What is the difference between requestdispatcher.forward and response.sendredirect

The forward method is faster than sendRedirect method. In the case of requestDispatcher redirect using forward, and we want to use the same data in a new resource JSP, Servlet , we can use request.

Example : request. Which one is good sendRedirect or Request Dispatcher? It depends upon your need for which method is more useful.

To forward the client request to another Servlet to honour that is, client calls a Servlet but response to client is given by another Servlet.

What is difference between ServletConfig and ServletContext? The servletconfig object refers to the single servlet whereas servletcontext object refers to the whole web application. For understanding, this is like a application global variable mechanism for a single web application deployed in only one JVM. The ServletContext object is contained within the ServletConfig object. What are implicit objects in JSP? JSP - Implicit Objects. These Objects are the Java objects that the JSP Container makes available to the developers in each page and the developer can call them directly without being explicitly declared.

JSP Implicit Objects are also called pre-defined variables. What does request dispatcher do? Request Dispatcher is an interface whose implementation defines an object which can dispatch the request to any resources on the server.

In this tutorial, we will see how the javax. RequestDispatcher interface is used to forward or include the response of a resource in a Servlet. Can using bleach cause cancer? Servlet container forwards the same request to next resource. Browser is not involved in forwarding the request. Forwarded URL must be on the same server. If forwarded URL is not found on the same server, then server will respond as Not Found error to the browser.

Browser is unaware of forwarding to next URL using forward method. You can not see the forwarded URL address in browser. Browser creates new request to get next URL in sendRedirect method. Consider saving request parameters from previous request in session, so that saved data can be accessible in new request on the server. You can use the RequestDispatcher for this. If a POST is successful, you normally want to redirect the request, so that the request won't be resubmitted when the user refreshes the request e.

Refreshing the request would then only refresh the redirected request and not the initial request. This will avoid "double submits" and confusion and bad user experiences. When we use the forward method, the request is transferred to another resource within the same server for further processing. In the case of forward , the web container handles all processing internally and the client or browser is not involved.

When forward is called on the requestDispatcher object, we pass the request and response objects, so our old request object is present on the new resource which is going to process our request. When we redirect using forward, and we want to use the same data in a new resource, we can use request. In case of sendRedirect , the request is transferred to another resource, to a different domain, or to a different server for further processing.

When you use sendRedirect , the container transfers the request to the client or browser, so the URL given inside the sendRedirect method is visible as a new request to the client.