Adding JWT Dependencies to Your Spring Boot Project

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When working with JWT (JSON Web Token) in a Spring Boot application, the first step is to add the required JJWT library dependencies to your pom.xml file. The JJWT (Java JWT) library by io.jsonwebtoken is a powerful and easy-to-use Java library for creating and verifying JSON Web Tokens.

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Step 1: Add Dependencies (Latest version)

Include the following dependencies inside your project’s pom.xml:

<!-- https://mvnrepository.com/artifact/io.jsonwebtoken/jjwt-api -->
<dependency>
    <groupId>io.jsonwebtoken</groupId>
    <artifactId>jjwt-api</artifactId>
    <version>0.13.0</version>
</dependency>

<!-- https://mvnrepository.com/artifact/io.jsonwebtoken/jjwt-impl -->
<dependency>
    <groupId>io.jsonwebtoken</groupId>
    <artifactId>jjwt-impl</artifactId>
    <version>0.13.0</version>
    <scope>runtime</scope>
</dependency>

<!-- https://mvnrepository.com/artifact/io.jsonwebtoken/jjwt-jackson -->
<dependency>
    <groupId>io.jsonwebtoken</groupId>
    <artifactId>jjwt-jackson</artifactId>
    <version>0.13.0</version>
    <scope>runtime</scope>
</dependency>

---

Step 2: Why We Need These Three Modules

1. jjwt-api → Provides core JWT classes and interfaces for creating and parsing tokens.
2. jjwt-impl → Contains the actual implementation of the API methods.
3. jjwt-jackson → Adds support for JSON serialization and deserialization using Jackson.

All three dependencies work together — the api defines the functionality, the impl performs it, and the jackson module handles JSON conversion internally.

---

Step 3: Build and Refresh

After adding these dependencies:

• Save the pom.xml
• Run Maven → Reload Project (in IntelliJ or VS Code)
• Maven will download the libraries automatically

Now your project is ready to generate, sign, and validate JWT tokens using the JJWT library.

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