HttpSession Servlet don't work correctly from a servlet to a servlet

Question

Good afternoon, I'm trying to recover an instantiated object from a servlet in the HttpSession object.

When I try to recover from the JSP, I get the object smoothly. However when I try to retrieve this data from another Servlet, not me gets the object, It returns me NULL directly, although the session ID is the same.

Here's the code where I instantiate the object to pass:

request.getSession(true);
request.getSession().setAttribute("object1", object1);

This is the code that attempt to retrieve the object.

req.getSession().getAttribute("object1");

Can you think of anything?

Thanks and regards.

Answer 1

In jspkeep the data in session like this way

session.setAttribute("object1", object1); and retrieve in servlet like this way

HttpSession session=request.getSession();
session.getAttribute("object1");

Answer 2

Try this

Listing 3: Storing an Object

public class logonServlet extends HttpServlet{

public void service(HttpServletRequest _req, HttpServletRe-

sponse _res) throws ServletException{

ServletContext thisContext = getServletContext();

//-- Assume some method creates a new connection class

Connection newConnection = createConnection();

thisContext.setAttribute( "database.connection", newConnection );

//-- Return some output to the client

} }

Listing 4: retrieving an Object

public class logoffServlet extends HttpServlet{

public void service(HttpServletRequest _req, HttpServletRe- sponse _res) throws ServletException{

ServletContext thisContext = getServletContext();

//-- Assume some method creates a new connection class

Connection newConnection = thisContext.getAttribute( "database.connection");

if ( newConnection == null )

//- Database has not been opened yet

//-- Return some output to the client

} }

Source: http://www2.sys-con.com/itsg/virtualcd/java/archives/0505/williamson2/index.html