Parameterized constructor in servlet.

Question

Can I declare parameterized constructor inside servlet which is only constructor ?

If no then why ?

Answer 1

Since servlets are instantiated by the container they need a no-argument constructor.

Additionally the container may reuse servlets and will not call the constructor on reuse.

Answer 2

You'll need to initialize the variables through <servlet-param> or use a Framework like Spring which can allow you to Proxy the Servlet to a different class that acts just like any other bean.

Answer 3

See my answer to a similar question.