java解析jwt中的payload的用法

<dependency>
    <groupId>io.jsonwebtoken</groupId>
    <artifactId>jjwt-api</artifactId>
    <version>0.9.1</version>
</dependency>
<dependency>
    <groupId>io.jsonwebtoken</groupId>
    <artifactId>jjwt-impl</artifactId>
    <version>0.9.1</version>
</dependency>

import io.jsonwebtoken.Claims;
import io.jsonwebtoken.Jwts;

public class JwtParser {
    public static void main(String[] args) {
        String jwtToken = "eyJhbGciOiJIUzI1NiJ9.eyJzdWIiOiIxMjM0NTY2Nzg5MCIsImFkbWluIjp0cnVlLCJleHAiOjE2MDAwMDAezCuBf3DqQ";
        String secretKey = "your-secret-key"; // 用于签名验证的密钥

        try {
            Claims claims = Jwts.parser()
                    .setSigningKey(secretKey) // 设置签名密钥
                    .parseClaimsJws(jwtToken)
                    .getBody();

            System.out.println("Subject: " + claims.getSubject());
            System.out.println("Admin: " + claims.getBoolean("admin"));
            System.out.println("Expiration: " + claims.getExpiration());

        } catch (Exception e) {
            System.out.println("Invalid JWT token");
            e.printStackTrace();
        }
    }
}

<dependency>
    <groupId>com.nimbusds</groupId>
    <artifactId>nimbus-jose-jwt</artifactId>
    <version>9.24.2</version>
</dependency>

import com.nimbusds.jose.JOSEException;
import com.nimbusds.jwt.JWTClaimsSet;
import com.nimbusds.jwt.SignedJWT;

public class JwtParser {
    public static void main(String[] args) {
        String jwtToken = "eyJhbGciOiJIUzI1NiJ9.eyJzdWIiOiIxMjM0NTY2Nzg5MCIsImFkbWluIjp0cnVlLCJleHAiOjE2MDAwMDAezCuBf3DqQ";
        String secretKey = "your-secret-key"; // 用于签名验证的密钥

        try {
            SignedJWT signedJWT = SignedJWT.parse(jwtToken);
            JWTClaimsSet claimsSet = signedJWT.getJWTClaimsSet();

            System.out.println("Subject: " + claimsSet.getSubject());
            System.out.println("Admin: " + claimsSet.getBooleanClaim("admin"));
            System.out.println("Expiration: " + claimsSet.getExpiryTime());

        } catch (JOSEException e) {
            System.out.println("Invalid JWT token");
            e.printStackTrace();
        }
    }
}

import java.util.Base64;

public class JwtParser {
    public static void main(String[] args) {
        String jwtToken = "eyJhbGciOiJIUzI1NiJ9.eyJzdWIiOiIxMjM0NTY2Nzg5MCIsImFkbWluIjp0cnVlLCJleHAiOjE2MDAwMDAezCuBf3DqQ";
        String[] parts = jwtToken.split("\\.");
        String payloadBase64 = parts[1];

        // 解码 Base64
        byte[] decodedBytes = Base64.getDecoder().decode(payloadBase64);
        String payload = new String(decodedBytes);

        System.out.println("Payload: " + payload);
    }
}