日期格式化：new Date() 日期格式处理 

  1 <!DOCTYPE html>
  2 <html lang="en">
  3   <head>
  4     <meta charset="UTF-8" />
  5     <meta name="viewport" content="width=device-width, initial-scale=1.0" />
  6     <title>new Date() 日期格式处理</title>
  7   </head>
  8   <body>
  9     <script>
 10       var myDate = new Date();
 11 
 12       var y = myDate.getYear();
 13       console.log("年份", y);
 14       var fullYear = myDate.getFullYear();
 15       console.log("完整年份", fullYear);
 16       var m = myDate.getMonth() + 1;
 17       console.log("月份", m);
 18       var d = myDate.getDate();
 19       console.log("日期", d);
 20       var day = myDate.getDay();
 21       console.log("星期", day);
 22       var time = myDate.getTime();
 23       console.log("获取当前时间(从1970.1.1开始的毫秒数)", time);
 24       var h = myDate.getHours();
 25       console.log("获取当前小时数(0-23)", h);
 26       var min = myDate.getMinutes();
 27       console.log("获取当前分钟数(0-59) ", min);
 28       var sec = myDate.getSeconds();
 29       console.log("获取当前秒数(0-59):", sec);
 30       var haosec = myDate.getMilliseconds();
 31       console.log("获取当前毫秒数(0-999)", haosec);
 32       var riqi = myDate.toLocaleDateString();
 33       console.log("获取当前日期 ", riqi);
 34       var mytime = myDate.toLocaleTimeString();
 35       console.log("获取当前时间", mytime);
 36       var dt = myDate.toLocaleString();
 37       console.log("获取当前日期和时间", dt);
 38     </script>
 39     <script>
 40       //JS获取当前时间戳的方法-JavaScript 获取当前毫秒时间戳有以下三种方法：
 41       var timestamp = Date.parse(new Date()); //不推荐
 42       console.log(timestamp);
 43 
 44       var timestamp2 = new Date().valueOf();
 45       console.log(timestamp2);
 46 
 47       var timestamp3 = new Date().getTime();
 48       console.log(timestamp3);
 49 
 50       var ti = new Date();
 51       console.log(ti); // Mon Nov 23 2020 15:17:09 GMT+0800 (中国标准时间)
 52     </script>
 53     <script>
 54       var strTime = "2011-11-23";
 55       var da = strTime.replace(/-/g, "/");
 56       console.log(da); //2011/11/23
 57       var date = new Date(Date.parse(strTime.replace(/-/g, "/")));
 58       console.log("字符串日期格式:", date);
 59     </script>
 60 
 61     <script>
 62       function add0(m) {
 63         return m < 10 ? "0" + m : m;
 64       }
 65       function format(shijianchuo) {
 66         //shijianchuo是整数，否则要parseInt转换
 67         var time = new Date(shijianchuo);
 68         var y = time.getFullYear();
 69         var m = time.getMonth() + 1;
 70         var d = time.getDate();
 71         var h = time.getHours();
 72         var mm = time.getMinutes();
 73         var s = time.getSeconds();
 74         return (
 75           y +
 76           "-" +
 77           add0(m) +
 78           "-" +
 79           add0(d) +
 80           " " +
 81           add0(h) +
 82           ":" +
 83           add0(mm) +
 84           ":" +
 85           add0(s)
 86         );
 87       }
 88       console.log("时间戳转为日期格式1:", format(1606118452913)); //2020-11-23 16:00:52
 89 
 90       var oldTime = new Date("2015/06/23 08:00:20").getTime() / 1000;
 91       var oldTime2 = new Date("1997/01/01 08:00:20").getTime() / 1000;
 92       console.log("时间戳转为日期格式2", oldTime); //1435017620
 93       console.log("时间戳转为日期格式2", oldTime2); //852076820
 94     </script>
 95 
 96     <script>
 97       var parserDate = function (date) {
 98         var t = Date.parse(date);
 99         if (!isNaN(t)) {
100           return new Date(Date.parse(date.replace(/-/g, "/")));
101         } else {
102           return new Date();
103         }
104       };
105       console.log(
106         "如何将2015-03-12 12:00 转换成标准时间:",
107         parserDate("2015-03-19 12:00:00")
108       );
109 
110       var time1 = "2016-01-01 17:22:37";
111       var date = new Date(time1.replace(/-/g, "/")); //开始时间
112       var time2 = date.getTime();
113       console.log("时间格式字符串转为时间戳（毫秒）:", time2);
114     </script>
115   </body>
116 </html>

 

posted @ 2020-11-23 16:20  这是一个寂寞的天  阅读(3064)  评论(1)    收藏  举报