![]() Run above Simple.java as usual where you will get the following output: * Called before the Filter instance is removed from service by the web Pass request back down the filter chain Public void doFilter (ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException String testParam = config.getInitParameter ("test-param") Public void init (FilterConfig config) throws ServletException description: It gives the description of the parameter Annotation Example in Servlet.value: It gives the value of the parameter.name: It gives the name of the parameter.Out.print is used on a Servlet or Filter implementation class to specify an initialization parameter for a servlet or filter. Public void doGet (HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException Private static final long serialVersionUID = 1L Import class SimpleWebServlet extends HttpServlet SimpleWebServlet.java import java.io.IOException value: It gives the Array of URL patterns.urlPatterns: It gives the URL patterns of the servlet.smallIcon: It gives the small-icon of the servlet.name: It gives the name of the servlet.loadOnStartup: It gives the load-on-startup order of the servlet.largeIcon: It gives the large-icon of the servlet.initParams: It gives the init parameters of the servlet.displayName: It gives the display name of the servlet.description: It gives the description of the servlet.asyncSupported: It declares whether the servlet supports asynchronous operation mode.This annotation is processed by the container at deployment time and the corresponding servlet made available at the specified URL class TheServlet extends ( WebListener: It is used to declare a Web Listener.WebServlet: It is used to declare a servlet.WebInitParam: It is used on a Servlet or Filter implementation class to specify an initialization parameter.WebFilter: It is used to declare a servlet filter.ServletSecurity: It is used on a servlet implementation class to specify security constraints to be enforced by a Servlet container on HTTP protocol messages. ![]() MultipartConfig: It may be specified on a servlet class, indicating that instances of the Servlet except for requests that conform to the multipart/form-data MIME tags.HttpMethodConstraint: It is used within the ServletSecurity annotation to represent security constraints on specific HTTP protocol messages. ![]() HttpConstraint: It is used within the ServletSecurity annotation to represent the security constraints to be applied to all HTTP protocol methods for which a corresponding HttpMethodConstraint element does NOT occur within the ServletSecurity annotation.HandlesTypes: It is used to declare the class types that a ServletContainerInitializer can handle.The annotated classes will be processed by the Servlet Containers at the time of application deployment. The package contains a number of annotations that allow users to use annotations to declare servlets, filters, listeners, and specify the metadata for the declared component. These annotations are used to avoid writing the web.xml file. ![]() Servlet Annotations are introduced in Servlet API 2.5 (JEE 5.0, JSE 5.0).
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