2.3. 为声明签名

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

// Sign the claims using an RSA private key loaded from the location specified by the 'smallrye.jwt.sign.key.location' property.
// No 'jws()' transition is required. The default algorithm is RS256.
String jwt1 = Jwt.claims("/tokenClaims.json").sign();

// Set the headers and sign the claims by using an RSA private key loaded in the code (the implementation of this method is omitted).
// Includes a 'jws()' transition to a 'JwtSignatureBuilder'. The default algorithm is RS256.

String jwt2 = Jwt.claims("/tokenClaims.json")
                 .jws()
                 .keyId("kid1")
                 .header("custom-header", "custom-value")
                 .sign(getPrivateKey());

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

// Sign the claims using an RSA private key loaded from the location set with a 'smallrye.jwt.sign.key.location' property. The algorithm is PS256.
String jwt = Jwt.upn("Alice").jws().algorithm(SignatureAlgorithm.PS256).sign();

smallrye.jwt.new-token.signature-algorithm=PS256

import io.smallrye.jwt.build.Jwt;

// Sign the claims using an RSA private key loaded from the location set with a 'smallrye.jwt.sign.key.location' property. The algorithm is PS256.
String jwt = Jwt.upn("Alice").sign();