js 获取系统当前时间
JS获取当前的日期和时间的方法：
var myDate = new Date();
myDate.getYear(); //获取当前年份(2位)
myDate.getFullYear(); //获取完整的年份(4位,1970-????)
myDate.getMonth(); //获取当前月份(0-11,0代表1月)
myDate.getDate(); //获取当前日(1-31)
myDate.getDay(); //获取当前星期X(0-6,0代表星期天)
myDate.getTime(); //获取当前时间(从1970.1.1开始的毫秒数)
myDate.getHours(); //获取当前小时数(0-23)
myDate.getMinutes(); //获取当前分钟数(0-59)
myDate.getSeconds(); //获取当前秒数(0-59)
myDate.getMilliseconds(); //获取当前毫秒数(0-999)
myDate.toLocaleDateString(); //获取当前日期(2015/8/13)
myDate.toLocaleTimeString(); //获取当前时间(下午：12:08:06)
myDate.toLocaleString( ); //获取日期与时间(2015/8/13 下午2:38:03)
日期时间脚本库方法列表:
(1)Date.prototype.isLeapYear 判断闰年
(2)Date.prototype.Format 日期格式化
(3)Date.prototype.DateAdd 日期计算
(4)Date.prototype.DateDiff 比较日期差
(5)Date.prototype.toString 日期转字符串
(6)Date.prototype.toArray 日期分割为数组
(7)Date.prototype.DatePart 取日期的部分信息
(8)Date.prototype.MaxDayOfDate 取日期所在月的最大天数
(9)Date.prototype.WeekNumOfYear 判断日期所在年的第几周
(10)StringToDate 字符串转日期型
(11)IsValidDate 验证日期有效性
(12)CheckDateTime 完整日期时间检查
(13)daysBetween 日期天数差
(1)判断闰年
1 Date.prototype.isLeapYear = function() 2 { 3 return (0==this.getYear()%4&&((this.getYear()%100!=0)||(this.getYear()%400==0))); 4 }
(2)日期格式化
格式 YYYY/yyyy/YY/yy 表示年份
MM/M 月份
W/w 星期
dd/DD/d/D 日期
hh/HH/h/H 时间
mm/m 分钟
ss/SS/s/S 秒
1 Date.prototype.Format = function(formatStr) 2 { 3 var str = formatStr; 4 var Week = ['日','一','二','三','四','五','六']; 5 6 str=str.replace(/yyyy|YYYY/,this.getFullYear()); 7 str=str.replace(/yy|YY/,(this.getYear() % 100)>9?(this.getYear() % 100).toString():'0' + (this.getYear() % 100)); 8 9 str=str.replace(/MM/,this.getMonth()>9?this.getMonth().toString():'0' + this.getMonth()); 10 str=str.replace(/M/g,this.getMonth()); 11 12 str=str.replace(/w|W/g,Week[this.getDay()]); 13 14 str=str.replace(/dd|DD/,this.getDate()>9?this.getDate().toString():'0' + this.getDate()); 15 str=str.replace(/d|D/g,this.getDate()); 16 17 str=str.replace(/hh|HH/,this.getHours()>9?this.getHours().toString():'0' + this.getHours()); 18 str=str.replace(/h|H/g,this.getHours()); 19 str=str.replace(/mm/,this.getMinutes()>9?this.getMinutes().toString():'0' + this.getMinutes()); 20 str=str.replace(/m/g,this.getMinutes()); 21 22 str=str.replace(/ss|SS/,this.getSeconds()>9?this.getSeconds().toString():'0' + this.getSeconds()); 23 str=str.replace(/s|S/g,this.getSeconds()); 24 25 return str; 26 }
(3)求两个时间的天数差 日期格式为 YYYY-MM-dd
1 function daysBetween(DateOne,DateTwo) 2 { 3 var OneMonth = DateOne.substring(5,DateOne.lastIndexOf ('-')); 4 var OneDay = DateOne.substring(DateOne.length,DateOne.lastIndexOf ('-')+1); 5 var OneYear = DateOne.substring(0,DateOne.indexOf ('-')); 6 7 var TwoMonth = DateTwo.substring(5,DateTwo.lastIndexOf ('-')); 8 var TwoDay = DateTwo.substring(DateTwo.length,DateTwo.lastIndexOf ('-')+1); 9 var TwoYear = DateTwo.substring(0,DateTwo.indexOf ('-')); 10 11 var cha=((Date.parse(OneMonth+'/'+OneDay+'/'+OneYear)- Date.parse(TwoMonth+'/'+TwoDay+'/'+TwoYear))/86400000); 12 return Math.abs(cha); 13 }
