2.5. 为声明签名并加密嵌套的 JWT 令牌

import io.smallrye.jwt.build.Jwt;
...

// Sign the claims and encrypt the nested token using the private and public keys loaded from the locations
// specified by the 'smallrye.jwt.sign.key.location' and 'smallrye.jwt.encrypt.key.location' properties, respectively.
// The signature algorithm is RS256, and the key encryption algorithm is RSA-OAEP-256.
String jwt = Jwt.claims("/tokenClaims.json").innerSign().encrypt();