js 时间戳相关代码

//代码摘自前辈博客 文章地址http://blog.csdn.net/qq_30100043/article/details/54586088

// 获取当前时间戳(以s为单位)  
var timestamp = Date.parse(new Date());  
timestamp = timestamp / 1000;  
//当前时间戳为：1403149534  
console.log("当前时间戳为：" + timestamp);  
  
//另一个方法获取当前时间戳  
console.log(+new Date());  
console.log(Number(new Date()));  
  
// 获取某个时间格式的时间戳  
var stringTime = "2014-07-10 10:21:12";  
var timestamp2 = Date.parse(new Date(stringTime));  
timestamp2 = timestamp2 / 1000;  
//2014-07-10 10:21:12的时间戳为：1404958872   
console.log(stringTime + "的时间戳为：" + timestamp2);  
  
// 将当前时间换成时间格式字符串  
var timestamp3 = 1403058804;  
var newDate = new Date();  
newDate.setTime(timestamp3 * 1000);  
// Wed Jun 18 2014   
console.log(newDate.toDateString());  
// Wed, 18 Jun 2014 02:33:24 GMT   
console.log(newDate.toGMTString());  
// 2014-06-18T02:33:24.000Z  
console.log(newDate.toISOString());  
// 2014-06-18T02:33:24.000Z   
console.log(newDate.toJSON());  
// 2014年6月18日   
console.log(newDate.toLocaleDateString());  
// 2014年6月18日 上午10:33:24   
console.log(newDate.toLocaleString());  
// 上午10:33:24   
console.log(newDate.toLocaleTimeString());  
// Wed Jun 18 2014 10:33:24 GMT+0800 (中国标准时间)  
console.log(newDate.toString());  
// 10:33:24 GMT+0800 (中国标准时间)   
console.log(newDate.toTimeString());  
// Wed, 18 Jun 2014 02:33:24 GMT  
console.log(newDate.toUTCString());  
  
Date.prototype.format = function(format) {  
       var date = {  
              "M+": this.getMonth() + 1,  
              "d+": this.getDate(),  
              "h+": this.getHours(),  
              "m+": this.getMinutes(),  
              "s+": this.getSeconds(),  
              "q+": Math.floor((this.getMonth() + 3) / 3),  
              "S+": this.getMilliseconds()  
       };  
       if (/(y+)/i.test(format)) {  
              format = format.replace(RegExp.$1, (this.getFullYear() + '').substr(4 - RegExp.$1.length));  
       }  
       for (var k in date) {  
              if (new RegExp("(" + k + ")").test(format)) {  
                     format = format.replace(RegExp.$1, RegExp.$1.length == 1  
                            ? date[k] : ("00" + date[k]).substr(("" + date[k]).length));  
              }  
       }  
       return format;  
}  
console.log(newDate.format('yyyy-MM-dd h:m:s'));