What is session getAttribute?
public Object getAttribute(String name): Returns the String object specified in the parameter, from the session object. If no object is found for the specified attribute, then the getAttribute() method returns null. public void removeAttribute(String name): Removes the given attribute from session.
Which are the session tracking techniques?
There are four techniques used in Session tracking:
- Cookies.
- Hidden Form Field.
- URL Rewriting.
- HttpSession.
How do I create a session object?
Accessing and Manipulating the Session Object
- Use the request. getSession() method of the HttpServletRequest object.
- Use the getAttribute(String name) or getAttributesNames() methods of the HttpSession object to retrieve attributes that are associated with it.
What is the purpose of HttpSession interface?
Interface HttpSession. Provides a way to identify a user across more than one page request or visit to a Web site and to store information about that user. The servlet container uses this interface to create a session between an HTTP client and an HTTP server.
What is session Tracking explain with example?
Session Tracking tracks a user’s requests and maintains their state. It is a mechanism used to store information on specific users and in order to recognize these user’s requests when they connect to the web server. HTTP is a stateless protocol where each request to the server is treated like a new request.
Which is the best session tracking techniques and why?
Session tracking API is built on top of the first four methods.
- User Authorization. Users can be authorized to use the web application in different ways.
- Hidden Fields.
- URL Rewriting. Original URL: http://server:port/servlet/ServletName.
- Cookies.
- Session tracking API.
What is session getAttribute in JSP?
setAttribute and getAttribute are the two most frequently used methods while dealing with session in JSP. getAttribute(String name) – The object stored by setAttribute method is fetched from session using getAttribute method. isNew() – Used to check whether the session is new. It returns Boolean value (true or false).
What is request getAttribute in JSP?
Suppose some data at the Server side has been created and now in order to pass that information in a JSP page, there is a need of request. getAttribute() method. The latter is used to pass Client side data to a JSP. Implementation. 1) First create data at the server side and pass it to a JSP.
Which method is used for session object?
The HttpServletRequest interface provides two methods to get the object of HttpSession: public HttpSession getSession():Returns the current session associated with this request, or if the request does not have a session, creates one.
What is session cycle?
Just to recap, session is a conversion between a server and a client. An elite way to manage the session in servlets is to use API. Any web server supporting servlets will eventually have to implement the servlet API.