import com.nimbusds.jose.proc.JWSKeySelector; //导入依赖的package包/类
private ConfigurableJWTProcessor<SecurityContext> getAadJwtTokenValidator()
        throws MalformedURLException {
    final ConfigurableJWTProcessor<SecurityContext> jwtProcessor = new DefaultJWTProcessor<>();
    final JWKSource<SecurityContext> keySource = new RemoteJWKSet<>(
            new URL(KEY_DISCOVERY_URI));
    final JWSAlgorithm expectedJWSAlg = JWSAlgorithm.RS256;
    final JWSKeySelector<SecurityContext> keySelector = new JWSVerificationKeySelector<>(expectedJWSAlg, keySource);
    jwtProcessor.setJWSKeySelector(keySelector);

    jwtProcessor.setJWTClaimsSetVerifier(new DefaultJWTClaimsVerifier<SecurityContext>() {
        @Override
        public void verify(JWTClaimsSet claimsSet, SecurityContext ctx) throws BadJWTException {
            super.verify(claimsSet, ctx);
            final String issuer = claimsSet.getIssuer();
            if (issuer == null || !issuer.contains("https://sts.windows.net/")) {
                throw new BadJWTException("Invalid token issuer");
            }
        }
    });
    return jwtProcessor;
}
 

import com.nimbusds.jose.proc.JWSKeySelector; //导入依赖的package包/类
@Bean
public ConfigurableJWTProcessor configurableJWTProcessor() throws MalformedURLException {
    ResourceRetriever resourceRetriever = new DefaultResourceRetriever(jwtConfiguration.getConnectionTimeout(), jwtConfiguration.getReadTimeout());
    URL jwkSetURL = new URL(jwtConfiguration.getJwkUrl());
    JWKSource keySource = new RemoteJWKSet(jwkSetURL, resourceRetriever);
    ConfigurableJWTProcessor jwtProcessor = new DefaultJWTProcessor();
    JWSKeySelector keySelector = new JWSVerificationKeySelector(RS256, keySource);
    jwtProcessor.setJWSKeySelector(keySelector);
    return jwtProcessor;
}
 

import com.nimbusds.jose.proc.JWSKeySelector; //导入依赖的package包/类
@PostConstruct
public void init() {
    try {
        JWKSource<SecurityContext> keySource = lookupJWKSource();
        JWSAlgorithm expectedJWSAlg = jwtConfiguration.getAlgorithm();
        JWSKeySelector<SecurityContext> keySelector = new JWSVerificationKeySelector<>(expectedJWSAlg, keySource);
        delegate.setJWSKeySelector(keySelector);
    } catch (IOException | ParseException e) {
        throw new JWTException("Unable to read JWT Configuration",e);
    }
}