JAVA代码生成与JWT一起使用的HS512密钥

import io.jsonwebtoken.SignatureAlgorithm;
import io.jsonwebtoken.security.Keys;

import javax.crypto.SecretKey;

public class HS512KeyGenerator {
    public static void main(String[] args) {
        SecretKey key = Keys.secretKeyFor(SignatureAlgorithm.HS512);
        byte[] encodedKey = key.getEncoded();
        String base64Key = java.util.Base64.getEncoder().encodeToString(encodedKey);
        System.out.println("HS512密钥：" + base64Key);
    }
}

import io.jsonwebtoken.Claims;
import io.jsonwebtoken.Jwts;
import io.jsonwebtoken.security.Keys;

import javax.crypto.SecretKey;

public class JWTExample {
    public static void main(String[] args) {
        String secretKey = "密钥"; // 替换为实际的密钥

        SecretKey key = Keys.hmacShaKeyFor(secretKey.getBytes());

        String token = Jwts.builder()
                .setSubject("user123")
                .signWith(key)
                .compact();

        Claims claims = Jwts.parserBuilder()
                .setSigningKey(key)
                .build()
                .parseClaimsJws(token)
                .getBody();

        System.out.println("用户名：" + claims.getSubject());
    }
}