(4)日期计算
1 Date.prototype.DateAdd = function(strInterval, Number) { 2 var dtTmp = this; 3 switch (strInterval) { 4 case 's' :return new Date(Date.parse(dtTmp) + (1000 * Number)); 5 case 'n' :return new Date(Date.parse(dtTmp) + (60000 * Number)); 6 case 'h' :return new Date(Date.parse(dtTmp) + (3600000 * Number)); 7 case 'd' :return new Date(Date.parse(dtTmp) + (86400000 * Number)); 8 case 'w' :return new Date(Date.parse(dtTmp) + ((86400000 * 7) * Number)); 9 case 'q' :return new Date(dtTmp.getFullYear(), (dtTmp.getMonth()) + Number*3, dtTmp.getDate(), dtTmp.getHours(), dtTmp.getMinutes(), dtTmp.getSeconds()); 10 case 'm' :return new Date(dtTmp.getFullYear(), (dtTmp.getMonth()) + Number, dtTmp.getDate(), dtTmp.getHours(), dtTmp.getMinutes(), dtTmp.getSeconds()); 11 case 'y' :return new Date((dtTmp.getFullYear() + Number), dtTmp.getMonth(), dtTmp.getDate(), dtTmp.getHours(), dtTmp.getMinutes(), dtTmp.getSeconds()); 12 } 13 }
(5)比较日期差 dtEnd 格式为日期型或者有效日期格式字符串
1 Date.prototype.DateDiff = function(strInterval, dtEnd) { 2 var dtStart = this; 3 if (typeof dtEnd == 'string' )//如果是字符串转换为日期型 4 { 5 dtEnd = StringToDate(dtEnd); 6 } 7 switch (strInterval) { 8 case 's' :return parseInt((dtEnd - dtStart) / 1000); 9 case 'n' :return parseInt((dtEnd - dtStart) / 60000); 10 case 'h' :return parseInt((dtEnd - dtStart) / 3600000); 11 case 'd' :return parseInt((dtEnd - dtStart) / 86400000); 12 case 'w' :return parseInt((dtEnd - dtStart) / (86400000 * 7)); 13 case 'm' :return (dtEnd.getMonth()+1)+((dtEnd.getFullYear()-dtStart.getFullYear())*12) - (dtStart.getMonth()+1); 14 case 'y' :return dtEnd.getFullYear() - dtStart.getFullYear(); 15 } 16 }
(6)日期输出字符串，重载了系统的toString方法
1 Date.prototype.toString = function(showWeek) 2 { 3 var myDate= this; 4 var str = myDate.toLocaleDateString(); 5 if (showWeek) 6 { 7 var Week = ['日','一','二','三','四','五','六']; 8 str += ' 星期' + Week[myDate.getDay()]; 9 } 10 return str; 11 }
(7)日期合法性验证
格式为：YYYY-MM-DD或YYYY/MM/DD
1 function IsValidDate(DateStr) 2 { 3 var sDate=DateStr.replace(/(^\s+|\s+$)/g,''); //去两边空格; 4 if(sDate=='') return true; 5 //如果格式满足YYYY-(/)MM-(/)DD或YYYY-(/)M-(/)DD或YYYY-(/)M-(/)D或YYYY-(/)MM-(/)D就替换为'' 6 //数据库中，合法日期可以是:YYYY-MM/DD(2003-3/21),数据库会自动转换为YYYY-MM-DD格式 7 var s = sDate.replace(/[\d]{ 4,4 }[\-/]{ 1 }[\d]{ 1,2 }[\-/]{ 1 }[\d]{ 1,2 }/g,''); 8 if (s=='') //说明格式满足YYYY-MM-DD或YYYY-M-DD或YYYY-M-D或YYYY-MM-D 9 { 10 var t=new Date(sDate.replace(/\-/g,'/')); 11 var ar = sDate.split(/[-/:]/); 12 if(ar[0] != t.getYear() || ar[1] != t.getMonth()+1 || ar[2] != t.getDate()) 13 { 14 //alert('错误的日期格式！格式为：YYYY-MM-DD或YYYY/MM/DD。注意闰年。'); 15 return false; 16 } 17 } 18 else 19 { 20 //alert('错误的日期格式！格式为：YYYY-MM-DD或YYYY/MM/DD。注意闰年。'); 21 return false; 22 } 23 return true; 24 }
(8)日期时间检查
