extjs中 一种处理封装好了的json时间

1.json传过来的时间参数
"HIREDATE":{"date":17,"day":3,"hours":0,"minutes":0,"month":11,"nanos":0,"seconds":0,"time":345830400000,"timezoneOffset":-480,"year":80},"ENAME":"SMITH"}
extjs得到time(秒计算):
[javascript]
flieds:{name : 'HIREDATE', type : 'date', mapping : 'HIREDATE.time', dateFormat : 'time'} 
[javascript] 
//格式化时间类型 
    function formatDate(value){ 
         return value ? value.dateFormat('Y-m-d') : '';  
    } 
作者：without0815