ServletContextListener is a class that receives alerts about changes to the servlet context and acts on them. When the context is initialised and deleted, the ServletContextListener is utilised to conduct crucial tasks.
In this example, we'll show you how to implement ServletContextListener to construct a custom listener class that runs your code before the web application starts. 1.1 Make a class with the ServletContextListener interface and implement it. 1.2 Include it in your deployment descriptor.
The ServletConfig parameters are unique to one servlet and are not shared by other servlets. It is employed for the purpose of initialization. Outside of any specific servlet, the ServletContext parameters are set for an entire application and are available to all servlets within that application.
The ServletContext object serves as a link between the container and the servlet. To access configuration information from the web.xml file, use the ServletContext object. Set, get, and remove attributes from the web using the ServletContext object.
For these ServletContextAware and ServletConfigAware interfaces, implement Spring *Aware interfaces.
Using the @Autowired annotation with ServletContext and ServletConfig bean variables.
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