How to use cookies to enable cross-context communication.

To make the cookies available to other apps you need to set setPath() method to the root path by using cooki.setPath("/");

Servlet Code:

Cookie cooki = new Cookie("session","visu");

System.out.print("Cookie setting for first time");

cooki.setPath("/");

cooki.setMaxAge(10); //48*60*60

response.addCookie(cooki);

response.sendRedirect("/SessionExample/MyJsp.jsp");

JSP Code:

Cross-Context using cookies:

<%

Cookie[] cookieArr = request.getCookies();

int i = 0;

while( cookieArr!=null && i <>

Cookie cookie = cookieArr[i];

System.out.println( cookie.getName()+" = " + cookie.getValue() );

out.print(cookie.getName()+" = " + cookie.getValue() );

i++;

}

%>

Advantages of cookies:

You can tell a cookie to stay alive even AFTER the browser restarted (or) the user hasn’t been on the site for a week. This can be achieved using cooki.setMaxAge(10); (//48*60*60) method.