What is the difference between encodeRedirectURL and encodeURL?
The encodeURL is used to encode the url for session tracking in forward and include mechanism. The encodeRedirectURL encodes the specified URL for use in the sendRedirect method.
What is the HttpServletResponse?
Extends the ServletResponse interface to provide HTTP-specific functionality in sending a response. For example, it has methods to access HTTP headers and cookies. The servlet container creates an HttpServletResponse object and passes it as an argument to the servlet’s service methods ( doGet , doPost , etc).
What is the use of response setHeader in Java?
setHeader() is method of Servlet response object to set HTTP response header. refresh is HTTP response header …so we use response. setHeader(“refresh”,”5″); it will auto refresh the page at interval of 5 second..
Which method sets the local of the response?
setLocale. Sets the locale of the response, if the response has not been committed yet. It also sets the response’s character encoding appropriately for the locale, if the character encoding has not been explicitly set using setContentType(java. lang.
How do I get HttpServletResponse?
How to get the HttpServletResponse in Struts 2
- ServletActionContext. Access HttpServletResponse via ServletActionContext class.
- ServletResponseAware. Access HttpServletResponse by implementing the ServletResponseAware interface and override the setServletResponse() method.
What is the difference between setHeader and addHeader methods?
addHeader: Adds a header to this message. The header will be appended to the end of the list. setHeader: Overwrites the first header with the same name. The new header will be appended to the end of the list, if no header with the given name can be found.
What is difference between forward and sendRedirect?
Difference between forward() and sendRedirect() method The forward() method works at server side. The sendRedirect() method works at client side. It sends the same request and response objects to another servlet. It always sends a new request.
What is RequestDispatcher in servlet?
public interface RequestDispatcher. Defines an object that receives requests from the client and sends them to any resource (such as a servlet, HTML file, or JSP file) on the server.
How do I get HttpServletRequest in struts2?
In Struts 2 , you can use the following two methods to get the HttpServletRequest object.
- ServletActionContext. Get the HttpServletRequest object directly from org. apache. struts2. ServletActionContext.
- ServletRequestAware. Make your class implements the org. apache. struts2. interceptor.
How is HttpServletRequest created?
In a typical Servlet container implementation if an HTTP request comes in, an HttpServletRequest is created right when the HTTP input data of the request is parsed by the Servlet container.
What is ServletRequest and ServletResponse?
ServletRequest and ServletResponse are two interfaces that serve as the backbone of servlet technology implementation. They belong to the javax. servlet package. Signature: public interface ServletRequest. Blueprint of an object to provide client request information to a servlet.
What is the use of response AddHeader?
The AddHeader method adds a new HTML header and value to the response sent to the client. It does not replace an existing header of the same name. After a header has been added, it cannot be removed.
What is a header in Nodejs?
The header tells the server details about the request such as what type of data the client, user, or request wants in the response. Type can be html , text , JSON , cookies or others.
How does Response sendRedirect work?
sendRedirect() method redirects the response to another resource, inside or outside the server. It makes the client/browser to create a new request to get to the resource. It sends a temporary redirect response to the client using the specified redirect location URL.
What is the key difference between using a and HttpServletResponse sendRedirect?
(a) forward executes on the client while sendRedirect() executes on the server.
What is RequestDispatcher and why it is used?
What is the role of RequestDispatcher?
The RequestDispatcher interface provides the facility of dispatching the request to another resource it may be html, servlet or jsp. This interface can also be used to include the content of another resource also. It is one of the way of servlet collaboration.
How do I get HttpServletRequest from interceptor?
To get the HttpServletRequest in an interceptor I used below code: HttpServletRequest request =(HttpServletRequest) ActionContext. getContext(). get(HTTP_REQUEST);
What is ServletActionContext?
ServletActionContext is not part of standard JSP/Servlet specs , it is provided by Struts, it provides a way to access to web objects like servlet parameters, request attributes and things like the HTTP session.