java-jwt 使用小结

<dependency>
    <groupId>com.auth0</groupId>
    <artifactId>java-jwt</artifactId>
    <version>4.4.0</version> <!-- 请根据需要选择最新版本 -->
</dependency>

implementation 'com.auth0:java-jwt:4.4.0' // 请根据需要选择最新版本

import com.auth0.jwt.JWT;
import com.auth0.jwt.algorithms.Algorithm;

public class JwtExample {
    public static void main(String[] args) {
        Algorithm algorithm = Algorithm.HMAC256("your-secret-key"); // 使用 HMAC256 算法和密钥
        String token = JWT.create()
                .withIssuer("auth0") // 设置发行者
                .withSubject("user123") // 设置主题（用户标识）
                .withClaim("role", "admin") // 自定义声明
                .sign(algorithm); // 签名

        System.out.println("Generated Token: " + token);
    }
}

import com.auth0.jwt.JWT;
import com.auth0.jwt.algorithms.Algorithm;
import com.auth0.jwt.exceptions.JWTVerificationException;
import com.auth0.jwt.interfaces.DecodedJWT;
import com.auth0.jwt.interfaces.JWTVerifier;

public class JwtVerifyExample {
    public static void main(String[] args) {
        String token = "your-jwt-token"; // 替换为实际的 JWT
        try {
            Algorithm algorithm = Algorithm.HMAC256("your-secret-key");
            JWTVerifier verifier = JWT.require(algorithm)
                    .withIssuer("auth0") // 验证发行者
                    .build();
            DecodedJWT jwt = verifier.verify(token); // 验证并解码
            System.out.println("Token is valid!");
            System.out.println("Subject: " + jwt.getSubject());
            System.out.println("Role: " + jwt.getClaim("role").asString());
        } catch (JWTVerificationException exception) {
            System.err.println("Invalid Token: " + exception.getMessage());
        }
    }
}