Pass a parameter from one jsp to another using form.action

Question

I have an ID that I need in the next jsp once the user click a button. I am trying to do the following:

FirstJSP.jsp:

function getSecond() { var frm = document.getElementById("frm"); frm.action = "**second.jsp?id=myId;"** frm.submit(); }

... form id="frm" ..... input type="button" value="Next" onclick="getSecond()"/

......

This code takes me to my second page, but if I tried to access the id, it gives me an error since the id is null.

I access the id in the second page by:

final Long passedId = Long.parseLong(request.getParameter("id"));

I think I am not passing the parameter correctly, but I don't know how to do it. Any ideas? Thank you so much!

Answer 1

Well if the code fragment you give above is literally what you are writing, then you are setting id to the text "myId". When you try to parse this as a Long it throws an exception because the string is not a valid number -- it doesn't contain any digits.

I presume what you want to say is something more like

frm.action="second.jsp?id="+myId

Assuming that myId has been defined somewhere and is a number.

Answer 2

Ok... I found my mistake... I wans't using any method in my form, so I updated it to form name="frm" method="post"

Also, like I mentioned in my last note, the action line is now frm.action="second.jsp?id="+<%=myId%>;

It works now!