Win a copy of Svelte and Sapper in Action this week in the JavaScript forum!
  • Post Reply Bookmark Topic Watch Topic
  • New Topic
programming forums Java Mobile Certification Databases Caching Books Engineering Micro Controllers OS Languages Paradigms IDEs Build Tools Frameworks Application Servers Open Source This Site Careers Other all forums
this forum made possible by our volunteer staff, including ...
Marshals:
  • Campbell Ritchie
  • Ron McLeod
  • Paul Clapham
  • Bear Bibeault
  • Junilu Lacar
Sheriffs:
  • Jeanne Boyarsky
  • Tim Cooke
  • Henry Wong
Saloon Keepers:
  • Tim Moores
  • Stephan van Hulst
  • Tim Holloway
  • salvin francis
  • Frits Walraven
Bartenders:
  • Scott Selikoff
  • Piet Souris
  • Carey Brown

difference between request.getRequestDispatcher(),response.sendRedirect()

 
Ranch Hand
Posts: 57
Netbeans IDE MySQL Database Java
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
Please help me as soon as possible
 
Bartender
Posts: 3225
34
IntelliJ IDE Oracle Spring Chrome Java
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
Did you read about javax.servlet.http.HttpServletRequest? Its Documentation about the methods? And of course javax.servlet.http.HttpServletResponse
 
mike mimmis
Ranch Hand
Posts: 57
Netbeans IDE MySQL Database Java
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
yes but i couldn't understand it thats why..
 
Ranch Hand
Posts: 119
Oracle Opera Java
  • Likes 1
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
its the most common question in the interviews..

Forward( ) : javax.Servlet.RequestDispatcher interface.
- RequestDispatcher.forward( ) works on the Server.
- The forward( ) works inside the WebContainer.
- The forward( ) restricts you to redirect only to a resource in the same web-Application.
- After executing the forward( ), the control will return back to the same method from where the forward method was called.
- The forward( ) will redirect in the application server itself, it does'n come back to the client.
- The forward( ) is faster than Sendredirect( ) .

To use the forward( ) of the requestDispatcher interface, the first thing to do is to obtain RequestDispatcher Object. The Servlet technology provides in three ways.

1. By using the getRequestDispatcher( ) of the javax.Servlet.ServletContext interface , passing a String containing the path of the other resources, path is relative to the root of the ServletContext.
RequestDispatcher rd=request.getRequestDispatcher ("secondServlet");
Rd.forward(request, response);

2. getRequestDispatcher( ) of the javax.Servlet.Request interface , the path is relative to current HtpRequest.
RequestDispatcher rd=getServletContext( ).getRequestDispatcher("servlet/secondServlet");
Rd.forward(request, response);

3. By using the getNameDispatcher( ) of the javax.Servlet.ServletContext interface.
RequestDispatcher rd=getServletContext( ).getNameDispatcher("secondServlet");
Rd.forward(request, response);

Sendredirect( ) : javax.Servlet.Http.HttpServletResponce interface
- RequestDispatcher.SendRedirect( ) works on the browser.
- The SendRedirect( ) allows you to redirect trip to the Client.
- The SendRedirect( ) allows you to redirect to any URL.
- After executing the SendRedirect( ) the control will not return back to same method.
- The Client receives the Http response code 302 indicating that temporarly the client is being redirected to the specified location , if the specified location is relative , this method converts it into an absolute URL before redirecting.
- The SendRedirect( ) will come to the Client and go back,.. ie URL appending will happen.

Response. SendRedirect( "absolute path");
Absolutepath – other than application , relative path - same application.

When you invoke a forward request, the request is sent to another resource on the server, without the client being informed that a different resource is going to process the request. This process occurs completely with in the web container. When a sendRedirtect method is invoked, it causes the web container to return to the browser indicating that a new URL should be requested. Because the browser issues a completely new request any object that are stored as request attributes before the redirect occurs will be lost. This extra round trip a redirect is slower than forward.


 
mike mimmis
Ranch Hand
Posts: 57
Netbeans IDE MySQL Database Java
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
thanks atul.. I got some knowledge
 
What a show! What atmosphere! What fun! What a tiny ad!
the value of filler advertising in 2020
https://coderanch.com/t/730886/filler-advertising
    Bookmark Topic Watch Topic
  • New Topic