The page managed to redirect to Mypage.jsp but the URL in the browser is still the original .do page. Now, Mypage.jsp, I have some a href links, which cannot be clicked because it throws an exception. The a href links are valid.
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You can accomplish this by including the "redirect" attribute:
<forward name="Mypage" path="/jsp-mobile/sys/Mypage.jsp" redirect="true"/>
This is usually a Bad Idea as the user will have the JSP page in their history and can then load it without going through the corresponding action first, which is probably not what you want them to do.