Actually it could be implemented with wrapper


/**
*
* Get generated page body as String.
* Using :
*
*
* JspResponseWrapper my = new JspResponseWrapper(response) ;
* request.getRequestDispatcher( request.getContextPath() + "/index.jsp" ).include(request, my);
* String body = my.getBody() ;
*
*
*/



public class JspResponseWrapper extends javax.servlet.http.HttpServletResponseWrapper {

StringWriter sw ;

public JspResponseWrapper(javax.servlet.http.HttpServletResponse response) {
super(response) ;
sw = new StringWriter() ;
}

public PrintWriter getWriter() throws IOException {
PrintWriter pw = new PrintWriter(sw) ;
return pw ;
}

public String getBody() {
return sw.toString() ;
}

}

Code example :


JspResponseWrapper my = new JspResponseWrapper(response) ;
request.getRequestDispatcher( request.getContextPath() + "/index.jsp" ).include(request, my);
String body = my.getBody() ;

// and send mail now