Routing

Goal

This snapshot advances Gearcart Market by teaching you to register shop routes for catalog, cart, and health.

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

Named routes keep template links stable when URLs change.

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

Walkthrough

Add home, about, health, and placeholder catalog routes.

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

@GetMapping("/")
String home(Model model) { return "home"; }

Run and verify

Enter 02-Routing, 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.

git clone https://github.com/michaeldunga1/fcc-spring-ecommerce.git
cd fcc-spring-ecommerce/02-Routing
cp .env.example .env
./mvnw spring-boot:run

Troubleshooting

A 404 usually means the verb or URI does not match the router table.

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

Add a named /contact route and link it from the layout.

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