[DBW]js获取当前时间(昨天今天明天)

Posted 2020-08-21 未将对象引用设置到对象的实例

1. 开发过程中某些前台页面的时间控件我们需要给默认当前时间，jquery可以轻松的帮我们实现，代码如下
   
   

    1 //昨天的时间
    2 var day1 = new Date();
    3 day1.setTime(day1.getTime()-24*60*60*1000);
    4 var s1 = day1.getFullYear()+"-" + (day1.getMonth()+1) + "-" + day1.getDate();
    5 //今天的时间
    6 var day2 = new Date();
    7 day2.setTime(day2.getTime());
    8 var s2 = day2.getFullYear()+"-" + (day2.getMonth()+1) + "-" + day2.getDate();
    9 //明天的时间
   10 var day3 = new Date();
   11 day3.setTime(day3.getTime()+24*60*60*1000);
   12 var s3 = day3.getFullYear()+"-" + (day3.getMonth()+1) + "-" + day3.getDate();
   13 //拼接时间
   14 function show(){
   15      var str = "" + s1 + "至" + s2;
   16      return str;
   17 }
   18 //赋值doubleDate
   19  $(\'#dateS\').val(show());        

   

    

2. 下面是具体到时分秒的获取方法
   
   

    1 function writeCurrentDate() {
    2         var now = new Date();
    3         var year = now.getFullYear(); //得到年份
    4         var month = now.getMonth();//得到月份
    5         var date = now.getDate();//得到日期
    6         var day = now.getDay();//得到周几
    7         var hour = now.getHours();//得到小时
    8         var minu = now.getMinutes();//得到分钟
    9         var sec = now.getSeconds();//得到秒
   10 　　     var MS = now.getMilliseconds();//获取毫秒
   11         var week;
   12         month = month + 1;
   13         if (month < 10) month = "0" + month;
   14         if (date < 10) date = "0" + date;
   15         if (hour < 10) hour = "0" + hour;
   16         if (minu < 10) minu = "0" + minu;
   17         if (sec < 10) sec = "0" + sec;
   18         if （MS < 100）MS = "0" + MS;
   19         var arr_week = new Array("星期日", "星期一", "星期二", "星期三", "星期四", "星期五", "星期六");
   20         week = arr_week[day];
   21         var time = "";
   22         time = year + "年" + month + "月" + date + "日" + " " + hour + ":" + minu + ":" + sec + " " + week;
   23         //当前日期赋值给当前日期输入框中（jQuery easyUI）
   24         $("#currentDate").html(time);
   25         //设置得到当前日期的函数的执行间隔时间，每1000毫秒刷新一次。
   26         var timer = setTimeout("writeCurrentDate()", 1000);
   27       }

   

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