记录工作中用到的日期转换方法

时间戳转换：

　　　　function formatDate(unixtime) {
            var dateTime = new Date(parseInt(unixtime) * 1000)
            var year = dateTime.getFullYear();
            var month = dateTime.getMonth() + 1;
            var day = dateTime.getDate();
            var hour = dateTime.getHours();
            var minute = dateTime.getMinutes();
            var second = dateTime.getSeconds();
            var now = new Date();
            var now_new = Date.parse(now.toDateString());  //typescript转换写法
            var milliseconds = now_new - dateTime;
            var timeSpanStr = year + "年" + month + "月" + day + "日 " + hour + ":" + minute
            return timeSpanStr;
        }