Form Submit success response using servlets

Question

HI All ,

I am submitting a form for file upload to a servlet but i dont know how to send a success event back to java script , actually i need to call a function after the servlet is successfully executed . Please help me to find out possible approach .

Answer 1

Just let the Servlet set a variable in request scope and let JSP generate the JavaScript code accordingly.

Servlet:

boolean success = true; // or false.
request.setAttribute("success", success);
request.getRequestDispatcher("/WEB-INF/result.jsp").forward(request, response);

JSP:

<script>var success = ${success};</script>

It will end up in webbrowser like

<script>var success = true;</script>

You know how to continue with this JavaScript, right? if (success) {} else {} and so on :)

See also:

• Communication between Java/JSP/JSF and JavaScript - explains the concepts in depth.