example of ServletConfig Interface

Question : ServletConfig Interface

Ans : An object of ServletConfig is created by the web container for each servlet. This object can be used to get configuration information from web.xml file.

         If the configuration information is modified from the web.xml file, we don't need to change the servlet. So it is easier to manage the web application if any specific content is modified from time to time.

Question : Advantage of ServletConfig

Ans : The core advantage of ServletConfig is that you don't need to edit the servlet file if information is modified from the web.xml file.

Question : Methods of ServletConfig interface?

Ans : 

1.     public String getInitParameter(String name):Returns the parameter value for the specified parameter name.

2.     public Enumeration getInitParameterNames():Returns an enumeration of all the initialization parameter names.

3.     public String getServletName():Returns the name of the servlet.

public ServletContext getServletContext():Returns an object of ServletContext.

How to get the object of ServletConfig

1.     getServletConfig() method of Servlet interface returns the object of ServletConfig.

Syntax of getServletConfig() method

1.     public ServletConfig getServletConfig();  

Example of getServletConfig() method

1.     ServletConfig config=getServletConfig();  

2.     //Now we can call the methods of ServletConfig interface  

Syntax to provide the initialization parameter for a servlet

The init-param sub-element of servlet is used to specify the initialization parameter for a servlet.

1.     <web-app>  

2.       <servlet>  

3.         ......  

4.           

5.         <init-param>  

6.           <param-name>parametername</param-name>  

7.           <param-value>parametervalue</param-value>  

8.         </init-param>  

9.         ......  

10.     </servlet>  

11.   </web-app>  

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