JSP, kalla på servlet från en hyperlänk

<section id="posts">
	<h2>Posts:</h2>
	<ul>
		<c:forEach var="post" items="${posts}">
			<div style="background-color:#98D9EA;">
				<form action="<%= contextPath %>/Start" method="POST" id="posttitle">
				     <a href="#" onclick="document.getElementById('posttitle').submit()"><font size="5"><b><c:out value="${post.title}"/></b></font><br></a>
				</form>
				<c:out value="${post.text}"/><br>
				<font size="2"><i>Posted by <c:out value="${post.author}"/>.</i></font><br>
			</div>
			<br>
		</c:forEach>
	</ul>
</section>

protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		
		request.setCharacterEncoding("utf-8");
	
		String action = request.getParameter("action"); //action är alltid null

<section id="posts">
	<form action="<%= contextPath %>/Start" method="POST">
		<h2>Posts:</h2>
		<ul>
			<c:forEach var="post" items="${posts}">
				<div style="background-color:#98D9EA;">
					<font size="5"><b><c:out value="${post.title}"/></b></font><br>
					<c:out value="${post.text}"/><br>
					<font size="2"><i>Posted by <c:out value="${post.author}"/>.</i></font>
					<p><input value="View Comments" type="submit"><input type="hidden" name="action" value="viewPost"></p>
				</div>
				<br>
			</c:forEach>
		</ul>
	</form>
</section>

	protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException
	{	
		String action = request.getParameter("action");
		
		if(action.equals("addPost"))
		{
			...		
		}
		else if(action.equals("viewPost"))
		{
			Object obj = request.getAttribute("post");
			
			System.out.println(obj == null);            //Denna blir alltid true
			System.out.println(obj instanceof Post); //Denna blir alltid false.
		}