Session in Java simply refers to the time interval or time differences of which two systems (which are the server and the clients) communicate with each other. In other words, we can say a session is a state that consists of various requests and responses between the server and the clients.
The parameter that helps in managing session in Java is referred to as the HttpSession object. A session is consists of information which are specific to a user in particular throughout the whole application. If you are a new user, and you enter an online application or a website for the first time, you can obtain the HttpSession via request.getSession().
Then you will be given a unique ID for you to identify your session. The unique ID can either be stored in a request parameter or info a cookie. Httpsessioninterface is an interface provided by servlets in Java, and it consists of several methods.
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