Understanding ServletConfig and ServletContext

In our servlet application development, some of the programmers will write fixed coding [ standard lines ], with in the servlet, which is not recommended.  For example, if we write database related code in our servlet, in future if we would like to change any DB credentials in our servlet, we have to open > update > save > compile > re-deploy.  By any chance, what if we need to modify 50+ servlet classes ? its really tedious.

In order to gain the performance of the web application by eliminating the duplicate source code, it is highly recommended to use the fixed technical database details in the web.xml file, web.xml provides external fixed technical details to the servlet.

So in order to develop flexible servlets we make use of web.xml and ServletConfig and ServletContext, let us see one by one in detail.

You Might Also Like

• Difference between ServletConfig and ServletContext in Java
• Example of ServletContext in Java
• Example of ServletConfig in Java Servlet
• Example on getParameterValues() method of Servlet Request
• Example on getParameterMap() method of Servlet Request Object

::. About the Author .::
		Sivateja Kandula - Java/J2EE Full Stack Developer Founder of Java4s - Get It Yourself, A popular Java/J2EE Programming Blog, Love Java and UI frameworks. You can sign-up for the Email Newsletter for your daily dose of Java tutorials.