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java:webxml [2011/06/14 15:35] rlunarojava:webxml [2022/12/02 22:02] (current) – external edit 127.0.0.1
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 +====== The intrinsincs of web.xml ======
 +
 +I've messing around searching for someone who explains me clearly the intrinsics
 +of the configuration of the web.xml file and finally I've found something 
 +in a manual from oracle: 
 +
 +http://download.oracle.com/docs/cd/E13222_01/wls/docs70/webapp/webappdeployment.htm
 +
 +I attach here for the sake of not loose it: 
 +
 +{{:java:webapp.pdf}}
 +
 +And I don't want to loose the opportunity to to comment one thing: the issue of the
 +context parameters.
 +
 +===== What Context Parameters Are =====
 +
 +Context Parameters are this: parameters that the application --or a library, also 
 +known these days as **framework**-- can read from the ''web.xml'' file. 
 +
 +Here is the syntax to define a context parameter: 
 +
 +<code xml>
 +  <context-param>
 +  
 +     <param-name>user-defined parameter name</param-name>
 +     <param-value>user-defined parameter value</param-value>
 +     <description>optional description, just text</description>
 +     
 +  </context-param>
 +  
 +</code>
 +
 +
 +How can them be read: 
 +
 +<code java>
 +
 +javax.servlet.ServletContext.getInitParameter()
 +javax.servlet.ServletContext.getInitParameterNames()
 +
 +</code>
 +
 +
 +
 +