Registration

Goal

This snapshot advances Gearcart Market by teaching you to validate customer accounts and store password hashes.

Every numbered folder is a complete app. Run this stage independently, then compare it with the previous folder.

Prerequisites

Use JDK 17+, Maven, and Docker for MySQL stages.

Port 8084 must be free. Copy .env.example before database stages.

• JDK 17+
• Maven
• Docker from part 4 onward

Concepts

Registration normalizes email, enforces uniqueness, hashes passwords, signs the user in, and regenerates the session.

Thymeleaf renders server HTML; Spring Security owns the session; JPA repositories persist catalog and orders.

Walkthrough

Build a registration form with CSRF-safe posts and validation errors.

Read the example, then open the matching snapshot. The repository includes validation, CSRF, and the surrounding structure.

user.setPassword(encoder.encode(raw));
userRepo.save(user);
return "redirect:/";

Run and verify

Enter 06-Registration, copy .env.example, start Docker MySQL, and run ./mvnw spring-boot:run on port 8084.

Open http://127.0.0.1:8084. From data lessons onward, Ada and Grace use password123.

docker compose up -d
git clone https://github.com/michaeldunga1/fcc-spring-ecommerce.git
cd fcc-spring-ecommerce/06-Registration
cp .env.example .env
./mvnw spring-boot:run

Troubleshooting

Duplicate email and password confirmation failures should redisplay field errors.

For database failures, confirm Docker and the gear_NN name. Never commit .env, target/, or secrets.

• Read the first exception first
• Rebuild assets after Tailwind class changes
• Never commit secrets

Try this

Try a short password, mismatched confirmation, and a duplicate email.

Test a happy path and one invalid or unauthorized request.

• Make one small change
• Test it in the browser
• Compare with the next snapshot only after it works