Detailed explanation of conversion methods between js timestamp and date format

This article mainly introduces the conversion between js timestamp and date format in detail. It has certain reference value. Interested friends can refer to it. I hope it can help everyone.

1. Convert timestamp to date format

// 简单的一句代码
var date = new Date(时间戳); //获取一个时间对象

/**
 1. 下面是获取时间日期的方法，需要什么样的格式自己拼接起来就好了
 2. 更多好用的方法可以在这查到 -> http://www.w3school.com.cn/jsref/jsref_obj_date.asp
 */
date.getFullYear(); // 获取完整的年份(4位,1970)
date.getMonth(); // 获取月份(0-11,0代表1月,用的时候记得加上1)
date.getDate(); // 获取日(1-31)
date.getTime(); // 获取时间(从1970.1.1开始的毫秒数)
date.getHours(); // 获取小时数(0-23)
date.getMinutes(); // 获取分钟数(0-59)
date.getSeconds(); // 获取秒数(0-59)

Example

// 比如需要这样的格式 yyyy-MM-dd hh:mm:ss
var date = new Date(1398250549490);
Y = date.getFullYear() + '-';
M = (date.getMonth()+1 < 10 ? &#39;0&#39;+(date.getMonth()+1) : date.getMonth()+1) + &#39;-&#39;;
D = date.getDate() + &#39; &#39;;
h = date.getHours() + &#39;:&#39;;
m = date.getMinutes() + &#39;:&#39;;
s = date.getSeconds(); 
console.log(Y+M+D+h+m+s); //呀麻碟
// 输出结果：2014-04-23 18:55:49

2. Convert date format into timestamp

// 也很简单
var strtime = '2014-04-23 18:55:49:123';
var date = new Date(strtime); 
//传入一个时间格式，如果不传入就是获取现在的时间了，这样做不兼容火狐。
// 可以这样做
var date = new Date(strtime.replace(/-/g, '/'));

// 有三种方式获取，在后面会讲到三种方式的区别
time1 = date.getTime();
time2 = date.valueOf();
time3 = Date.parse(date);

/* 
三种获取的区别：
第一、第二种：会精确到毫秒
第三种：只能精确到秒，毫秒将用0来代替
比如上面代码输出的结果(一眼就能看出区别)：
1398250549123
1398250549123
1398250549000 
*/

3. Date() parameter form has 7 Kind of

new Date("month dd,yyyy hh:mm:ss");
new Date("month dd,yyyy");
new Date("yyyy/MM/dd hh:mm:ss");
new Date("yyyy/MM/dd");
new Date(yyyy,mth,dd,hh,mm,ss);
new Date(yyyy,mth,dd);
new Date(ms);

For example:

new Date("September 16,2016 14:15:05");
new Date("September 16,2016");
new Date("2016/09/16 14:15:05");
new Date("2016/09/16");
new Date(2016,8,16,14,15,5); // 月份从0～11
new Date(2016,8,16);
new Date(1474006780);

How about everyone learned it? Hurry up and try it yourself.

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