我尝试遵循JOAuth（基于Java的OAuth1（最终）和OAuth2（草稿10）库）上的说明。如何使用？为了获取Facebook访问令牌，但没有成功。

我做了以下事情：

将这些行添加到WEB-INF / web.xml

<servlet>
  <description>An OAuth Servlet Controller</description>
  <display-name>OAuthServlet</display-name>
  <servlet-name>OAuthServlet</servlet-name>
  <servlet-class>com.neurologic.oauth.servlet.OAuthServlet</servlet-class>
  <init-param>
     <param-name>config</param-name>
     <param-value>/WEB-INF/oauth-config.xml</param-value>
  </init-param>
  <load-on-startup>3</load-on-startup>
 </servlet>
<servlet-mapping>
 <servlet-name>OAuthServlet</servlet-name>
 <url-pattern>/oauth/*</url-pattern>
</servlet-mapping>

创建WEB-INF / OAuth的config.xml中与下面的行：（重命名的应用程序密钥和秘密<APP_KEY>和<APP_SECRET>）

<?xml version="1.0" encoding="UTF-8"?>
<oauth-config>
<oauth name="facebook" version="2">
 <consumer key="<APP_KEY>" secret="<APP_SECRET>" />
 <provider authorizationUrl="https://graph.facebook.com/oauth/authorize" 
   accessTokenUrl="https://graph.facebook.com/oauth/access_token" />
</oauth>

<service path="/oauth_redirect" 
class="com.facebook.FacebookOAuthService" oauth="facebook">
 <success path="/start.jsp" />
</service>
</oauth-config>

我的com.facebook.FacebookOAuthService类（OAuth服务）：

package com.xpogames.facebook;

import java.util.Map;

import javax.servlet.http.HttpServletRequest;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import net.oauth.enums.GrantType;
import net.oauth.exception.OAuthException;
import net.oauth.parameters.OAuth2Parameters;

import com.neurologic.oauth.service.impl.OAuth2Service;
import com.neurologic.oauth.util.Globals;

/**
 * @author The Elite Gentleman
 * @since 05 December 2010
 *
 */
public class FacebookOAuthService extends OAuth2Service {


 private static final String REDIRECT_URL = "http://127.0.0.1:5080/Red5FacebookAuth/oauth/oauth_redirect";

     /* (non-Javadoc)
      * @see com.neurologic.oauth.service.impl.OAuth2Service#processReceivedAuthorization(javax.servlet.    http.HttpServletRequest, java.lang.String, java.util.Map)
  */
  @Override
  protected String processReceivedAuthorization(HttpServletRequest request, String code, Map<String, String> additionalParameters) throws OAuthException {
 // TODO Auto-generated method stub

  OAuth2Parameters parameters = new OAuth2Parameters();
  parameters.setCode(code);
  parameters.setRedirectUri(REDIRECT_URL);

  Map<String, String> responseMap = getConsumer().requestAcessToken(GrantType.AUTHORIZATION_CODE, parameters, null, (String[])null);
  if (responseMap == null) {
   //This usually should never been thrown, but we just do anyway....
   throw new OAuthException("No OAuth response retrieved.");
  }

  if (responseMap.containsKey("error")) {
   throwOAuthErrorException(responseMap);
  }

  if (responseMap.containsKey(OAuth2Parameters.ACCESS_TOKEN)) {
   String accessToken = responseMap.remove(OAuth2Parameters.ACCESS_TOKEN);
   request.getSession().setAttribute(Globals.SESSION_OAUTH2_ACCESS_TOKEN, accessToken);
   processAdditionalReceivedAccessTokenParameters(request, responseMap);
  }

  return null;
 }

 /* (non-Javadoc)
  * @see com.neurologic.oauth.service.impl.OAuth2Service#processAdditionalReceivedAccessTokenParamet    ers(javax.servlet.http.HttpServletRequest, java.util.Map)
  */
 @Override
 protected void processAdditionalReceivedAccessTokenParameters(HttpServletRequest request, Map<String, String> additionalParameters) throws OAuthException {
  // TODO Auto-generated method stub

 }   
}

最后是成功转发给用户的start.jsp文件。

<%@page import="com.neurologic.oauth.util.Globals"%>

<% 
String accessToken =     (String)request.getSession().getAttribute(Globals.SESSION_OAUTH2_ACCESS_TOKEN); //For OAuth 2 access token.
%>
<%= accessToken %>

当我尝试通过将浏览器转发到http://127.0.0.1:5080/Red5FacebookAuth/oauth/oauth_redirect对其进行测试时，我得到的输出即null表示该属性不存在

没有错误，但我仍然没有正确的令牌。

我是tomcat和servlet配置的新手，所以我可能错过了一些东西。

我想念什么？

非常感谢！