It’s been a long time before I post this solution.Actually I got a lot of problems and solutions but I didn’t have time to post it in my blog.So unlucky!
But right now I just steal some time to update and post this entry right after I got the solution. It’s been three days I faced this problem. It’s challenge my ability as programmer because as normal programmer, we will feel strong if our code works, is not, I feel that I am not good programmer at all,I should never be born as a programmer.
Problem: My servlet is keep repeating implement some code once you submit form from jsp page.I think it should not repeat if we don’t want to.
Example
public class PlacementServlet extends HttpServlet { protected void processRequest(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { try{ String mode=request.getParameter("mode"); System.out.println("MODE ------------------------------>"+mode); if(mode.equals("i can change my life ")){ //do something for example insert into databases } else { System.out.println(“Bye- bye”) } //more codes
<script> function doSubmit(){ var frm=document.placement frm.mode.value="i can change my life"; frm.action = "PlacementServlet"; frm.submit();} </script> <form name="placement"> <input name="btnsave" type="submit" class="button" id="btnsave" value="SAVE" onclick="javascript:doSubmit()"> </form>
So when I clicked SAVE button, the output in my NetBeans produce :
MODE ------------------------------> i can change my life
MODE ------------------------------> i can change my life
Which if I do code that inserting to database; it will insert two times and prompt error violent to primary key. I already get sick with the problem and modify almost entire coding until I got to see
<input name="btnsave" type="submit" class="button" id="btnsave" value="SAVE" onclick="javascript:doSubmit()">
So case is closed, right know I need to rewrite back the code that I modified due to my stupidiness.
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