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25 lut 2015 · When servlet is initialised, init () method is called which initialize objects. What is the use of init () method when both constructor and init () serves the same purpose i.e initialization of object. In Init () method can be do initialization of some object like a database.
Servlet container calls servlet init() method before handling client requests. It is called just one times after servlet is created. By default it does nothing. You can override this method and it is also good for performing one-time activities.
Why do we need a constructor in a servlet if we use the init method? The init() method is by which a servlet Container will run to configure the Servlet. It provides a servletConfig object which gives the Servlet instance access to the ServletContext and other configuration elements from the deployment descriptor. Explain about Single Thread Model
13 sty 2022 · To get started with Servlets, let’s first start with a simple Servlet application i.e LifeCycle application, that will demonstrate the implementation of the init(), service() and destroy() methods.
A Servlet is an interface defined in a javax.servlet package. It declares three essential methods for the life cycle of a servlet, init(), service() and destroy(). When the servlet is called for the first time, the Servlet Container loads the servlet class and calls its init() method.
8 sty 2024 · In this example, we’ve shown how to define servlet initialization parameters by using annotations, and how to access them with the getInitParameter() method.
The init method is quite simple: it calls the super.init method to manage the ServletConfig object and log the initialization, and sets a private field. If the BookDBServlet used an actual database, instead of simulating one with an object, the init method would be more complex.
