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The basic Servlet package defines Java objects to represent servlet requests and responses, as well as objects to reflect the servlet's configuration parameters and execution environment. The Servlet API, contained in the Java package hierarchy javax.servlet, defines the expected interactions of the web container and a servlet. [4]
A web container (also known as a servlet container; [1] and compare "webcontainer" [2]) is the component of a web server that interacts with Jakarta Servlets.A web container is responsible for managing the lifecycle of servlets, mapping a URL to a particular servlet and ensuring that the URL requester has the correct access-rights.
The specific difference listed was that a servlet would intercept the request, place the content to render into a request attribute (typically represented by a JavaBean), then call a JSP to render the content in the desired output format. This model differed from the previous model in the fact that JSP technology was used as a pure template engine.
The session scope implies that the bean can be found in the HttpSession object. This bean can be accessed by all other JSPs and servlets that have access to the specified HttpSession object. The application scope implies that the bean can be found in the ServletContext object.
Singleton Session Beans [13] [14] are business objects having a global shared state within a JVM. Concurrent access to the one and only bean instance can be controlled by the container (Container-managed concurrency, CMC) or by the bean itself (Bean-managed concurrency, BMC).
In contrast, Struts and the Spring MVC Framework are action-oriented frameworks that provide a thinner abstraction layer over the servlet API. Apache Tiles is a templating framework designed to work with Struts. Facelets is a view definition and templating technology designed to work with JSF. SiteMesh can be used with any Jakarta Pages (JSP).
A Session object, for example, represents a session that maintains the state of variables from page to page. [1] The Active Scripting engine's support of the Component Object Model enables ASP websites to access functionality in compiled libraries such as dynamic-link libraries.
Two common examples are 'objects' in object-oriented programming, and the exact way that streaming video is transmitted. Encryption and Decryption are typically done at this level too, [ 9 ] although it can be done on the application , session , transport , or network layers , each having its own advantages and disadvantages.