title: How to make the value in dropdownlist not change after submit in JSP?
body: <p>Let's say i have a jsp page which contains a dropdownlist.
  when user select a item and click submit to submit the JSP page to itself, 
  after that , the JSP page will reload and item selected before will disselected.
  How can i make it not change even after reload the JSP page? </p>