bootstrap-table显示数据提示No matching records found

Question

$("#query1").click(function(){

$("#re").bootstrapTable({
    method: 'post',
    url: webPath+"/guest/query1.do",
    dataType: "json",
    sidePagination: "server", 
    contentType: "application/x-www-form-urlencoded; charset=UTF-8",
    columns:[
        {
            filed:'eid',
            title:'EID',
        },{
            field:'eum_id',
            title:'EUM_ID',
        }]
});## 标题文字 ##

});

后台的返回json为{"eid":"89001012012341234012345678901224","eum_id":"1"}