js中new date yyyy-mm-dd HH:mm:ss

在JavaScript中，使用`new Date()`来创建一个新的日期对象。要将日期格式化为`yyyy-mm-dd HH:mm:ss`的格式，可以使用以下方法之一：

方法一:

let date = new Date();
let year = date.getFullYear();
let month = String(date.getMonth() + 1).padStart(2, '0');
let day = String(date.getDate()).padStart(2, '0');
let hours = String(date.getHours()).padStart(2, '0');
let minutes = String(date.getMinutes()).padStart(2, '0');
let seconds = String(date.getSeconds()).padStart(2, '0');

let formattedDate = `${year}-${month}-${day} ${hours}:${minutes}:${seconds}`;

方法二:

let date = new Date();
let options = { year: 'numeric', month: '2-digit', day: '2-digit', hour: '2-digit', minute: '2-digit', second: '2-digit' };
let formattedDate = date.toLocaleString('en-US', options);

无论使用哪种方法，`formattedDate`将包含当前日期和时间的`yyyy-mm-dd HH:mm:ss`格式的字符串。

注意：上述代码中的`date`对象将获取当前日期和时间。如果你有特定的日期和时间，可以将其替换为你想要格式化的日期对象。<span class="em">1</span><span class="em">2</span><span class="em">3</span>
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