Example of ServletContext to get all the initialization parameters

Example of ServletContext to get all the initialization parameters

We are getting all the initialization parameter from the web.xml file. For getting all the parameters, we have used the getInitParameterNames() method in the servlet class.

DemoServlet.java

1.     import java.io.*;  

2.     import javax.servlet.*;  

3.     import javax.servlet.http.*;  

4.       

5.       

6.     public class DemoServlet extends HttpServlet{  

7.     public void doGet(HttpServletRequest req,HttpServletResponse res)  

8.     throws ServletException,IOException  

9.     {  

10.   res.setContentType("text/html");  

11.   PrintWriter out=res.getWriter();  

12.     

13.   ServletContext context=getServletContext();  

14.   Enumeration<String> e=context.getInitParameterNames();  

15.         

16.   String str="";  

17.   while(e.hasMoreElements()){  

18.       str=e.nextElement();  

19.       out.print("<br> "+context.getInitParameter(str));  

20.   }  

21.   }}  

web.xml

1.     <web-app>  

2.       

3.     <servlet>  

4.     <servlet-name>bschandel</servlet-name>  

5.     <servlet-class>DemoServlet</servlet-class>  

6.     </servlet>  

7.       

8.     <context-param>  

9.     <param-name>dname</param-name>  

10.   <param-value>sun.jdbc.odbc.JdbcOdbcDriver</param-value>  

11.   </context-param>  

12.     

13.   <context-param>  

14.   <param-name>username</param-name>  

15.   <param-value>system</param-value>  

16.   </context-param>  

17.     

18.   <context-param>  

19.   <param-name>password</param-name>  

20.   <param-value>oracle</param-value>  

21.   </context-param>  

22.     

23.   <servlet-mapping>  

24.   <servlet-name>bschandel</servlet-name>  

25.   <url-pattern>/context</url-pattern>  

26.   </servlet-mapping>  

27.     

28.   </web-app>  

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