再一次就像推文的情况一样，你没有将数据加载到'用户'对象。而不是：

Once again, just like in the case with tweets, you're not loading data to 'user' object. Instead of:

user = tweet.new User();

你应该使用：

user = tweet.getUser();

您的推文类中也缺少以下内容：

You're also missing the following in your Tweet class:

@JsonProperty("user")
private User user;
public User getUser() { return user; }

我不知道你是如何生成你的Tweets.java文件的，但它没有'似乎是完整的。考虑使用 http://www.jsonschema2pojo.org/ 重新生成它。

I don't know how you've generated your Tweets.java file, but it doesn't seem to be complete. Consider using http://www.jsonschema2pojo.org/ to re-generate it.