求:如何遍历json
求遍历key:articleList的值 ,要代码不要示例，求代码代码
json数据格式如下：

default( 

     {"totalItem" : "4789", "currentPage" : "1" ,"totalPage" : "1" ,  "articleList" :  [ 
{"articleId":"49745457", "authorId":"1057363221", "title":"零瑕疵底妆套装（BB霜+遮瑕膏）裸妆强保湿 专柜正品", "cover":  "http://img.taobaocdn.com/bao/uploaded/i6/T1Aa0aFstcXXb1upjX_210x1000.jpg" , "createTime": "2013-11-17", "abstract": " 点击下图购买", "nick" : "瑞喜商城","authorPhoto" :  "http://a.tbcdn.cn/p/sns/1.0/img/default/avatar-40.png" , "viewCount" : "25", "commentCount" : "0", "talentHome" : "http://koubei.mei.taobao.com/talent/detail.htm?id=1057363221", "articleDetailLink" : "http://koubei.mei.taobao.com/talent/article/personal_article_detail.htm?articleId=49745457&talentID=1057363221&src=2"}  
 , 
{"articleId":"49744742", "authorId":"188114641", "title":"韩范儿自然百搭裸妆", "cover":  "http://img.taobaocdn.com/bao/uploaded/i3/T1SH8hFsxXXXb1upjX_210x1000.jpg" , "createTime": "2013-11-17", "abstract": "这个化妆教程真的是写的我热血澎湃，哈哈 因为真的是有一段日子没出教程了！ 貌似是月初写的~ 阿西这个频率", "nick" : "sp84653285","authorPhoto" :  "http://a.tbcdn.cn/p/sns/1.0/img/default/avatar-40.png" , "viewCount" : "97", "commentCount" : "0", "talentHome" : "http://koubei.mei.taobao.com/talent/detail.htm?id=188114641", "articleDetailLink" : "http://koubei.mei.taobao.com/talent/article/personal_article_detail.htm?articleId=49744742&talentID=188114641&src=2"}  
 , 
{"articleId":"49746065", "authorId":"188114641", "title":"初冬热门平价护手霜大测评", "cover":  "http://img.taobaocdn.com/bao/uploaded/i1/T1HMs8FfNdXXb1upjX_210x1000.jpg" , "createTime": "2013-11-17", "abstract": "女人有三张脸，脸部，颈部，手部，女孩子们都很注重脸部和发型，手部的保养很容易忽略，看上去白净细腻的美", "nick" : "sp84653285","authorPhoto" :  "http://a.tbcdn.cn/p/sns/1.0/img/default/avatar-40.png" , "viewCount" : "16", "commentCount" : "0", "talentHome" : "http://koubei.mei.taobao.com/talent/detail.htm?id=188114641", "articleDetailLink" : "http://koubei.mei.taobao.com/talent/article/personal_article_detail.htm?articleId=49746065&talentID=188114641&src=2"}  
 , 
{"articleId":"49744731", "authorId":"409303609", "title":"冬季嫩白呵护自己的肌肤 身体美白 护手霜篇", "cover":  "http://img.taobaocdn.com/bao/uploaded/i2/T1yOdeFBJXXXb1upjX_210x1000.jpg" , "createTime": "2013-11-17", "abstract": "秋冬气候多变，白天是气候宜人，早晚却会寒冷异常。皮肤容易干燥缺水粗糙。且夏季紫外线造成各种晒黑以及遗", "nick" : "十全十美女子","authorPhoto" :  "http://a.tbcdn.cn/p/sns/1.0/img/default/avatar-40.png" , "viewCount" : "5071", "commentCount" : "2", "talentHome" : "http://koubei.mei.taobao.com/talent/detail.htm?id=409303609", "articleDetailLink" : "http://koubei.mei.taobao.com/talent/article/personal_article_detail.htm?articleId=49744731&talentID=409303609&src=2"}  
 , 
{"articleId":"49745328", "authorId":"724213080", "title":"初学者【教材】彩妆组合套装盘", "cover":  "http://img.taobaocdn.com/bao/uploaded/i3/T1K3Z_Fh0cXXb1upjX_210x1000.jpg" , "createTime": "2013-11-17", "abstract": "点击下图购买", "nick" : "时空商城shikong","authorPhoto" :  "http://a.tbcdn.cn/p/sns/1.0/img/default/avatar-40.png" , "viewCount" :