Please decode this error..

Question

i've a page that displays records from the database..i'm using mvc model...
the records are fetched by a model and returned to a servlet and that ResultSet is added to session as an attribute.. in the jsp file i try to retrieve that ResulSet :
ResultSet rs = (ResultSet)session.getAttribute("e_rs");
next i display those records
while(rs.next()) {
i get an exception in while(rs.next()) the exception information is below....
javax.servlet.ServletException: Operation not allowed after ResultSet closed
     org.apache.jasper.runtime.PageContextImpl.doHandlePageException(PageContextImpl.java:843)
     org.apache.jasper.runtime.PageContextImpl.handlePageException(PageContextImpl.java:776)
     org.apache.jsp.transactions_jsp._jspService(transactions_jsp.java:167)
     org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:97)
     javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
     org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:334)
     org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:314)
     org.apache.jasper.servlet.JspServlet.service(JspServlet.java:264)
     javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
     com.example.web.order_history.doGet(order_history.java:29)
     javax.servlet.http.HttpServlet.service(HttpServlet.java:689)
     javax.servlet.http.HttpServlet.service(HttpServlet.java:802)

Answer 1

The error message is :
Operation not allowed after ResultSet closed
which means that the code in the JSP page is trying to access a ResultSet object which has already been closed.
Instead of accessing the ResultSet in the JSP page I strongly encourage you to store the ResultSet in an ArrayList of a particular JavaBean object and then access that ArrayList in the JSP page.
You will be populating the ArrayList of JavaBean objects, in the same loop that you use to iterate over the ResultSet inside the JDBC layer while accessing individual records from the result set.
Make use of jsp:useBean tag to access the ArrayList in the JSP, and then use JSTL c:forEach tag to iterate over the resultset. JSTL 1.1 is the new way of writing JSP compared to scriptlets which make the code messy and complicated in JSPs.
Especially if you are using MVC which strongly discourages database or business logic directly in JSP pages.