CODEWITHSUNDEEP
javajavascriptjspsessionsession-variables
Seeya K
Seeya K

Reputation: 1321

Passing session variable data from jsp to java

I have created session variables since I want to transfer data from one JSP to another. Each of my JSPs is a tab. I transfer data given from the user from one JSP to another using the request body. I have <form>..><button type = "submit"/> </form> in the last JSP from where I submit the data and use it in a Java class.

When I try to access the session data from all the JSP pages, it returns a null value for all the data.

How should I transfer all the session data from all the JSPs to a Java class? Please note that each JSP is a tab, and I submit data from the last JSP.

Code:

<% 
    String joindate = request.getParameter( "joindate" );
    session.setAttribute("joindate",joindate);
    String birthdate = request.getParameter( "birthdate" );
    session.setAttribute("birthdate",birthdate);
%>

Upvotes: 0

Views: 16062

Answers (1)

zz3599
zz3599

Reputation: 647

In general, just try to avoid scriptlets. You should definitely do what Makoto recommended: use a MVC pattern by having your JSPs submit their data to a servlet, which does the heavy duty lifting.

Whenever you have a form in a JSP, consider using

<form action="servletpattern?action=add_date" method="post">

Then in the servlet:

 HttpSession session = request.getSession();
 String action = request.getParameter("action");
 if(action.equals("add_date")){
     String joindate = request.getParameter( "joindate" );
     session.setAttribute("joindate",joindate);
     String birthdate = request.getParameter( "birthdate" );
     session.setAttribute("birthdate",birthdate);
 } else if(action.equals("someotheraction"){
     //do something else
 }

In the JSP you should again not use scriptlets but instead access the session variables through EL : 

join date: ${joindate}, birth date: ${birthdate}

Upvotes: 1

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