What is web xml or deployment descriptor example?

In a java web application a file named web. xml is known as deployment descriptor. When a request comes web server uses web. xml file to map the URL of the request to the specific code that handle the request.

What should I write in web xml?

Configuring and Mapping a Servlet. To configure a servlet in the web.xml file, you write this:
Servlet Init Parameters. You can pass parameters to a servlet from the web.xml file.
Servlet Load-on-Startup.

What is web xml deployment descriptor?

A deployment descriptor (DD) refers to a configuration file for an artifact that is deployed to some container/engine. For web applications, the deployment descriptor must be called web. xml and must reside in the WEB-INF directory in the web application root.

What is a servlet and explain its life cycle?

A servlet life cycle can be defined as the entire process from its creation till the destruction. The servlet calls service() method to process a client’s request. The servlet is terminated by calling the destroy() method. Finally, servlet is garbage collected by the garbage collector of the JVM.

What is a 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.

Do I Need WEB xml?

xml for servlet based application if you are using servlet version >3.0 and tomcat 7 as it will not run in the previous versions of tomcat. Annotation represents the metadata. If you use annotation, deployment descriptor (web. xml file) is not required.

Is Web xml a servlet?

This file is named web. xml , and resides in the app’s WAR under the WEB-INF/ directory. web. xml is part of the servlet standard for web applications.

What is the purpose of xml in a Web service?

Q 6 – What is the purpose of XML in a web service? A – A web services takes the help of XML to tag the data, format the data.

What is servlet in Web technology?

A servlet is a Java programming language class that is used to extend the capabilities of servers that host applications accessed by means of a request-response programming model. Although servlets can respond to any type of request, they are commonly used to extend the applications hosted by web servers.

In which folder we can put Web XML?

WEB-INF/ directory
This file is named web. xml , and resides in the app’s WAR under the WEB-INF/ directory. web. xml is part of the servlet standard for web applications.

What type of language is xml?

Extensible Markup Language
XML (Extensible Markup Language) is a markup language similar to HTML, but without predefined tags to use. Instead, you define your own tags designed specifically for your needs. This is a powerful way to store data in a format that can be stored, searched, and shared.