json 嵌套机构

var data={
id:0;
totalProperty:2 //数据总量
suceccProperty:true //当前请求是否执行成功，进而判断数据是否加载
root:[
{id;'id1',name:'name1',descn:'descn1'},
{id;'id2',name:'name2',descn:'descn2'}

]};

var reader=new Ext.data.jsonReader({

suceccProperty:"suceccproperty",
totalProperty:"totalProperty",
root:"root",
id:"id"
},[
{name:'id',mapping;'id'}, mapping 名字一致时可忽略，，
{name:'name', mapping:'name'},
{name:'descn', mapping:'descn'}
]);


mapping 进行数据映射
var data={
id:0,
totalProperty:2,
suceccProperty:true,
root:[
{id:'id1',name:'name1',descn:'descn1',person:{
id:1,name:'man',sex:'male'
}},
{id:'id2',name:'name2',descn:'descn2',person:{
id:2,name:'woman',sex:'female'
}}
]
};

var reader=new Ext.data.JsonReader({
successProperty:"successproperty",
totalProperty: "totalProperty"
root:"root",
id:"id"
},[
'id',
'name',
'descn',
{name:'person_name',mapping:'person.name'},
{name:'person_sex',mapping:'person.sex'}
]);

在JsonReader中可以用mapping吧这些嵌套的内部属性映射出来，赋予对应的record，其他字段都不变