楼主还是直接使用twitter4j吧，你遇到的问题是因为验证方式不正确，你使用的是Application Only Auth而该接口需要的是User Auth。

示例

ConfigurationBuilder cb = new ConfigurationBuilder();
cb.setDebugEnabled(true)
        .setOAuthConsumerKey("*")
        .setOAuthConsumerSecret("*")
        .setOAuthAccessToken("*")
        .setOAuthAccessTokenSecret("*");

Twitter twitter = new TwitterFactory(cb.build()).getInstance();
User user = twitter.verifyCredentials();
List<Status> statuses = twitter.getMentionsTimeline();
System.out.println("Showing @" + user.getScreenName() + "'s mentions.");
for (Status status : statuses) {
    System.out.println("@" + status.getUser().getScreenName() + " - " + status.getText());
}

https://github.com/yusuke/twi...