How to create a secure login system for JSP? - security

Question

I was given a JSP page where anyone can just view the page source and find the Username and password. My task is to make it somewhat secure. After some reading, I figured I would want to implement an SHA-256 encryption system, but I am not too sure how to do this.
How should I store the hashed passwords? I have barely any experience with JSP / security, so I don't fully understand the steps. After a user enters his password, and it gets encrypted with SHA 256, does this string get compared to a string in a text file? What's the best way for this?
What is the difference between having the entire procedure done in one JSP file versus multiple. I notice how sometimes the login and encryption occurs in the same file while other times, the form uses other JSP files.

Answer 1

go for spring web mvc+spring security plug in it provides all you need with just xml and data base
<beans:beans xmlns="http://www.springframework.org/schema/security"
xmlns:beans="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/security
http://www.springframework.org/schema/security/spring-security.xsd">
<http auto-config="true" use-expressions="true">
<intercept-url pattern="/admin*" access="hasAnyRole('ROLE_Admin')" />
<form-login login-page="/login" default-target-url="/welcome"
authentication-failure-url="/loginfailed" />
<logout logout-success-url="/login" />
</http>
<authentication-manager>
<authentication-provider>
<password-encoder hash="sha256"/>
<jdbc-user-service data-source-ref="dataSource"
users-by-username-query="
select username,password, enabled
from users where username=?"
authorities-by-username-query="
select u.username, u.authority from users u
where u.username =? "
/>
</authentication-provider>
</authentication-manager>
</beans:beans>