Example of ServletConfig to get initialization parameter

Question : Example of ServletConfig to get initialization parameter
Ans : we are getting the one initialization parameter from the web.xml file and printing this information in the servlet.

DeServlet.java

1.     import java.io.*;  

2.     import javax.servlet.*;  

3.     import javax.servlet.http.*;  

4.       

5.     public class DeServlet extends HttpServlet {  

public void doGet(HttpServletRequest request, HttpServletResponse response)  

    throws ServletException, IOException {  

  

    response.setContentType("text/html");  

    PrintWriter out = response.getWriter();  

      

    ServletConfig config=getServletConfig();  

    String driver=config.getInitParameter("driver");  

    out.print("Driver is: "+driver);  

          

    out.close();  

    }  

6.       

7.     }  

web.xml

1.     <web-app>  

2.       

3.     <servlet>  

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

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

6.       

7.     <init-param>  

8.     <param-name>driver</param-name>  

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

10.   </init-param>  

11.     

12.   </servlet>  

13.     

14.   <servlet-mapping>  

15.   <servlet-name>DeServlet</servlet-name>  

16.   <url-pattern>/servlet1</url-pattern>  

17.   </servlet-mapping>  

18.     

19.   </web-app>  


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