How to transfer parameters in jsp files

Question

what i want is :
there is a jsp file named errorMsg.jsp, and in the file a variable msg which type
is String is used, and the value of msg will be display on web browser.
now, i want transfer a string to the errorMsg.jsp in another jsp file named try.jsp.
that mean i can decide which string be transfered dynamically, and transfer it to
errorMsg.jsp to show on the user's browser.
i want not to use the url something like this .../errorMsg.jsp?msg=hello.
any other method is there for using.
thx.

Answer 1

If the page involves form, another alternative is to use hidden fields for that.
<form name="errorMsg.jsp" method="POST">
<input type="hidden" name="message" value="hello">
... other fields here....
</form>
=> and in errorMsg.jsp retrieve the value using
String msg = request.getParameter("message");