Re: Running java on the server side?

lipska the kat <>
Mon, 12 May 2014 09:35:26 +0100
On 10/05/14 19:48, wrote:

I am looking into eliminating Java applets from a hobby website of mine.

The web currently has 2 applets that accept some configuration data and then do some calculations and display the results.

I am wondering if I can create Html accepts the configuration data, sends it to the server where a java application can run to crunch the results and create an html page. Then, the html page can be displayed.

That way I can use the existing number crunching code in Java and have the interface all in Html and hopefully get rid of all the security issues of trying to run a program in the client.

I have pretty limited web development skills. Heck, I thought applet development would be most of the skill I would need for this hobby!

Also, and better ideas for making the web site easier to use? I don't know that this is the best solution.

The web site is The applets are the poologic calculator and the roi calculator.

Here's some outline code, there is no exception handling and there
are a million other ways of doing it but this covers the basics.

<form action="/pathToSomeServlet" method="post">
    <input type="text" name="field1">
    //more input fields

protected void doPost(HttpServletRequest request, ...){

     HttpSession session = request.getSession();
     String field1 = request.getParameter("field1");
     //get more parameters

     List<Foo> list = processParams(field1, field2, ...);
     List<Foo> list = processParams(HttpServletRequest request);

     session.setAttribute("results", list);
     String forwardTarget = "/someJsp.jsp");
     RequestDispatcher rd = null;
     rd = getServletContext().getRequestDispatcher(forwardTarget);
     rd.forward(request, response);


List<Foo> results = (List<Foo>)session.getAttribute("results");

for(Foo f: results){
    //render f


There are all sorts of frameworks out there, there are all sorts of
custom tags out there and there are a million naysayers and doom mongers
just waiting to pull any solution you come up with to bits.

My philosophy?

Keep It Simple
If it feels good ... do it


lipska the kat - treacherous feline.
Proudly nominated for IPOTY 2014 - LIGAF
GNU/Linux user #560883 -

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