{
  "alg": "RS256",
  "typ": "JWT",
  "kid": "myoidc-keyid"
}.{
  "sub": "admin",
  "user_name": "admin",
  "scope": [
    "server"
  ],
  "iss": "http://localhost:3000/",
  "exp": 1617805722,
  "iat": 1617762522,
  "authorities": [

/**
	 * 自定义token扩展链
	 *
	 * @return tokenEnhancerChain
	 */
	@Bean
	public TokenEnhancerChain tokenEnhancerChain() throws Exception {
		TokenEnhancerChain tokenEnhancerChain = new TokenEnhancerChain();
		tokenEnhancerChain.setTokenEnhancers(Arrays.asList(new CustomTokenEnhancer(), accessTokenConverter()));
		return tokenEnhancerChain;
	}


	@Override
	public void configure(AuthorizationServerEndpointsConfigurer endpoints) throws Exception {
		endpoints
				.allowedTokenEndpointRequestMethods(HttpMethod.GET, HttpMethod.POST)
				.tokenStore(tokenStore())
				.accessTokenConverter(accessTokenConverter())
				.tokenEnhancer(tokenEnhancerChain())  //这里执行上面的enhance方法

@Override
    public OAuth2AccessToken enhance(OAuth2AccessToken accessToken, OAuth2Authentication authentication) {
        OAuth2AccessToken enhanceToken = super.enhance(accessToken, authentication);

        //if have openid, add id_token
        if (authentication.getOAuth2Request().getScope().contains(OIDCUtils.SCOPE_OPENID)) {
            ImmutableMap<String, String> extHeader = ImmutableMap.of(
                    KEY_ID, publicJsonWebKey.getKeyId());
            String idToken = encodeWithHeader(accessToken, authentication, extHeader);
            enhanceToken.getAdditionalInformation().put(ID_TOKEN, idToken);
            if (LOG.isDebugEnabled()) {
                LOG.debug("{}|Added id_token: {} to accessToken: {}", WebUtils.getIp(), idToken, enhanceToken);
            }
        }

        return enhanceToken;
    }