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This tag provides parameters to the entire context / web application.
Uses include things like defining an administrator email address to send errors from your application, or other settings that are relevant to your application as a whole.
See advantages of specifying parameter values in web.xml for reasons you would want to use this method.
To access the values from your Java/JSP code, use the following syntax:
String value = getServletContext().getInitParameter("parameterName");
A single <context-param> tag is used for each parameter.
The actual parameter name and value are set using <param-name> and <param-value>.
Example usage in web.xml:
<context-param>
<description>The email address of the administrator, used to send error reports.</description>
<param-name>webmaster</param-name>
<param-value>address@somedomain.com</param-value>
</context-param>
With the above example, you can extract the value of the webmaster parameter with:
String value = getServletContext().getInitParameter("webmaster");
