Classes
- Cookie Class: Its holds piece of information that is stored in client machine. Examples includes the details of a user who visited a site. In his next visit to the same website, information can be retrieved using cookie. Thus user activities can be tracked
- Using addCookie() of HTTPServletResponse, servlet can write a cookie with details like name, value, expiration of cookie and domain/path of cookie
Methods of Cookie Class
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String getName( )
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Provides Name
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String getValue( )
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Provides Value
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String getPath( )
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Provides Path that cookie holds
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int getVersion( )
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Provides the version of Cookie
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String getComment( )
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Comment of Cookie
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Object clone()
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Provides copy of object.
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void setValue(String v)
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Sets value in Cookie
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void setPath(String p_value)
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Sets path to p_value
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void setComment(String c_value)
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Sets comment to c_value
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void setSecure(boolean secure)
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Sets the security flag to secure.
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- HttpServlet Class: This is used while developing servlets that process and retrieves HTTP Requests. This class extends Generic Servlets
- All the methods takes HttpServletRequest(req) and HttpServletResponse(res) as parameters and returns void. All the methods throw I0Exception, ServletException
Methods of HttpServlet Class
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doGet(req,res)
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Handles HTTP GET Type of Requests
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doHead(req,res)
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Handles HTTP HEAD Type of Requests
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doOptions(req,res)
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Handles HTTP OPTIONS Type of Requests
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doPost(req,res)
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Handles HTTP POST Type of Requests
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doPut(req,res)
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Handles HTTP PUT Type of Requests
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doTrace(req,res)
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Handles HTTP TRACE Type of Requests
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doDelete(req,res)
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Handles HTTP DELETE Type of Requests
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servicereq,res)
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Called when request is received.
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- HttpSessionEvent Class: This works mainly based on events. This contains session events which extends EventObject. This class is created for every change in session
Methods of HttpSessionEvent Class
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HttpSession getSession( )
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Returns Session in which event occurred.
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- HttpSessionBindingEvent Class: This extends HTTPSessionEvent. In an HTTPSession Object, it is generated when a listener is bound or unbound
Methods of HttpSessionBindingEvent Class
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String getName()
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The name that is bound or unbound
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HttpSession getSession( )
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Returns the session to which listener is bound or unbound
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Object getValue( )
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Returns the value of attribute that is bound or unbound.
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