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