You
can pass the initialization parameters to a jsp page using web.xml.
The initialization parameters of the jsp are accessed to the same
jsp, not from other jsp files.
you
need a servlet mapping, When you're dealing with a JSP as a Servlet.
<servlet-name>JspInit</servlet-name>
<jsp-file>GetBook.jsp</jsp-file>
GetData.jsp
<%@page contentType="text/html" pageEncoding="UTF-8"%> <!DOCTYPE html> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> <title>Servlet Config</title> </head> <body> <form method="get" action="/jsp/JspInit"> <input type="submit" value="Click Me"> </form> </body> </html>
GetBook.jsp
<%@page contentType="text/html" pageEncoding="UTF-8"%> <!DOCTYPE html> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> <title>JSP Page</title> </head> <body> <h1> Author : <%= config.getInitParameter("Author") %> <br /> Book : <%= config.getInitParameter("Book") %> <br /> Blog : <%= config.getInitParameter("URL") %> </h1> </body> </html>
web.xml
<?xml version="1.0" encoding="UTF-8"?> <web-app version="3.1" xmlns="http://xmlns.jcp.org/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd"> <servlet> <servlet-name>JspInit</servlet-name> <jsp-file>GetBook.jsp</jsp-file> <init-param> <param-name>Author</param-name> <param-value>Krishna</param-value> </init-param> <init-param> <param-name>Book</param-name> <param-value>Self Learning Java</param-value> </init-param> <init-param> <param-name>URL</param-name> <param-value>self-learning-java-tutorial.blogspot.com</param-value> </init-param> </servlet> <servlet-mapping> <servlet-name>JspInit</servlet-name> <url-pattern>/JspInit</url-pattern> </servlet-mapping> </web-app>
Output
'config'
is implicit object provided by JSP container.
Related
Links
https://self-learning-java-tutorial.blogspot.com/2015/03/jsp-implicit-objects.html
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