Here’s a serlvet code example to demonstrate how to pass a parameter to whole web application by using ServletContext “init-param” in web.xml.
In the deployment descriptor (web.xml)
Put your parameter value in “init-param” and make sure outside the “servlet” element
<servlet>
<servlet-name>ServletName</servlet-name>
<servlet-class>com.mkyong.ServletDemo</servlet-class>
</servlet>
<context-param>
<param-name>email</param-name>
<param-value>[email protected]</param-value>
</context-param>
Servlet code
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws IOException{
PrintWriter pw = response.getWriter();
pw.println(getServletContext().getInitParameter("email"));
}
The “getServletContext().getInitParameter(“email”)” method is use to get the ServletContext parameter value in web.xml. In addition , this parameter is accessible by the whole web application.
Here’s a example to pass parameter to a servlet only
it was wrong “init-param” and make sure outside the “servlet” element
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thanks a lot