无数据代码为 

<script>

    new Vue({
        el:"#demo",
        data:{list:find()}
    })


   function find(){
     var ss;
        $.ajax({
            type: "post",
            url: "studentaction.action?methodName=findallStudent",
            dataType: "json",
            success: function(msg){
                ss=msg;
                console.log(msg)
            }
        })
       return ss;
    }


</script>

<table id="demo" lay-filter="test">
    <tr v-for="item in list" :key="item.id">
        <td>{{item.name}}</td>
    </tr>
</table>

我们可以看到右下角数据是已经加载出来了的，但是页面上却没有显示

我们至于要加入一行代码   async: false,让ajax先执行即可

 function find(){
     var ss;
        $.ajax({
            type: "post",
            url: "studentaction.action?methodName=findallStudent",
            dataType: "json",
            async: false,//让ajax先执行
            success: function(msg){
                ss=msg;
                console.log(msg)
            }
        })
       return ss;
    }