Java Spring Boot CRUD Application

This repository contains a complete Spring Boot CRUD web application with:

• REST API for CRUD operations
• Bootstrap-based HTML UI
• Unit and Integration Testing (JUnit + Spring Boot Test)
• Code Coverage via JaCoCo
• Maven build support (mvn clean install)
• Ready-to-run executable JAR

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Features

Feature	Description
Framework	Spring Boot 3 (Java 17)
Build Tool	Maven
Testing	JUnit 5 (Unit + Integration)
Code Coverage	JaCoCo integrated
Frontend	HTML5 + Bootstrap templates
Run Mode	Executable JAR (java -jar target/java-springboot-app-1.0.0.jar)

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Project Structure

java-springboot-app/
├── pom.xml
├── src
│   ├── main
│   │   ├── java/com/example/demo
│   │   │   ├── DemoApplication.java
│   │   │   ├── controller/EmployeeController.java
│   │   │   ├── model/Employee.java
│   │   │   └── service/EmployeeService.java
│   │   └── resources
│   │       ├── application.properties
│   │       └── templates/
│   │           ├── index.html
│   │           └── form.html
│   └── test/java/com/example/demo
│       ├── UnitTest.java
│       └── IntegrationTest.java
└── target/

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Getting Started

Clone the repository

git clone https://github.com/rootpromptnext/java-springboot-app.git
cd java-springboot-app

Build and run tests

mvn clean test

This runs both unit and integration tests and generates a JaCoCo coverage report under:

target/site/jacoco/index.html

Package the app

mvn clean package

This generates an executable JAR at:

target/java-springboot-app-1.0.0.jar

Run the application

java -jar target/java-springboot-app-1.0.0.jar

App runs on: http://localhost:8080

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API Endpoints

Method	Endpoint	Description
GET	/api/employees	Get all employees
GET	/api/employees/{id}	Get employee by ID
POST	/api/employees	Create new employee
PUT	/api/employees/{id}	Update existing employee
DELETE	/api/employees/{id}	Delete employee

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Test CRUD via curl

# Create employee
curl -X POST -H "Content-Type: application/json" \
  -d '{"id":1,"name":"Alice","department":"HR"}' \
  http://localhost:8080/api/employees

# List all
curl http://localhost:8080/api/employees

# Get by ID
curl http://localhost:8080/api/employees/1

# Update employee
curl -X PUT -H "Content-Type: application/json" \
  -d '{"name":"Alice Smith","department":"Finance"}' \
  http://localhost:8080/api/employees/1

# Delete employee
curl -X DELETE http://localhost:8080/api/employees/1

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Testing Summary

Type	Framework	Command
Unit Tests	JUnit + Spring Boot Test	mvn test
Integration Tests	JUnit + MockMvc	mvn verify
Coverage	JaCoCo	target/site/jacoco/index.html