What is servlet collaboration explain it with example?
What is Servlet Collaboration? The exchange of information among servlets of a particular Java web application is known as Servlet Collaboration. This enables passing/sharing information from one servlet to the other through method invocations.
Which of these is a ServletContext object?
The object of ServletContext provides an interface between the container and servlet. The ServletContext object can be used to get configuration information from the web. xml file. The ServletContext object can be used to set, get or remove attribute from the web.
What is ServletContext object?
ServletContext is the object created by Servlet Container to share initial parameters or configuration information to the whole application.
What is ServletContext interface?
Interface ServletContext. public interface ServletContext. Defines a set of methods that a servlet uses to communicate with its servlet container, for example, to get the MIME type of a file, dispatch requests, or write to a log file. There is one context per “web application” per Java Virtual Machine.
What is the difference between ServletConfig and ServletContext?
The servletconfig object refers to the single servlet whereas servletcontext object refers to the whole web application. ServletConfig is implemented by the servlet container to initialize a single servlet using init(). That is, you can pass initialization parameters to the servlet using the web.
What are the ways for servlet collaboration?
– The collaboration can be done by redirecting a servlet from another or loading the servlets from the ServletContext access methods. – This can also be achieved by the methods forward() and include() of RequestDispatcher or by sendRedirect() method. Servlets are java classes which run on a web server.
What is ServletContext object in JSP?
ServletContext. It is generated onetime by the web container when web application or web project is deployed on server. This object is used to acquire the initialization parameter from the configuration file (web. xml). It is used for allotting the attributes and the values of the attributes over all JSP page.
What is ServletConfig and ServletContext?
ServletConfig is used for sharing init parameters specific to a servlet while ServletContext is for sharing init parameters within any Servlet within a web application.
What are the ServletContext and ServletConfig objects What are servlet environment objects?
What is the number of ServletContext objects available for a web application?
one ServletContext
There’s only one ServletContext for an entire web app, and all the parts of the web app share it. But each servlet in the app has its own ServletConfig. The Container makes a ServletContext when a web app is deployed, and makes the context available to each Servlet and JSP (which becomes a servlet) in the web app.
What is ServletContext in JSP?
ServletContext. It is basically used for getting initialization parameters and for sharing the attributes & their values across the entire JSP application, which means any attribute set by application implicit object would be available to all the JSP pages. Methods: Object getAttribute(String attributeName)