Java 获取accessToken

如果我使用链接，如何获取accessToken：

https://www.facebook.com/login.php?skip_api_login=1&api_key=MY_APP_TOKEN&signed_next=1&next=https://www.facebook.com/dialog/oauth?redirect_uri=http%253A%252F%252Fwww.facebook.com%252Fconnect%252Flogin_success.html&scope=read_stream%252Coffline_access&type=user_agent&client_id=389735501155841&ret=login&cancel_uri=http://www.facebook.com/connect/login_success.html?error=access_denied&error_code=200&error_description=Permissions%2berror&error_reason=user_denied#_=_&display=page

我想用Java获取令牌

//编辑：

String GraphURL1 = "https://www.facebook.com/dialog/oauth?client_id=APPTOKEN&redirect_uri=https%3A%2F%2Fwww.facebook.com%2Fconnect%2Flogin_success.html&response_type=token&display=popup&scope=user_about_me%2Cread_stream%2C%20share_item";
            URL newURL = new URL(GraphURL1);
            HttpsURLConnection https = (HttpsURLConnection)newURL.openConnection();
            https.setRequestMethod("HEAD");
            https.setUseCaches(false);

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//编辑：我已保存token.txt文件。代码如下：

使用以下代码。它将返回所有查询参数的映射

        URL newURL = new URL(GraphURL1);
        HttpsURLConnection https = (HttpsURLConnection) newURL.openConnection();
        https.setRequestMethod("HEAD");
        https.setUseCaches(false);
        String query = newURL.getQuery();

Map<String, String> queryMap = getQueryMap(query );

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使用以下代码。它将返回所有查询参数的映射

        URL newURL = new URL(GraphURL1);
        HttpsURLConnection https = (HttpsURLConnection) newURL.openConnection();
        https.setRequestMethod("HEAD");
        https.setUseCaches(false);
        String query = newURL.getQuery();

Map<String, String> queryMap = getQueryMap(query );

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到目前为止，您尝试了什么？我使用了另一个重定向uri，但这不是我想要的。字符串1=“”；URL newURL=新URL（1）；HttpsURLConnection https=（HttpsURLConnection）newURL.openConnection（）；https.setRequestMethod（“HEAD”）；https.setUseCaches（false）；我有一个问题：Map queryMap=getQueryMap（query）；->查询以红色下划线：/n使用此选项获取查询

String query=newURL.getQuery（）它工作得很好。谢谢但如何将accessToken保存在txt文件中以供测试？PrintWriter spWriter=新的PrintWriter（新的FileWriter（“accessToken.txt”）；spWriter.println（查询）；spWriter.flush（）；File File=新文件（“accessToken.txt”）；我已经测试了你的代码，但我只得到了完整的html代码。如何在文本文件中获取令牌。。。。？