Design and implement a user login module with one$-$time verification code

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Name:

$$ Tasks

If you enter a valid username, password, and verification code, you will log in the system successfully and get the view with a link Quit to exit the system. Otherwise the view with login failure information will be show. If you click the link Quit, the system exits and show you the view to log in again. If you click the link Login, the home page will be shown again as follows.

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$$Objectives and Preparations

Objectives

To understand servlet technologyTo use Cookie and Session

To know verification code technology and its applications.

Preparations

Classes and interfaces

Servelt $$ GenericServlet $$ HttpServlet

Cookie and its API

Session and its API

Verification Code

$$ Requirements Analysis

$$Solutions

Provide your ideas and solutions

List your servlets and views with descriptions

$$ Codding and Debugging

$$ Conclusions