What is ServletContext object in JSP?
In JSP, application is an implicit object of type ServletContext. The instance of ServletContext is created only once by the web container when application or project is deployed on the server. It can also be used to get, set or remove attribute from the application scope.
What is Page context in JSP?
PageContext extends JspContext to provide useful context information for when JSP technology is used in a Servlet environment. A PageContext instance provides access to all the namespaces associated with a JSP page, provides access to several page attributes, as well as a layer above the implementation details.
What is 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.
How many ServletContext objects are available for?
one ServletContext object
There is only one ServletContext object per web application. If any information is shared to many servlet, it is better to provide it from the web.
How many ServletContext is available for an entire 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 a page context?
A PageContext instance provides access to all the namespaces associated with a JSP page, provides access to several page attributes, as well as a layer above the implementation details. An example of how PageContext, JspFactory, and other classes can be used within a JSP Page Implementation object is given elsewhere.
What is page scope in JSP?
page scope means, it can be thought of as an object that represents the entire JSP page,i.e. the JSP object can be accessed only from within the same page where it was created. The page object is really a direct synonym for the this object.
How many ServletContext is created for an application?
How can I get ServletContext and ServletConfig objects in a spring bean?
There are two ways to get Container specific objects in the spring bean:
- Implementing Spring *Aware interfaces, for these ServletContextAware and ServletConfigAware interfaces.
- Using @Autowired annotation with bean variable of type ServletContext and ServletConfig .
What is spring boot ServletContext?
Introduction. ServletConfig is used by only single servlet to get configuration information, whereas ServletContext is used by multiple objects to get configuration information. ServletContext object is global to entire web application and ServletContext object gets created during the web application deployment.
How to get servletcontext object in JSP?
using scriptlet also can get application object in jsp and if you are running on web_app version 3.0 and has Servlet 3.0 API you can directly get ServletContext object form HttpServletRequest as shown in below example: Read more: Thanks for answer. Use request.getSession().getServletContext() instead.
How to share servletcontext with other servlets?
There is one ServletContext per web application and all servlet share it. It can be retrieved via getServletContext () method. ServletContext has an “application” scope, and can also be used to pass information between servlets within the same application, via methods setAttribute (“name”, object) and getAttribute (“name”).
How is the servletcontext interface created in Java?
ServletContext Interface. An object of ServletContext is created by the web container at time of deploying the project. This object can be used to get configuration information from web.xml file. There is only one ServletContext object per web application.
How is a servlet used in a web application?
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.