What should be the URL pattern in Web XML?
Java Servlet url-pattern Specification:
- A string beginning with a ‘/’ character and ending with a ‘/*’ suffix is used for path mapping.
- A string beginning with a ‘*.
- A string containing only the ‘/’ character indicates the “default” servlet of the application.
- All other strings are used for exact matches only.
What pattern does a URL follow?
A URL pattern is a set of ordered characters to which the Google Search Appliance matches actual URLs that the crawler discovers. You can specify URL patterns for which your index should include matching URLs and URL patterns for which your index should exclude matching URLs.
Which tags are belongs to Web XML?
web. xml Deployment Descriptor Elements
- context-param.
- description.
- display-name.
- distributable.
- ejb-ref.
- ejb-local-ref.
- env-entry.
- error-page.
Which tag of deployment descriptor maps the internal name to the URL pattern?
< servlet > tag maps the internal name with the class name of the servlet.
What is use of URL pattern tag in servlet xml file?
url-pattern specifies the type of urls for which, the servlet given in servlet-name should be called. Be aware that, the container will use case-sensitive for string comparisons for servlet matching.
What is use of URL pattern tag in servlet XML file?
How do I create a URL pattern?
To create a custom URL pattern, start with a hostname, followed by path segments….Create a custom URL pattern.
| To match… | Create a custom URL pattern like… | Example matches to this URL pattern |
|---|---|---|
| The first subdomain segment ( * ) | *.example.com/foo | bar.example.com/foo baz.example.com/foo |
What are Web xml tags?
Tags used in web. xml file are: Welcome-file-list tag; This tag is used to specify the default page of web application if none is specified. In the above example session-config tag contains another tag session-timeout which specifies the http session timeout.
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.
Why web xml is called deployment descriptor?
Java web applications use a deployment descriptor file to determine how URLs map to servlets, which URLs require authentication, and other information. This file is named web. xml , and resides in the app’s WAR under the WEB-INF/ directory. xml is part of the servlet standard for web applications.
What is deployment descriptor web xml?
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.