VariableResolver resolver = getVariableResolver();
resolver.addGlobalVariable("javax.servlet.ServletContext", JetWebContext.SERVLET_CONTEXT);
resolver.addGlobalVariable("javax.servlet.http.HttpSession", JetWebContext.SESSION);
resolver.addGlobalVariable("javax.servlet.http.HttpServletRequest", JetWebContext.REQUEST);
resolver.addGlobalVariable("javax.servlet.http.HttpServletResponse", JetWebContext.RESPONSE);
resolver.addGlobalVariable("java.util.Map<String,Object>", JetWebContext.SERVLET_CONTEXT_SCOPE);
resolver.addGlobalVariable("java.util.Map<String,Object>", JetWebContext.SESSION_SCOPE);
resolver.addGlobalVariable("java.util.Map<String,Object>", JetWebContext.REQUEST_SCOPE);
resolver.addGlobalVariable("java.util.Map<String,String>", JetWebContext.PARAMETER);
resolver.addGlobalVariable("java.util.Map<String,String[]>", JetWebContext.PARAMETER_VALUES);