关于js接收后台时间戳转换成时间问题

后台回传数据  work[name:"...",id:"...",checkdata:"2017-7-28".....]经过toJSONString后checkdata变成了4141415765415(时间戳)

        List<Work> works=this.workBiz.findWork(classid, semester, checkDate,page,rows);        int total=workBiz.findworknum(classid,null,null,null);    Map<String,Object> map=new HashMap<String,Object>();        map.put("rows", works);        map.put("total", total);        jsonStr=JSON.toJSONString(map);

前台js代码

datagrid=$("#show_find_checkwork").datagrid({          url:"/Examination2.0/work_findWorkresult.action",//加载的URL          pagination:true,//显示分页          pageSize:10,//分页大小          pageList:[5,10,15,20],//每页的个数          fit:true,//自动补全          toolbar : '#find_table_slelct',        fitColumns:true,          queryParams : {            examineeclassid:classname,            chackdate:checkDate,            semester:semester,            editionid:editionid,            subjectid:subjectid,            chapterid:chapterid,        },        iconCls:"icon-save",//图标          columns:[[      //每个列具体内容                          {                              field:'wid',                              title:'编号',                              width:50,                          },                             {field:'wname',title:'作业名',align :'center',width:100},                             {field:'checkdate',title:'检查时间',align : 'center',width:100,                            formatter : function(value, row, index) {                                return change(row.checkdate)                            }},                         {field:'description',title:'作业描述',align : 'center',width:200},                        {field:'remark',title:'备注',align : 'center',width:100} ,                        {field:'result',title:'操作',align : 'center',width:100,                            formatter : function(value, row, index) {                                if(row.result!=null&&row.result!=""&&row.result!=undefined){                                    return '<a href=\"changefindwork.jsp?wid='+row.wid+'">查看</a>';                                }else{                                    return '<label>未检查</label>';                                }                            }}                         ]]      }) 

将时间戳转换成data并用正则表达式去掉无用数据

function change(data) {        var birthday = new Date(data);        var time=birthday.toLocaleString()        //"2017/7/28 上午 12:12:12"        time=time.replace(/上午(\w|:)*/,"");        //"2017/7/28 "        //time=time.replace(/\s$/,"");        return time;}