//元素的补零计算
        function addZero(val) {
            if (val < 10) {
                return "0" + val;
            } else {
                return val;
            }
        };


        // console.log(addZero(9))
        //实现vue中的过滤器功能  先定义过滤器 在使用        value是过滤器前面的值，type是过滤器中定义的字段
        Vue.filter("formatTime", function (value, type) { 
            var dataTime = "";
            var data = new Date();
            data.setTime(value);
            var year = data.getFullYear();
            var month = addZero(data.getMonth() + 1);
            var day = addZero(data.getDate());
            var hour = addZero(data.getHours());
            var minute = addZero(data.getMinutes());
            var second = addZero(data.getSeconds());
            if (type == 1) {
                dataTime = year + "-" + month + "-" + day;
            } else if (type == 2) {
                dataTime = year + "-" + month + "-" + day + " " + hour + ":" + minute;
            } else if (type == 3) {
                dataTime = hour + ":" + minute + ":" + second;
            } else if (type == 4) {
                dataTime = year + "-" + month;

            }
            return dataTime; //将格式化后的字符串输出到前端显示

        });

//使用
<span class="info-d">{{1513668232000 | formatTime(2)}}</span>.