Flex applications are stateful, that is, they have the capability to remember data persistently for the duration of the user's session in a way that classic web applications usually don't. The content of an application's data can come from many sources；XML files, databases or other server-side resources. Regardless of how data comes to an application, though, a Flex application stores the data in exactly the same way: as a data model.
Creating a data model:
1.use fx:model
转载于:https://www.cnblogs.com/lauraxia/archive/2013/02/16/2913405.html
相关资源：数据结构—成绩单生成器