Magento Rest Oauth API（签名无效）401

当我尝试从Java中获取Magento的数据时，我收到了Signature无效问题 . 我的代码出了什么问题：

public class MagentoFacade {

final String MAGENTO_API_KEY = "apikey";
final String MAGENTO_API_SECRET = "apisecret";
final String MAGENTO_REST_API_URL = "urlmagento/api/rest";

public void testMethod() {

    OAuthService service = new ServiceBuilder()
    .provider(MagentoThreeLeggedOAuth.class)
    .apiKey(MAGENTO_API_KEY)
    .apiSecret(MAGENTO_API_SECRET)
    .debug()
    .build();




    System.out.println("" + service.getVersion());

    // start
            Scanner in = new Scanner(System.in);
            System.out.println("Magento's OAuth Workflow");
            System.out.println();
            // Obtain the Request Token
            System.out.println("Fetching the Request Token...");
            Token requestToken = service.getRequestToken();
            System.out.println("Got the Request Token!");
            System.out.println();

             // Obtain the Authorization URL
            System.out.println("Fetching the Authorization URL...");
            String authorizationUrl = service.getAuthorizationUrl(requestToken);
            System.out.println("Got the Authorization URL!");
            System.out.println("Now go and authorize Main here:");
            System.out.println(authorizationUrl);
            System.out.println("And paste the authorization code here");
            System.out.print(">>");
            Verifier verifier = new Verifier(in.nextLine());
            System.out.println();

            System.out.println("Trading the Request Token for an Access Token...");
            Token accessToken = service.getAccessToken(requestToken, verifier);
            System.out.println("Got the Access Token!");
            System.out.println("(if your curious it looks like this: "
                    + accessToken + " )");
            System.out.println();

             OAuthRequest request = new OAuthRequest(Verb.GET, MAGENTO_REST_API_URL+ "/products?limit=2");
                service.signRequest(accessToken, request);
                Response response = request.send();
                System.out.println();
                System.out.println(response.getCode());
                System.out.println(response.getBody());
                        System.out.println();
}


public static void main(String[] args) {
    MagentoFacade mf = new MagentoFacade();
    mf.testMethod();
}

}

public final class MagentoThreeLeggedOAuth extends DefaultApi10a {
private static final String BASE_URL = "urltoMagento/";

@Override
public String getRequestTokenEndpoint() {
    return BASE_URL + "oauth/initiate";
}

@Override
public String getAccessTokenEndpoint() {
    return BASE_URL + "oauth/token";
}

@Override
public String getAuthorizationUrl(Token requestToken) {
    return BASE_URL + "richard/oauth_authorize?oauth_token="
            + requestToken.getToken(); //this implementation is for admin roles only...
}

}

签名是：NnRaB73FqCcFAAVB4evZtGkWE3k =所附额外的OAuth参数：{oauth_callback - > OOB，oauth_signature - > NnRaB73FqCcFAAVB4evZtGkWE3k =，oauth_version - > 1.0，oauth_nonce - > 753236685，oauth_signature_method - > HMAC-SHA1，oauth_consumer_key - > ptrij1xt8tjisjb6kmdqed2v4rpla8av，oauth_timestamp - > 1359710704}使用Http Header签名发送请求...响应状态码：401响应正文：oauth_problem = signature_invalid＆debug_sbs = MCe / RB8 / GNuqV0qku00ubepc / Sc =线程“main”中的异常org.scribe.exceptions.OAuthException：响应正文不正确 . 无法从中提取令牌和秘密：org.scribe.extractors.TokenExtractorImpl中的'oauth_problem = signature_invalid＆debug_sbs = MCe / RB8 / GNuqV0qku00ubepc / Sc ='at org.scribe.extractors.TokenExtractorImpl.extract（TokenExtractorImpl.java:41） . 在magento.MagentoFacade.main的magento.MagentoFacade.testMethod（MagentoFacade.java:39）的org.scribe.oauth.OAuth10aServiceImpl.getRequestToken（OAuth10aServiceImpl.java:52）中提取（TokenExtractorImpl.java:27）（MagentoFacade.java:73 ）