It's kind of a pain but the best way I know is to do it this way. In the form itself, have a hidden variable... we'll call it "uniqueid". This needs to be dynamically generated every time the form is called from the server, and the value must be a unique ID... I'm lazy so I use System.currentTimeMillis().
<input type="hidden" name="uniqueid" value="<%= System.currentTimeMillis() %>"> On the page that the form submits to, you'll keep a set of used uniqueid's in a hashtable in the session. First see if the uniqueid that was just passed does exist in the hashtable; if so, then you know that this exact form has already been submitted and processed, and you can act accordingly. If not, then process the form and store the uniqueid in the hashtable. Make sense? -jmc -----Original Message----- From: Vince Chau [mailto:[EMAIL PROTECTED]] Sent: Tuesday, November 13, 2001 11:50 AM To: [EMAIL PROTECTED] Subject: How to prevent data from being submited twice in a JSP page? Hi all As the subject suggests what is the easiest way to implement this? Everytime I reload my page, my data gets resubmitted, how do I prevent this? Here is my sample code <% String myComments = request.getParameter("COMMENTS"); %> <% bean0.setConnection(); %> <% if (myComments != null) { bean0.insertEntry(myComments); } %> <%=bean0.getShow() %> Is there some sort of flag I need to tell my JSP page to be aware off? So it knows not to resubmit the data, or is there a way of reseting parameters? Thans in advance Vince =========================================================================== To unsubscribe: mailto [EMAIL PROTECTED] with body: "signoff JSP-INTEREST". For digest: mailto [EMAIL PROTECTED] with body: "set JSP-INTEREST DIGEST". Some relevant FAQs on JSP/Servlets can be found at: http://archives.java.sun.com/jsp-interest.html http://java.sun.com/products/jsp/faq.html http://www.esperanto.org.nz/jsp/jspfaq.jsp http://www.jguru.com/faq/index.jsp http://www.jspinsider.com =========================================================================== To unsubscribe: mailto [EMAIL PROTECTED] with body: "signoff JSP-INTEREST". For digest: mailto [EMAIL PROTECTED] with body: "set JSP-INTEREST DIGEST". Some relevant FAQs on JSP/Servlets can be found at: http://archives.java.sun.com/jsp-interest.html http://java.sun.com/products/jsp/faq.html http://www.esperanto.org.nz/jsp/jspfaq.jsp http://www.jguru.com/faq/index.jsp http://www.jspinsider.com
