The main important difference between the forward() and sendRedirect() method is that in case of forward(), redirect happens at server end and not visible to client , but in case of sendRedirect(), redirection happens at client end and it’s visible to client.
What is difference between ServletResponse sendRedirect () and RequestDispatcher forward () method?
A RequestDispatcher forward() is used to forward the same request to another resource whereas ServletResponse sendRedirect() is a two step process. In sendRedirect(), web application returns the response to client with status code 302 (redirect) with URL to send the request.
What is the difference between response sendRedirect () and request forward ()?
This transfer of control is done by the container internally and browser / client is not involved. This is the major difference between forward and sendRedirect. When the forward is done, the original request and response objects are transfered along with additional parameters if needed .
What is difference between forward and include in RequestDispatcher?
Junior developers often get confused between the include and the forward methods of the RequestDispatcher. The key difference between the two is the fact that the forward method will close the output stream after it has been invoked , whereas the include method leaves the output stream open.
How does Response sendRedirect work?
sendRedirect() method redirects the response to another resource . This method actually makes the client(browser) to create a new request to get to the resource. The client can see the new url in the browser. sendRedirect() accepts relative URL, so it can go for resources inside or outside the server.
What is JSP life cycle?
A JSP life cycle is defined as the process from its creation till the destruction . This is similar to a servlet life cycle with an additional step which is required to compile a JSP into servlet.
What is servlet life cycle?
A servlet life cycle can be defined as the entire process from its creation till the destruction . ... The servlet is initialized by calling the init() method. The servlet calls service() method to process a client’s request. The servlet is terminated by calling the destroy() method.
How do I forward one servlet to another?
- RequestDispatcher rd=request.getRequestDispatcher(“servlet2”);
- //servlet2 is the url-pattern of the second servlet.
- rd.forward(request, response);//method may be include or forward.
How does request forwarding work?
- The request will be further processed on the server side.
- The client isn’t impacted by forward, URL in a browser stays the same.
- Request and response objects will remain the same object after forwarding. Request-scope objects will be still available.
What are the techniques for session tracking?
- Cookies.
- Hidden Form Field.
- URL Rewriting.
- HttpSession.
Why RequestDispatcher is been used?
The servlet container creates the RequestDispatcher object, which is used as a wrapper around a server resource located at a particular path or given by a particular name . This interface is intended to wrap servlets, but a servlet container can create RequestDispatcher objects to wrap any type of resource.
How the request getRequestDispatcher () will be created?
The getRequestDispatcher() method of the Servlet Request interface returns the object of the Request Dispatcher. RequestDispatcher rs = request. ... After creating the RequestDispatcher object, developers will call the forward() or include() method as per the application’s requirement.
What is include and forward method?
You should use include() method to load a resource which could be a JSP page or another Servlet, and use forward() to redirect the request to another resource for further processing, again you can forward the request to another Servlet or JSP page.
How do I send a parameter in response sendRedirect?
Generally, you cannot send a POST request using sendRedirect() method. You can use RequestDispatcher to forward() requests with parameters within the same web application, same context. RequestDispatcher dispatcher = servletContext(). getRequestDispatcher(“test.
Which one is the correct order of phases in jsp life cycle?
Which one is the correct order of phases in JSP life cycle? Explanation: The correct order is Compilation, Initialization, Execution, Cleanup .
What is meant by sendRedirect?
On a Web site, redirection is a technique for moving visitors to a different Web page than the one they request , usually because the page requested is unavailable. Web users often encounter redirection when they visit the Web site of a company whose name has been changed or which has been acquired by another company.
