Pass variables from servlet to jsp

Question

How can I pass variable from servlet to jsp  setAttribute and getAttribute didn t work for me  -

User · Answer

Use      request setAttribute  attributeName      and then      getServletContext   getRequestDispatcher   file jsp   forward      Then it will be accessible in the JSP   As a side note - in your jsp avoid using java code  Use JSTL

User · Answer

If you are using Action  Actionforward way to process business logic and next page to show  check out if redirect is called  As many others pointed out  redirecting doesn t keep your original request since it is basically forcing you to make a new request to designated path  So the value set in original request will be vanished if you use redirection instead of requestdispatch

User · Answer

When using setAttribute and getRequestDispatcher on doGet  make sure that you are accessing your pages with the urlPatterns    login  for example  defined for your servlet  If you do it with   login jsp  your doGet won t get called so none of your attributes will be available

User · Answer

It will fail to work when    You are redirecting the response to a new request by response sendRedirect  page jsp    The newly created request object will of course not contain the attributes anymore and they will not be accessible in the redirected JSP  You need to forward rather than redirect  E g   request setAttribute  name    value    request getRequestDispatcher  page jsp   forward request  response    You are accessing it the wrong way or using the wrong name  Assuming that you have set it using the name  name   then you should be able to access it in the forwarded JSP page as follows     name

User · Answer

You could set all the values into the response object before forwaring the request to the jsp  Or you can put your values into a session bean and access it in the jsp

User · Answer

You can also use RequestDispacher and pass on the data along with the jsp page you want   request setAttribute  MyData   data   RequestDispatcher rd   request getRequestDispatcher  page jsp    rd forward request  response

User · Answer

Simple way which i found is   In servlet   You can set the value and forward it to JSP like below  req setAttribute  myname  login   req getRequestDispatcher  welcome jsp   forward req  resp      In Welcome jsp you can get the values by    lt  String name    String request getAttribute  myname      gt   lt    name  gt     or  directly u can call   lt    request getAttribute  myname     gt

User · Answer

This is an servlet code which contain a string variable a  the value for a is getting from an html page with form   then set the variable into the request object  then pass it to jsp using forward  and requestdispatcher methods   String a req getParameter  username    req setAttribute  name   a   RequestDispatcher rd req getRequestDispatcher   login jsp    rd forward req  resp     in jsp follow these steps shown below in the program   lt  String name  String request getAttribute  name    out print  your name  name    gt

User · Answer

Besides using an attribute to pass information from a servlet to a JSP page  one can also pass a parameter   That is done simply by redirecting to a URL that specifies the JSP page in question  and adding the normal parameter-passing-through-the-URL mechanism   An example   The relevant part of the servlet code   protected void doGet  HttpServletRequest request  HttpServletResponse response   throws ServletException  IOException       response setContentType   text html            processing the request not shown                  here we decide to send the value  bar  in parameter         foo  to the JSP page example jsp      response sendRedirect   example jsp foo bar         And the relevant part of JSP page example jsp    lt       String fooParameter   request getParameter   foo         if   fooParameter    null           gt       lt p gt No parameter foo given to this page  lt  p gt   lt             else         gt       lt p gt The value of parameter foo is  lt    fooParameter toString     gt   lt  p gt   lt           gt

[jsp] Pass variables from servlet to jsp

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