| Name | Interface | Tomcat Impelementation |
|---|---|---|
| application | javax.servlet.ServletContext | org.apache.catalina.core.ApplicationContextFacade |
How to access servlet context parameters in jsp?
Servlet context parameter : <%=application.getInitParameter("param1")%>
JSP Implicit Object application Example (github)
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>ourownjava.com</title>
</head>
<body>
<!-- jsp implicit object application example -->
JSP implicit object application class : <%=application.getClass().getCanonicalName() %> <p/>
<!-- the above line will return org.apache.catalina.core.ApplicationContextFacade,
its an implementation of javax.servlet.ServletContext -->
<!-- servlet context parameters, application wide, jsp implicit object 'application' would make available
these parameters, class is javax.servlet.ServletContext
<context-param>
<param-name>param1</param-name>
<param-value>param1Value</param-value>
</context-param>
-->
<!-- access the above parameter from the web.xml -->
Servlet context parameter : <%=application.getInitParameter("param1")%>
</body>
</html>
Servlet Context Parameters in web.xml (github)
<?xml version="1.0" encoding="UTF-8"?> <web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" version="3.0"> <display-name>jsp.ourownjava.com</display-name> <welcome-file-list> <welcome-file>index.jsp</welcome-file> </welcome-file-list> <!-- servlet context parameters, application wide, jsp implicit object 'application' would make available these parameters, class is javax.servlet.ServletContext --> <context-param> <param-name>param1</param-name> <param-value>param1Value</param-value> </context-param> <!-- servlet init parameter, for this particlar servlet, jsp implicit object 'config' would make available these parameters, class is javax.servlet.ServletConfig --> <servlet> <servlet-name>jspImplicitObjectApplicationExample</servlet-name> <jsp-file>/jsp-implicit-object-application-example.jsp</jsp-file> <init-param> <param-name>servletConfigParm1</param-name> <param-value>servletConfigParam1Value</param-value> </init-param> </servlet> <servlet-mapping> <servlet-name>jspImplicitObjectApplicationExample</servlet-name> <url-pattern>/jsp-implicit-object-application-example.jsp</url-pattern> </servlet-mapping> </web-app>
How to run the example program?
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