Can a servlet mapping have more than one url pattern?
Although different patterns can map to the same servlet, the same pattern cannot map to two different servlets. If the same url-pattern appears more than once within a web.
Can we have multiple url pattern?
As far as I can see multiple url-pattern elements are not allowed and do not work as expected. @SebastianG: Your concrete problem is caused elsewhere. Note that support for multiple elements was introduced in Servlet 2.5 (part of Java EE 5, released almost 7 years ago).
What is url pattern in filter mapping?
The url-pattern element of a servlet-mapping or a filter-mapping associates a filter or servlet with a set of URLs. When a request arrives, the container uses a simple procedure for matching the URL in the request with a url-pattern in the web. xml file.
Can web xml have multiple servlet mapping?
You can declare multiple servlets using the same class with different initialization parameters. The name for each servlet must be unique across the deployment descriptor. The element specifies a URL pattern and the name of a declared servlet to use for requests whose URL matches the pattern.
What is chain doFilter?
doFilter(ServletRequest request, ServletResponse response) Causes the next filter in the chain to be invoked, or if the calling filter is the last filter in the chain, causes the resource at the end of the chain to be invoked.
What is filter mapping in web xml?
The filter-mapping element maps a URL pattern or servlet name to an instance of a filter. The filter-mapping always contains a filter-name element and a url-pattern element. The filter-name element must match a filter-name defined in a filter element elsewhere in the web. xml file.
What is dispatcher in filter mapping?
The dispatcher type of a request is used by the container to select the filters that need to be applied to the request: Only filters with matching dispatcher type and url patterns will be applied.
How many ServletContext objects are available for an entire web application?
one ServletContext
There’s only one ServletContext for an entire web app, and all the parts of the web app share it. But each servlet in the app has its own ServletConfig. The Container makes a ServletContext when a web app is deployed, and makes the context available to each Servlet and JSP (which becomes a servlet) in the web app.
What is the use of FilterChain doFilter?
doFilter. Causes the next filter in the chain to be invoked, or if the calling filter is the last filter in the chain, causes the resource at the end of the chain to be invoked.
Is it possible to map multiple URLs in a Filter Mapping?
Read more about this here. It says Previous versions of the servlet schema allows only a single url-pattern in a filter mapping.For filters mapped to multiple URLs this results in needless repetition of whole mapping clauses. Share Improve this answer
How many URL patterns does TomTom container support?
Tomcat container will support 3 url patterns: URL pattern #2 can be /somestring/* where somestring can include / characters. A fourth pattern, / on its own, specifies the default servlet of the application. Servlet Specification 3.1 supports a fifth pattern using “” (empty string).
Is it possible to map multiple URLs in a servlet?
It says Previous versions of the servlet schema allows only a single url-pattern in a filter mapping.For filters mapped to multiple URLs this results in needless repetition of whole mapping clauses. Share Improve this answer Follow edited Jul 1 ’13 at 21:13
What must the content of element type’servlet-mapping’match?
The content of element type “servlet-mapping” must match “(servlet-name,url-pattern)” 3 how tomcat identifies servlet specified with the annotations?