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Editorial Team
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Asked: 2026-05-23T12:23:10+00:00

I’m wondering is possible to integrate custom servlet logic with .jsp template view. For

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I’m wondering is possible to integrate custom servlet logic with .jsp template view. For example I have the following servlet:

public class MyServlet extends HttpServlet {

  protected void doPost(HttpServletRequest request, HttpServletResponse response)
        throws ServletException, IOException {
      String name = "Mark";        
  }
}

and I want to place name variable inside jsp file(new.jsp) like:

<%@page contentType="text/html" pageEncoding="UTF-8"%>
<html>
    <head>
        <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
        <title>New</title>
    </head>
    <body>
         <%= name %>

    </body>
</html>

My web.xml:

<servlet>
    <servlet-name>MyServlet</servlet-name>
    <jsp-file>/new.jsp</jsp-file>
</servlet>
<servlet-mapping>
    <servlet-name>MyServlet</servlet-name>
    <url-pattern>/new</url-pattern>
</servlet-mapping>

I don’t want to put name in request.

Any help?

UPDATE

Great thanks, but I’m still having a trouble.
Firstly, I updated my servlet:

public class MyServlet extends HttpServlet {

  protected void doPost(HttpServletRequest request, HttpServletResponse response)
        throws ServletException, IOException {
      String name = "Mark";
      request.setAttribute("name", name);
      request.getRequestDispatcher("/WEB-INF/new.jsp").forward(request, response);       
  }

  protected void doPost(HttpServletRequest request, HttpServletResponse response)
        throws ServletException, IOException {
      String name = "Mark";
      request.setAttribute("name", name);
      request.getRequestDispatcher("/WEB-INF/new.jsp").forward(request, response);       
  }
}

I also changed my view:

<%@page contentType="text/html" pageEncoding="UTF-8"%>
<html>
    <head>
        <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
        <title>New</title>
    </head>
    <body>
         ${name}

    </body>
</html>

But when I use ${name} there’s nothing displayed. I thought that I should import any jstl, but unfortunately if I use <%= request.getAttribute("name") %> I’m getting null.

UPDATE 2
Finally solved! It was my fault, I forgot set

<servlet>
   <servlet-name>MyServlet</servlet-name>
   <servlet-class>com.example.MyServlet</servlet-class>
</servlet>
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1 Answer

  1. Editorial Team

    You need to implement the doGet() method instead. A normal HTTP request (clicking a link, a bookmark or entering the URL straight in browser address bar) defaults to GET method.

    In order to make objects available in JSP in a preprocessing servlet, you need to set it as an attribute in request, session or application scope. Finally you need to forward the request/response to the JSP so that it can be displayed.

    protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
    String name = "Mark";
    request.setAttribute("name", name);
    request.getRequestDispatcher("/WEB-INF/new.jsp").forward(request, response);
}

    If you fix the servlet mapping as follows

    <servlet>
    <servlet-name>MyServlet</servlet-name>
    <servlet-class>com.example.MyServlet</servlet-class>
</servlet>
<servlet-mapping>
    <servlet-name>MyServlet</servlet-name>
    <url-pattern>/new</url-pattern>
</servlet-mapping>

    then you can just invoke the servlet by http://localhost:8080/contextname/new. In the forwarded JSP you can access the name just by EL

    ${name}

    Note that the JSP is placed in /WEB-INF folder in order to avoid direct access without the preprocessing servlet being called by entering the JSP URL in browser address bar instead.

    See also:

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