public   void  render(PageContext pageContext)
     throws  JspException {
         try  {
            pageContext.include(content);
        }  catch (Exception ex) { // IOException or ServletException
             throw   new  JspException(ex.getMessage());
        }
    }

 package  tagstests.tags;

 import  javax.servlet.jsp.tagext.*;
 import  javax.servlet.jsp.JspWriter;
 import  javax.servlet.jsp.JspException;

//import tagstests.beans.TestBean;


 public   class  OuterTag  extends  TagSupport {
    
     public   int  doStartTag() throws  JspException{
        System.out.println("OuterTag: doStartTag in");
        
         try {
            pageContext.include("/template.jsp");
        } catch (Exception e){
            e.printStackTrace();
             throw   new  JspException(e);
        }
        
        System.out.println("OuterTag: doStartTag out");
         return   this .EVAL_BODY_INCLUDE;
    }

}

<%@page contentType="text/html"%>
<%@page pageEncoding="UTF-8"%>
<%@page errorPage="errorPage.jsp"%>


<%@taglib  uri="/WEB-INF/tlds/tagstest.tld" prefix="test" %>

<test:OuterTag/>