Specifying Filter Mappings
Specifying Filter Mappings
Specifying Filter Mappings
A web container uses filter mappings to decide how to apply filters to web resources. A filter
mapping matches a filter to a web component by name, or to web resources by URL pattern.
The filters are invoked in the order in which filter mappings appear in the filter mapping list of a
WAR. You specify a filter mapping list for a WAR in its deployment descriptor, either with
NetBeans IDE or by coding the list by hand with XML.
To declare the filter and map it to a web resource using NetBeans IDE, do the following:
1. Expand the application's project node in the Project pane.
2. Expand the Web Pages and WEB-INF nodes under the project node.
3. Double-click web.xml.
4. Click Filters at the top of the editor pane.
5. Expand the Servlet Filters node in the editor pane.
FIGURE 43
Duke's Bookstore with Hit Counter
Filtering Requests and Responses
Chapter 4 · Java Servlet Technology
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