需要处理的JSON数据中一个数组元素如下，请问如何定义一个类获取它的数据（目的是把获取的数据展示在一个tableview的cell中），我需要获取text，user里的screen name和profile_image_url所指向的图像数据。我遇到的问题是在定义一个这样的类时，user是不是要再定义一个类？在类里不能镶嵌一个类吧？如何定义它才能在后续处理中成功地将数据加载在tableview中？

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    "text": "服务器【星耀银河】国家【燕】 　浮沉江山英雄定，新的征程从五月十七号重新开始，谁将能主宰星耀银河，谁又将是新兴的霸主？  随着一声惊雷，小史降临到了燕国这片热土上，呼吸着新鲜的空……看全文点这 http://t.cn/zHy3fnC",
    "source": "<a href=\"http://app.weibo.com/t/feed/4ZcXia\" rel=\"nofollow\">征途2国史应用</a>",
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