Refresh Your Java - Before Java Interview
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Since forward() method of RequestDispatcher is
handled on the server , therefore the request and its associated
session are
available to the forwarded
resource and you can pass data between them using
request.setAttribute(). forward() separates the
responsibilities for handling the requests among several
components. This method generally sends a request and
response
object to resources (servlets or JSP's)
of the same ServletContext.
RequestDispatcher.forward()
and PageContext.forward() are effectively the same
RequestDispatcher
dispatcher =
getServletContext().getRequestDispatcher("/web/tes.jsp");
dispatcher.forward(req, resp);
sendRedirect() method of a response object sends the url to the
browser that includes the parameter of sendRedirect()
method Browser treats this a new request from the client.
sendRedirect() forwards a requests to a resource outside of
the
current web application. Using sendRedirect is similar to open a new
browser and type your url. A sendRedirect() also
updates
the browser history and transfers control only
when the whole service method completes. There is only one way to
pass data is
through the session or using web parameters
(url?name=value).
resp.sendRedirect(""/web/tes.jsp"); // Considered as new Request in the browser
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