js获取日期
常用如下:
var date = new Date();//中国标准时间
var year = date.getFullYear();//获取完整的年份(4位)
var month = date.getMonth();//获取当前月份(0-11,0代表1月)
var nowDate = date.getDate();//获取当前日(1-31)
var day = date.getDay();//获取当前星期X(0-6,0代表星期天)
更多请点击JavaScript 标准库 Date或参考中第一篇。
日期的相关方法
格式化日期
1、yyyy-MM-dd
//格式化日期:yyyy-MM-dd
function formatDate(date) {
var myyear = date.getFullYear();
var mymonth = date.getMonth() + 1;
var myweekday = date.getDate();
if (mymonth < 10) {
mymonth = "0" + mymonth;
}
if (myweekday < 10) {
myweekday = "0" + myweekday;
}
return (myyear + "-" + mymonth + "-" + myweekday);//想要什么格式都可以随便自己拼
}
var date = new Date();
//date
//Mon Jun 25 2018 15:32:38 GMT+0800 (中国标准时间)
formatDate(date);
//"2018-06-25"
或者 js标准时间格式化中@joy钰的回答:
function formatDate(dateArg) {
const date = new Date(dateArg);
const year = date.getFullYear();
const month = date.getMonth() + 1;
const day = date.getDate();
const formatMonth = month < 10 ? `0${month}` : month;
const formatDay = day < 10 ? `0${day}` : day;
return `${year}-${formatMonth}-${formatDay}`
}
2、xx 年 xx 月 xx 日 xx 时 xx 分
//获取当前日期 时间
function todayTime() {
var date = new Date();
var curYear = date.getFullYear();
var curMonth = date.getMonth() + 1;
var curDate = date.getDate();
if(curMonth<10){
curMonth = '0' + curMonth;
}
if(curDate<10){
curDate = '0' + curDate;
}
var curHours = date.getHours();
var curMinutes = date.getMinutes();
var curtime = curYear + ' 年 ' + curMonth + ' 月 ' + curDate +' 日' + curHours + '时 ' + curMinutes + '分 ';
return curtime;
}
3、英文格式日期
//获取当前日期 英文
function todayTimeEn() {
var dt = new Date();
var m = new Array("January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December");
mn = dt.getMonth();
dn = dt.getDate();
if(dn<10){
dn = '0' + dn;
}
var curtime = m[mn] + " " + dn + ", " + dt.getFullYear();
return curtime;
}
周、月 相关的日期方法
1、一周 、本周
//近七天的日期
function setDate() {
var endDate = new Date();
//一天的毫秒数
var millisecond = 1000 * 60 * 60 * 24;
var beginDate = new Date(endDate.getTime() - (7 * millisecond));
$('#beginDate').val(formatDate(beginDate));
$('#endDate').val(formatDate(endDate));
}
//本周日期 (取周一为第一天、周日为最后一天)
function weekDate() {
var date = new Date();
var year = date.getFullYear();
var month = date.getMonth();
var nowDate = date.getDate();
var day = date.getDay();
var beginDate = new Date(year, month, nowDate - day + 1);
var endDate = new Date(year, month, nowDate + (6 - day) + 1);
$('#beginDate').val(formatDate(beginDate));
$('#endDate').val(formatDate(endDate));
}
2、 月
//本月日期
function monthDate() {
var date = new Date();
var year = date.getFullYear();
var month = date.getMonth() + 1;
if (month < 10) {
month = "0" + month;
}
var day = getDaysInOneMonth(year, month);
$('#beginDate').val(year + "-" + month + "-01");
$('#endDate').val(year + "-" + month + "-" + day);
}
//获取某月天数
function getDaysInOneMonth(year, month) {
month = parseInt(month, 10);
var d = new Date(year, month, 0);
return d.getDate();
}
获取前天、昨天、今天、明天、后天的时间
function GetDateStr(AddDayCount) {
var dd = new Date();
dd.setDate(dd.getDate()+AddDayCount);//获取AddDayCount天后的日期
var y = dd.getFullYear();
var m = dd.getMonth()+1;//获取当前月份的日期
var d = dd.getDate();
return y+"-"+m+"-"+d;
}
console.log("前天:"+GetDateStr(-2));
console.log("昨天:"+GetDateStr(-1));
console.log("今天:"+GetDateStr(0));
console.log("明天:"+GetDateStr(1));
console.log("后天:"+GetDateStr(2));
console.log("大后天:"+GetDateStr(3));
获取起始时间算起第n周的日期范围
function weeks_enddate(startdate,n){
var date = new Date(startdate);
date.setTime(date.getTime() + 3600 * 1000 * 24 * 7 * n);//第n周,1、2、3、4.....
return formatDate(date);
}
//示例:
var startdate = '2018-06-27';//或者 var startdate= new Date()这样写也行的
var week_num = 2;//n是从1开始的整数即可
var enddate = weeks_enddate(startdate,week_num);
console.log("enddate :"+enddate );
//enddate :2018-07-11