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Objective The goal of this tutorial is to prevent multiple submits 1.Update existing JSP file –view.jsp 2.Add page flow path –struts-config.xml 3.Update Action to handle redirect –AddBookAction.java

view.jsp Add this hidden form field redirect" type="hidden" value=" ">

struts-config.xml Lets add /ext/library/success so that we have a landing path

AddBookAction.java We are going to modify our java to use a redirect instead of a forward A forward still submits to the page that it lands on. But a redirect will no longer retain the submit state on the landing page Comment out the forward line //setForward(req, "portlet.ext.library.success"); Add this line to the code res.sendRedirect(req.getParameter("redirect"));

AddBookAction.java What is “redirect”? “redirect” is the name of the hidden field we added to view.jsp res is the response object sendRedirect is an portlet method that grabs a request value from either the querystring or form submit. It than redirects to the redirect value Make sure that your redirect value is a valid URL

Deploy the Files to Tomcat Deploy files to Tomcat once you are finished Open up a cmd prompt –Click “Start”, “Run” and then type “cmd” Navigate to your ext directory and then type “ant deploy” …\ext>ant deploy

Final Steps 1.Restart Tomcat 2.Open up a new browser and type LOGIN: PASSWORD: test

Review Key Concepts Add a hidden “redirect” form field to view.jsp “redirect” is the URL of the view.jsp Make sure that the path exist in struts-config.xml In your java, replace your forward path with a sendRedirect path.

Revision History Jerry Niu9/13/2006-9/14/2006 Slide create and updates