can also access servlets by using the cfhttp tag, use the servlet URL in a form tag, or access an SHTML page that uses a servlet tag.
Note: The cfservlet tag, which provides access to servlets on JRun servers, is deprecated for ColdFusion MX.