How to implement session variables
Hi,I have a servlet which gets parameter from a jsp page(x). it is stored in a variable in servlet as shown below. the servlet response is another jsp page(y). I should put the value of amp_num in the Jsp page (y).
How should i do it? I'm trying using session.getAttribute
SERVLET:
-------------------
HttpSession session = request.getSession(false);
String amp_number = request.getParameter("amp1").toString();
int amp_num = Integer.parseInt(amp_number);
session.setAttribute("xyz",lamp_num);
JSP Page(y):
---------------
<input type="text" name="xyz" value="<%session.getAttribute(xyz); %>" size="20">
I dont need to put in a textfield, its ok if i print it. Do I need to add any path like (@servlet) because how the jsp know from which servlet i'm calling the variable xyz. please help me.
Thanks,
View Answers
June 10, 2010 at 11:33 AM
Hi Friend,
Try the following code:
1)no.jsp:
<form name="form" method="post" action="../ServletExample" >
Enter no:<input type="text" name="amp1"><input type="submit" value="submit">
</form>
2)ServletExample.java:
import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;
public class ServletExample extends HttpServlet{
public void doPost(HttpServletRequest request,HttpServletResponse response)throws ServletException,IOException{
response.setContentType("text/html");
PrintWriter out=response.getWriter();
HttpSession session = request.getSession(false);
String amp_number = request.getParameter("amp1").toString();
int amp_num = Integer.parseInt(amp_number);
session.setAttribute("xyz",amp_num);
getServletConfig().getServletContext().getRequestDispatcher("/modified/action.jsp").forward(request, response);
}
}
3)action.jsp:
<%=session.getAttribute("xyz")%>
It will be helpful for you.
Thanks
Try the following code:
1)no.jsp:
<form name="form" method="post" action="../ServletExample" >
Enter no:<input type="text" name="amp1"><input type="submit" value="submit">
</form>
2)ServletExample.java:
import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;
public class ServletExample extends HttpServlet{
public void doPost(HttpServletRequest request,HttpServletResponse response)throws ServletException,IOException{
response.setContentType("text/html");
PrintWriter out=response.getWriter();
HttpSession session = request.getSession(false);
String amp_number = request.getParameter("amp1").toString();
int amp_num = Integer.parseInt(amp_number);
session.setAttribute("xyz",amp_num);
getServletConfig().getServletContext().getRequestDispatcher("/modified/action.jsp").forward(request, response);
}
}
3)action.jsp:
<%=session.getAttribute("xyz")%>
It will be helpful for you.
Thanks
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