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Java Servlet Programing Laungage

Java Servlet Projects

Servlet Project 3

Java Servlet :HttpSession Object and methods of HttpSession
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HttpSession Object(javax.servlet.http.HttpSession) : Servlet API provides HttpSession interface ,implementation pf which is provided by vendor. An object of type HttpSession can be created by the server per user.This object can be used by the application developer to store user specific information in the form of attributes between requests.

Commonly used methods of HttpSession

  • setAttribute()
    public void setAttribute (String name,Object value);
  • getAttribute()
    public Object getAttribute(String name);
  • getAttributeNames()
    public Enumeration getAttributeNames();
  • removeAttribute()
    public boolean removeAttribute();
  • isNew() is used to find out whether session object is created in the current request or not.
    public boolean isNew();
  • setMaxInactiveInterval() is used to specify maximum time in seconds for which a session object is maintained on the server even if no request is received from the client.
    public void setMaxInactiveInterval(int seconds);
  • invalidate() is used to release the interaction/session.
     public void invalidate();
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