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AuthenticationDB

a basic Java authentication system backed by MySQL. handles user registration, login, and session tokens.

what it does

register users with bcrypt-hashed passwords
login and get a session token (valid 7 days)
validate a token to see who's logged in
logout by deleting the token
auto-cleans up expired sessions

stack

Java 23, Maven
MySQL
jBCrypt for password hashing
JDBC for database access

setup

create the database using schema.sql
update credentials in Database.java to match your local MySQL setup
build with mvn package and run Main.java

usage

runs as a CLI, just pick from the menu:

0) Exit
1) Register
2) Login
3) Who am I
4) Logout