Forward: is faster, the client browser is not involved, the browser displays the original URL, the request is transfered do the forwarded URL.
Redirect: is slower, the client browser is involved, the browser displays the redirected URL, it creates a new request to the redirected URL. What is sendRedirect in Servlet? The sendRedirect method of HttpServletResponse interface can be used to redirect response to another resource, it may be servlet, jsp or html file.
It accepts relative as well as absolute URL. It works at client side because it uses the url bar of the browser to make another request. What is difference between forward and redirect? The Forward method forwards a request from one servlet to another resource in a web application and this resource can be another servlet, JSP page, or HTML file.
The Redirect method, on the other hand, redirects the request to a different application. You cannot do this with a forward method. How do I redirect from one servlet to another? To forward request from one servlet to other either you can user RequestDispatcher or SendRedirect. To use RequestDispatcher you must have to get ServletContext reference and then you have to call the getRequestDispatcher method of ServletContext and using SendRedirect you have to write response.
What is the difference between Servletconfig and ServletContext interface? The servletconfig object refers to the single servlet whereas servletcontext object refers to the whole web application.
That is, you can pass initialization parameters to the servlet using the web. For understanding, this is similar to a constructor in a java class. Can we call servlet from JSP? Our web container handles this and transfers the request using a browser, and this request is visible in the browser as a new request. Sometimes this is also called a client-side redirect. Forward :. This method is declared in RequestDispatcher Interface.
Signature : forward ServletRequest request, ServletResponse response. This method is used to pass the request to another resource for further processing within the same server , another resource could be any servlet, jsp page any kind of file.
This process is taken care of by a web container when we call forward method request is sent to another resource without the client being informed, which resource will handle the request it has been mention on requestDispatcher object which we can get in two ways either using ServletContext or Request. This is also called a server-side redirect. When we use the forward method request is transferred to other resources within the same server for further processing.
In case of sendRedirect request is transferred to another resource to a different domain or different server for further processing. In case of forward Web container handle all process internally and client or browser is not involved. When you use the SendRedirect container transfers the request to the client or browser so url given inside the sendRedirect method is visible as a new request to the client.
When forward is called on requestdispather object we pass request and response object so our old request object is present on new resource which is going to process our request.
Visually we are not able to see the forwarded address, its is transparent. Using the forward method is faster than send a redirect. SendRedirect is slower because one extra round trip is required because a completely new request is created and the old request object is lost. Two browser requests required. When we redirect using forward and we want to use the same data in a new resource we can use the request.
But in sendRedirect if we want to use we have to store the data in session or pass along with the URL. Any kind of online payment when we use the merchant site will redirect us to the net banking site which is a completely new request it processes our request and again redirect to the merchant site?
In Banking Application when we do login normally we use the forward method. It depends upon the scenario that which method is more useful. If you want control is transfer to a new server or context and it is treated as a completely new task then we go for Send Redirect.
Normally forward should be used if the operation can be safely repeated upon a browser reload of the web page will not affect the result. SendRedirect and forward methods are still very useful while programming or working on any web application project using servlet jsp. Some more interview post you may find Interesing. Key differences between Vector and ArrayList in java. Difference between StringBuffer and StringBuilder.
How HashMap works in java. Why multiple inheritances is not supported in Java. Why Operator overloading is not supported in Java. Must be added after the jump redirect return, or else jump though the page, but also performs jump behind the statement, forwarding is performed jump page, the following code would not be executed.
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Only absolute URLs are allowed. Improve this answer. Note: you can do response. SendRedirect : This method is declared in HttpServletResponse Interface Signature: void sendRedirect String url This method is used to redirect client request to some other location for further processing ,the new location is available on different server or different context.
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