JSTL doesn't output Object property values

Question

I am new to Java servlets and hence was working over it when this problem stepped in and I have searched a lot for getting the solution but no luck.

In Servlet

I have stored a List of Object in session and forwarded it to the JSP page.

List<PostBean> posts= PostDAO.getPosts(user.getId());
session.setAttribute("posts", posts);
request.getRequestDispatcher("dashboard.jsp").forward(request, response);

Here, getPosts() returns all the posts created by the user as List<PostBean>

In JSP Page

<% List<PostBean> posts = (List<PostBean>) session.getAttribute("posts");
   request.setAttribute("posts", posts);
%>

<section class="posts">
    <c:forEach items="${posts}" var="post">
       <h2><c:out value="${post.userId}"/></h2>
    </c:forEach>
</section>

I learnt in an answer on stackoverflow that the object list have to be stored in the request object as such and then used in the jstl, while I also tried using sessionScope.posts but still it didn't work.

PostBean

I have made two of its properties public just because calling the getter method on the object was being warned as Cannot resolve method 'getBody'. So to directly access them, I made them public but still not working.

package Beans;

public class PostBean {

   private int id;
   public String body; //made public 
   public int userId;  //made public
   private String link;
   private String date;

   public int getId() {
       return id;
   }

   public void setId(int id) {
       this.id = id;
   }

   public String getBody() {
       return body;
   }

   public void setBody(String body) {
       this.body = body;
   }

   public int getUserId() {
       return userId;
   }

   public void setUserId(int userId) {
       this.userId = userId;
   }

   public String getLink() {
       return link;
   }

   public void setLink(String link) {
       this.link = link;
   }

   public String getDate() {
      return date;
   }

   public void setDate(String date) {
       this.date = date;
   }

}

What's wrong in the code? Can someone please explain briefly about it?

Thanks in advance.