Dear Friends,
I have written a simple servlet which reads a init
parameter from the web.xml file and displays on the
browser. I'm a beginner and trying to learn simple
servlets, I have reached where I can read some init
params from the web.xml file and displays on the
browser, but all the simple servlets are working
without any hassle, but reading init parameter returns
null in the servlet, because I triend to print that on
to the console, but it returns null, please help me,
awaiting a reply, regards Raasi
web.xml looks like this
<?xml version="1.0" encoding="ISO-8859-1"?>
<!--
Copyright 2004 The Apache Software Foundation
Licensed under the Apache License, Version 2.0 (the
"License");
you may not use this file except in compliance with
the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in
writing, software
distributed under the License is distributed on an
"AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either
express or implied.
See the License for the specific language governing
permissions and
limitations under the License.
-->
<web-app xmlns="http://java.sun.com/xml/ns/j2ee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee
http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd"
version="2.4">
<display-name>Welcome to Tomcat</display-name>
<description>
Welcome to Tomcat
</description>
<!-- JSPC servlet mappings start -->
<servlet>
<servlet-name>org.apache.jsp.index_jsp</servlet-name>
<servlet-class>org.apache.jsp.index_jsp</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>org.apache.jsp.index_jsp</servlet-name>
<url-pattern>/index.jsp</url-pattern>
</servlet-mapping>
<servlet>
<servlet-name>HelloServlet</servlet-name>
<servlet-class>HelloServlet</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>HelloServlet</servlet-name>
<url-pattern>/HelloServlet</url-pattern>
</servlet-mapping>
<servlet>
<servlet-name>InternationalizedHelloWorld</servlet-name>
<servlet-class>com.jspbook.InternationalizedHelloWorld</servlet-class>
<init-param>
<param-name>greeting</param-name>
<param-value>Kisahairetu</param-value>
</init-param>
</servlet>
<servlet-mapping>
<servlet-name>InternationalizedHelloWorld</servlet-name>
<url-pattern>/InternationalizedHelloWorld</url-pattern>
</servlet-mapping>
<!-- JSPC servlet mappings end -->
</web-app>
my servlet code looks like this
package com.jspbook;
import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;
public class InternationalizedHelloWorld extends HttpServlet {
public void doGet(HttpServletRequest request, HttpServletResponse
response) throws IOException, ServletException {
response.setContentType("text/html");
PrintWriter out = response.getWriter();
String greeting;
greeting = (String)
getServletConfig().getInitParameter("balbeer");
if(greeting != null) {
System.out.println("lopaliki vachav");
out.println("<html>");
out.println("<head>");
out.println("<title>Shabbu Bhai</title>");
out.println("</head>");
out.println("<body>");
out.println("<h1>" + greeting + "</h1>");
out.println("</body>");
out.println("</html>");
}
else {
System.out.println("bayate unnav");
out.println("<html>");
out.println("<head>");
out.println("<title>Shabbu Bhai</title>");
out.println("</head>");
out.println("<body>");
out.println("<h1>Emiledura Dunna</h1>");
out.println("</body>");
out.println("</html>");
}
}
}