Servlet inwards JEE platform provides 2 methods forward() as well as sendRedirect() to road an HTTP asking to about other Servlet for processing. Though, both are used for forwarding HTTP requests for farther processing at that spot are many differences betwixt forward() as well as sendRedirect() method e.g. frontward is performed internally past times Servlet, but a redirection is a two-step process, where Servlet instruct the spider web browser (client) to become as well as fetch about other URL, which is unlike from the original. That's why forward() is every bit good known every bit a server-side redirect as well as sendRedirect() is known every bit the client-side redirect. Becuase of their usefulness, the departure betwixt forward() as well as sendRedirect is every bit good a oft asked Servlet interview question. Let's run into a twain of to a greater extent than differences to answer this query better.
While working betwixt Servlet as well as JSP, yous volition often utilisation these asking re-direction methods similar include(), forward(), or sendRedirect(). Sometimes, yous volition include the response from other Servlet as well as sometimes it volition merely frontward the asking for processing to about other Servlet.
Btw, if yous are preparing for Java JEE interviews as well as learning this every bit utilisation of your interview preparation, yous should every bit good banking concern jibe the Java Programming Interview Exposed, 1 of the rare majority which covers all of import topics for Java JEE interviews. It covers kernel Java, Spring, Hibernate, JDBC as well as other advanced topics expected from both beginner as well as experienced Java programmers.
1) First as well as most of import departure betwixt the forward() as well as sendRedirect() method is that inwards instance of former, redirect happens at server destination as well as non visible to client, but inwards instance of later, redirection happens at customer destination as well as it's visible to client.
2) Another key departure betwixt forward() as well as sendRedirect() is that frontward is marginally faster than the redirect. The sendRedirect() is marginally slower than a forward, since it requires 2 browser requests, non one. See Head First Servlet as well as JSP for to a greater extent than details.
3) Third departure betwixt forward() as well as sendRedirect() method is that inwards instance of forward() master URL remains intact, piece inwards instance of sendRedirect() browser knows that it's making a novel request, as well as then master URL changes.
While working betwixt Servlet as well as JSP, yous volition often utilisation these asking re-direction methods similar include(), forward(), or sendRedirect(). Sometimes, yous volition include the response from other Servlet as well as sometimes it volition merely frontward the asking for processing to about other Servlet.
Btw, if yous are preparing for Java JEE interviews as well as learning this every bit utilisation of your interview preparation, yous should every bit good banking concern jibe the Java Programming Interview Exposed, 1 of the rare majority which covers all of import topics for Java JEE interviews. It covers kernel Java, Spring, Hibernate, JDBC as well as other advanced topics expected from both beginner as well as experienced Java programmers.
Forward vs SendRedirect inwards Servlet
Now, let's run into about of import differences betwixt sendRedirect() as well as forward() method of Servlet API:1) First as well as most of import departure betwixt the forward() as well as sendRedirect() method is that inwards instance of former, redirect happens at server destination as well as non visible to client, but inwards instance of later, redirection happens at customer destination as well as it's visible to client.
2) Another key departure betwixt forward() as well as sendRedirect() is that frontward is marginally faster than the redirect. The sendRedirect() is marginally slower than a forward, since it requires 2 browser requests, non one. See Head First Servlet as well as JSP for to a greater extent than details.
3) Third departure betwixt forward() as well as sendRedirect() method is that inwards instance of forward() master URL remains intact, piece inwards instance of sendRedirect() browser knows that it's making a novel request, as well as then master URL changes.
context (Some containers brand provisions for cross-context communication but this tends non to last real portable). But the sendRedirect() method tin give the sack last used to redirect users to resources that are non utilisation of the electrical flow context, or fifty-fifty inwards the same domain. See Head First Servlet as well as JSP for to a greater extent than details.
6) In the instance of forward, Since both resources are utilisation of the same context, the master asking context is retained. On the other hand, since post redirect involves a novel request, the previous asking orbit objects, amongst all of its parameters as well as attributes are no longer available after a redirect. (Variables volition demand to last passed past times via the session object).
That's all virtually the difference betwixt forward() as well as sendRedirect() inwards Servlet. It's 1 of the of import concepts to larn for Java spider web developers. It's non merely of import from the interview signal of thought but every bit good from writing real-world Java spider web application using Servlet, JSP, jQuery as well as other JEE technologies. Practically, yous volition convey several choices for redirecting HTTP asking e.g. yous tin give the sack produce as well as then past times using jQuery every bit well, but yous demand to utilisation sendRedirect() as well as forward() if yous desire to produce as well as then from Servlet.
Further Learning
Java Web Fundamentals By Kevin Jones
Spring Framework 5: Beginner to Guru
JSP, Servlets as well as JDBC for Beginners: Build a Database App
6) In the instance of forward, Since both resources are utilisation of the same context, the master asking context is retained. On the other hand, since post redirect involves a novel request, the previous asking orbit objects, amongst all of its parameters as well as attributes are no longer available after a redirect. (Variables volition demand to last passed past times via the session object).
That's all virtually the difference betwixt forward() as well as sendRedirect() inwards Servlet. It's 1 of the of import concepts to larn for Java spider web developers. It's non merely of import from the interview signal of thought but every bit good from writing real-world Java spider web application using Servlet, JSP, jQuery as well as other JEE technologies. Practically, yous volition convey several choices for redirecting HTTP asking e.g. yous tin give the sack produce as well as then past times using jQuery every bit well, but yous demand to utilisation sendRedirect() as well as forward() if yous desire to produce as well as then from Servlet.
Further Learning
Java Web Fundamentals By Kevin Jones
Spring Framework 5: Beginner to Guru
JSP, Servlets as well as JDBC for Beginners: Build a Database App
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