What is welcome list in web xml?

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The welcome-file-list element of web-app, is used to define a list of welcome files. Its sub element is welcome-file that is used to define the welcome file. A welcome file is the file that is invoked automatically by the server, if you don’t specify any file name.

What should be included in web xml?

web. xml defines mappings between URL paths and the servlets that handle requests with those paths. The web server uses this configuration to identify the servlet to handle a given request and call the class method that corresponds to the request method (e.g. the doGet() method for HTTP GET requests).

What is a welcome file of a web application?

The welcome files mechanism allows you to specify a list of files that the web container will use for appending to a request for a URL (called a valid partial request) that is not mapped to a web component. For example, suppose that you define a welcome file welcome.

What is welcome file list?

What is context param in web xml?

The “context-param” tag is define in “web. xml” file and it provides parameters to the entire web application. For example, store administrator’s email address in “context-param” parameter to send errors notification from our web application.

What are filters in web xml?

What is JSP Filter?

Filters in web. xml are used for filtering functionality of the Java web application.
They intercept the requests from client before they try to access the resource.
They manipulate the responses from the server and sent to the client.

What is web-INF web xml?

DefaultWebApp/WEB-INF/weblogic. xml file is the WebLogic-specific deployment descriptor file that defines how named resources in the web. xml file are mapped to resources residing elsewhere in WebLogic Server. This file is also used to define JSP and HTTP session attributes.

What is web xml in JSP?

Registering a JSP as a Servlet (The web. xml file is located in the WEB-INF directory of your Web application.) A servlet container maintains a map of the servlets known to it. This map is used to resolve requests that are made to the container. Adding entries into this map is known as “registering” a servlet.

What is difference between 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 is the difference between context-param and Init param?

defines a value available to a single specific servlet within a context. defines a value available to all the servlets within a context.

What is difference between filter and interceptor?

Interceptors share a common API for the server and the client side. Whereas filters are primarily intended to manipulate request and response parameters like HTTP headers, URIs and/or HTTP methods, interceptors are intended to manipulate entities, via manipulating entity input/output streams.