import com.nimbusds.oauth2.sdk.TokenResponse; //导入依赖的package包/类
@Override
public TokenResponseAttributes exchange(
    AuthorizationCodeAuthenticationToken authorizationCodeAuthenticationToken)
    throws OAuth2AuthenticationException {

    ClientRegistration clientRegistration = authorizationCodeAuthenticationToken.getClientRegistration();

    AuthorizationCode authorizationCode = new AuthorizationCode(
        authorizationCodeAuthenticationToken.getAuthorizationCode());
    AuthorizationGrant authorizationCodeGrant = new AuthorizationCodeGrant(
        authorizationCode, URI.create(clientRegistration.getRedirectUri()));
    URI tokenUri = URI.create(clientRegistration.getProviderDetails().getTokenUri());

    ClientID clientId = new ClientID(clientRegistration.getClientId());
    Secret clientSecret = new Secret(clientRegistration.getClientSecret());
    ClientAuthentication clientAuthentication = new ClientSecretGet(clientId, clientSecret);

    try {
        HTTPRequest httpRequest = createTokenRequest(
                clientRegistration, authorizationCodeGrant,
                tokenUri, clientAuthentication);

        TokenResponse tokenResponse = TokenResponse.parse(httpRequest.send());

        if (!tokenResponse.indicatesSuccess()) {
            OAuth2Error errorObject = new OAuth2Error("invalid_token_response");
            throw new OAuth2AuthenticationException(errorObject, "error");
        }

        return createTokenResponse((AccessTokenResponse) tokenResponse);

    } catch (MalformedURLException e) {
        throw new SerializeException(e.getMessage(), e);
    } catch (ParseException pe) {
        throw new OAuth2AuthenticationException(new OAuth2Error("invalid_token_response"), pe);
    } catch (IOException ioe) {
        throw new AuthenticationServiceException(
            "An error occurred while sending the Access Token Request: " +
            ioe.getMessage(), ioe);
    }

}
 

import com.nimbusds.oauth2.sdk.TokenResponse; //导入依赖的package包/类
protected OIDCTokenResponse fetchToken(AuthorizationCode authCode, HttpServerExchange exchange) throws Exception {
	URI redirectURI = new URI(RedirectBuilder.redirect(exchange, redirectPath));
	TokenRequest tokenReq = new TokenRequest(oidcProvider.getTokenURI(), oidcProvider.getClientId(), new AuthorizationCodeGrant(authCode, redirectURI));
	HTTPResponse tokenHTTPResp = tokenReq.toHTTPRequest().send();
	TokenResponse tokenResponse = OIDCTokenResponseParser.parse(tokenHTTPResp);
	if (tokenResponse instanceof TokenErrorResponse) {
		ErrorObject error = ((TokenErrorResponse) tokenResponse).getErrorObject();
		throw new IllegalStateException(String.format("OIDC TokenRequest error: code %s description: %s", error.getCode(), error.getDescription()));
	}
	return (OIDCTokenResponse) tokenResponse;
}