1、拖拽编辑Button组件,输入JSON数据：
[{"title": "ASP.NET網頁程式設計", "author": "陳會安", "category": "Web", "pubdate": "06/2015", "id": "W101"}, {"title": "PHP網頁程式設計", "author": "陳會安", "category": "Web", "pubdate": "07/2015", "id": "W102"}, {"title": "Java程式設計", "author": "陳會安", "category": "Programming", "pubdate": "11/2015", "id": "P102"}, {"title": "Android程式設計", "author": "陳會安", "category": "Mobile", "pubdate": "07/2015", "id": "M102"}]
2、拖拽编辑Text组件，输入数据格式{{msg.payload[0].id}}