A simple Java project demonstrating JWT (JSON Web Token) authentication without Spring Security.
This project includes JWT generation and validation using a custom filter.

• Generate JWT tokens for authentication
• Validate JWT tokens for protected endpoints
• Simple Java implementation using Servlet Filter
• No Spring Security integration

src/main/java
├── com.example.Jwt_project
│ ├── config
│ │ └── JwtFilter.java
│ ├── controller
│ | └── AuthController.java
| | └── WelcomeController.java
│ ├── util
│   └── JwtUtil.java

• JwtUtil.java: Contains methods to generate and validate JWT tokens.
• JwtFilter.java: Servlet filter that checks Authorization header and validates the JWT.
• Main.java / Controller: (Optional) Your endpoint to test login and token validation.

This project uses Maven to manage dependencies. Main dependencies include:

<dependencies>
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-web</artifactId>
		</dependency>

		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-test</artifactId>
			<scope>test</scope>
		</dependency>

		<dependency>
			<groupId>io.jsonwebtoken</groupId>
			<artifactId>jjwt-api</artifactId>
			<version>0.11.5</version>
		</dependency>
		<dependency>
			<groupId>io.jsonwebtoken</groupId>
			<artifactId>jjwt-impl</artifactId>
			<version>0.11.5</version>
			<scope>runtime</scope>
		</dependency>
		<dependency>
			<groupId>io.jsonwebtoken</groupId>
			<artifactId>jjwt-jackson</artifactId>
			<version>0.11.5</version>
			<scope>runtime</scope>
		</dependency>

	</dependencies>

Clone the repository:

• git clone https://github.com/username/simple-jwt-project.git

• Login endpoint: /login → Returns JWT token
• Protected endpoint: Any other URL → Must pass JWT token in Authorization: Bearer header

• This is a simple JWT project for learning purposes.
• It is not integrated with Spring Security or any framework.

• Link: https://docs.google.com/document/d/1TZ9N8M1iNgrOrkK1-DPq9tb9J8ab0fAOHblbw0507rA/edit?usp=sharing