1 function CheckDateTime(str) 2 { 3 var reg = /^(\d+)-(\d{ 1,2 })-(\d{ 1,2 }) (\d{ 1,2 }):(\d{ 1,2 }):(\d{ 1,2 })$/; 4 var r = str.match(reg); 5 if(r==null)return false; 6 r[2]=r[2]-1; 7 var d= new Date(r[1],r[2],r[3],r[4],r[5],r[6]); 8 if(d.getFullYear()!=r[1])return false; 9 if(d.getMonth()!=r[2])return false; 10 if(d.getDate()!=r[3])return false; 11 if(d.getHours()!=r[4])return false; 12 if(d.getMinutes()!=r[5])return false; 13 if(d.getSeconds()!=r[6])return false; 14 return true; 15 }
(9)把日期分割成数组
1 Date.prototype.toArray = function() 2 { 3 var myDate = this; 4 var myArray = Array(); 5 myArray[0] = myDate.getFullYear(); 6 myArray[1] = myDate.getMonth(); 7 myArray[2] = myDate.getDate(); 8 myArray[3] = myDate.getHours(); 9 myArray[4] = myDate.getMinutes(); 10 myArray[5] = myDate.getSeconds(); 11 return myArray; 12 }
(10)取得日期数据信息
参数 interval 表示数据类型
y 年 m月 d日 w星期 ww周 h时 n分 s秒
1 Date.prototype.DatePart = function(interval) 2 { 3 var myDate = this; 4 var partStr=''; 5 var Week = ['日','一','二','三','四','五','六']; 6 switch (interval) 7 { 8 case 'y' :partStr = myDate.getFullYear();break; 9 case 'm' :partStr = myDate.getMonth()+1;break; 10 case 'd' :partStr = myDate.getDate();break; 11 case 'w' :partStr = Week[myDate.getDay()];break; 12 case 'ww' :partStr = myDate.WeekNumOfYear();break; 13 case 'h' :partStr = myDate.getHours();break; 14 case 'n' :partStr = myDate.getMinutes();break; 15 case 's' :partStr = myDate.getSeconds();break; 16 } 17 return partStr; 18 }
(11)取得当前日期所在月的最大天数
1 Date.prototype.MaxDayOfDate = function() 2 { 3 var myDate = this; 4 var ary = myDate.toArray(); 5 var date1 = (new Date(ary[0],ary[1]+1,1)); 6 var date2 = date1.dateAdd(1,'m',1); 7 var result = dateDiff(date1.Format('yyyy-MM-dd'),date2.Format('yyyy-MM-dd')); 8 return result; 9 }
(12)取得当前日期所在周是一年中的第几周
1 Date.prototype.WeekNumOfYear = function() 2 { 3 var myDate = this; 4 var ary = myDate.toArray(); 5 var year = ary[0]; 6 var month = ary[1]+1; 7 var day = ary[2]; 8 document.write('< script language=VBScript\> \n'); 9 document.write('myDate = Datue(''+month+'-'+day+'-'+year+'') \n'); 10 document.write('result = DatePart('ww', myDate) \n'); 11 document.write(' \n'); 12 return result; 13 }
(13)字符串转成日期类型
格式 MM/dd/YYYY MM-dd-YYYY YYYY/MM/dd YYYY-MM-dd
1 function StringToDate(DateStr) 2 { 3 4 var converted = Date.parse(DateStr); 5 var myDate = new Date(converted); 6 if (isNaN(myDate)) 7 { 8 //var delimCahar = DateStr.indexOf('/')!=-1?'/':'-'; 9 var arys= DateStr.split('-'); 10 myDate = new Date(arys[0],--arys[1],arys[2]); 11 } 12 return myDate; 13 }
若要显示:当前日期加时间(如:2009-06-12 12:00)
1 function CurentTime() 2 { 3 var now = new Date(); 4 5 var year = now.getFullYear(); //年 6 var month = now.getMonth() + 1; //月 7 var day = now.getDate(); //日 8 9 var hh = now.getHours(); //时 10 var mm = now.getMinutes(); //分 11 12 var clock = year + "-"; 13 14 if(month < 10) 15 clock += "0"; 16 17 clock += month + "-"; 18 19 if(day < 10) 20 clock += "0"; 21 22 clock += day + " "; 23 24 if(hh < 10) 25 clock += "0"; 26 27 clock += hh + ":"; 28 if (mm < 10) clock += '0'; 29 clock += mm; 30 return(clock); 31 }
