具体代码

<span id="nnn">

</span>
<script type="text/javascript">
var date = new Date()//定义一个date接收时间

var year = date.getFullYear() //获取年份
var month = date.getMonth() + 1 //获取月份(数据介于0-11之间,所以+1)
var day = date.getDate() //获取天数
var hours = date.getHours() //获取时
var minutes = date.getMinutes() //获取分
var seconds = date.getSeconds() //获取秒

var result = year + "年" + month + "月" + day + "日" + hours + ":" + minutes + ":" + seconds //打印格式
console.log(result)
document.getElementById("nnn").innerHTML = result //将return放在ID为“nnn”的span标签内
</script>