{"id":27,"date":"2007-05-21T00:23:23","date_gmt":"2007-05-21T04:23:23","guid":{"rendered":"http:\/\/prglab.com\/blog\/?page_id=27"},"modified":"2010-09-30T10:19:30","modified_gmt":"2010-09-30T14:19:30","slug":"js-date","status":"publish","type":"page","link":"https:\/\/www.prglab.com\/blog\/js-tutorial\/js-date","title":{"rendered":"JavaScript\u4e2d\u7684\u65e5\u671f(Date)"},"content":{"rendered":"

\u65e5\u671f\u5bf9\u8c61Date object\u662f\u7528\u6765\u5bf9\u65e5\u671f\u548c\u65f6\u95f4\u8fdb\u884c\u64cd\u4f5c\u7684\u3002
\n—————————————————————————–
\n\u5b9a\u4e49\u4e00\u4e2a\u65e5\u671f\u5bf9\u8c61<\/strong><\/p>\n

\u4f7f\u7528\u5173\u952e\u8bcdnew\u6765\u5b9a\u4e49\u4e00\u4e2aDate\u5bf9\u8c61\uff0c\u5982\u4e0b\u9762\u4f8b\u5b50\u4e2d\u6240\u793a\uff0c\u5b9a\u4e49\u4e00\u4e2a\u540d\u4e3amyDate\u7684\u65e5\u671f\u5bf9\u8c61\uff1a<\/p>\n\n\n\n
var myDate=new Date()<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\u6ce8\u610f\uff1a<\/strong>\u65e5\u671f\u5bf9\u8c61\u4f1a\u81ea\u52a8\u53d6\u5f53\u524d\u7684\u65e5\u671f\u548c\u65f6\u95f4\u4e3a\u521d\u59cb\u503c\u3002<\/p>\n

——————————————————————————-
\n\u5bf9\u65e5\u671f\u8fdb\u884c\u64cd\u4f5c<\/strong><\/p>\n

\u4f7f\u7528Date\u5bf9\u8c61\u7684\u51fd\u6570\u53ef\u4ee5\u65b9\u4fbf\u7684\u5bf9\u65e5\u671f\u8fdb\u884c\u64cd\u4f5c\u3002
\n\u5728\u4e0b\u9762\u7684\u4f8b\u5b50\u4e2d\u6211\u4eec\u8bbe\u7f6e\u4e00\u4e2a\u65e5\u671f\u5bf9\u8c61\u4e3a\u4e00\u4e2a\u6307\u5b9a\u7684\u65e5\u671f\u503c(2010\u5e741\u670814\u65e5\uff09\uff1a<\/p>\n\n\n\n
var myDate=new Date()
\nmyDate.setFullYear(2010,0,14)<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\u5728\u4e0b\u9762\u7684\u4f8b\u5b50\u4e2d\u6211\u4eec\u5c06myDate\u7684\u503c\u8bbe\u4e3a5\u5929\u540e\uff1a<\/p>\n\n\n\n
var myDate=new Date()
\nmyDate.setDate(myDate.getDate()+5)<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

\u6ce8\u610f\uff1a<\/strong>\u5982\u679c\u589e\u52a05\u5929\u540e\u8fdb\u5165\u53e6\u5916\u4e00\u4e2a\u6708\u6216\u4e00\u5e74\uff0cDate\u5bf9\u8c61\u4f1a\u81ea\u52a8\u5904\u7406\u7684\u3002<\/p>\n

———————————————————————————
\n\u5bf9\u65e5\u671f\u8fdb\u884c\u6bd4\u8f83<\/strong><\/p>\n

\u4f7f\u7528Date\u5bf9\u8c61\u53ef\u4ee5\u5bf9\u65e5\u671f\u8fdb\u884c\u6bd4\u8f83\u3002 \u4e0b\u9762\u7684\u4f8b\u5b50\u5c06\u4eca\u5929\u7684\u65e5\u671f\u4e0e2010\u5e741\u670814\u65e5\u8fdb\u884c\u6bd4\u8f83\uff1a<\/p>\n\n\n\n
var myDate=new Date()
\nmyDate.setFullYear(2010,0,14)var today = new Date()<\/p>\n

if (myDate>today)
\nalert(“\u4eca\u5929\u8fd8\u6ca1\u52302010\u5e741\u670814\u65e5”)
\nelse
\nalert(“\u4eca\u5929\u5df2\u7ecf\u8fc7\u4e862010\u5e741\u670814\u65e5”)<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

——————————————————————————–
\n\u4f8b\uff1a\u663e\u793a\u5f53\u524d\u7684\u65e5\u671f\u548c\u65f6\u95f4<\/strong><\/p>\n\n\n\n
<html>
\n<body><script type=”text\/javascript”><\/p>\n

document.write(Date())<\/p>\n

<\/script><\/p>\n

<\/body>
\n<\/html><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

————————————————————————
\n\u4f8b\uff1agetTime()\u51fd\u6570<\/strong>
\n\u4f7f\u7528getTime()\u51fd\u6570\u8ba1\u7b97\u81ea1970\u5e74\u540e\u5df2\u7ecf\u8fc7\u4e86\u591a\u5c11\u5e74<\/p>\n\n\n\n
<html>
\n<body><script type=”text\/javascript”><\/p>\n

var minutes = 1000*60
\nvar hours = minutes*60
\nvar days = hours*24
\nvar years = days*365
\nvar d = new Date()
\nvar t = d.getTime()
\nvar y = t\/years<\/p>\n

document.write(“It’s been: ” + y + ” years since 1970\/01\/01!”)<\/p>\n

<\/script><\/p>\n

<\/body>
\n<\/html><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

———————————————————————–
\n\u4f8b\uff1a\u51fd\u6570setFullYear()<\/strong>
\n\u4f7f\u7528setFullYear()\u51fd\u6570\u6765\u8bbe\u7f6e\u4e00\u4e2a\u65e5\u671f<\/p>\n\n\n\n
<html>
\n<body><script type=”text\/javascript”><\/p>\n

var d = new Date()
\nd.setFullYear(1992,10,3)
\ndocument.write(d)<\/p>\n

<\/script><\/p>\n

<\/body>
\n<\/html><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

—————————————————————————
\n\u4f8b\uff1a\u51fd\u6570toUTCString()<\/strong>
\n\u4f7f\u7528toUTCString()\u51fd\u6570\u5c06\u4eca\u5929\u7684\u65e5\u671f\u8f6c\u6362\u4e3a\u4e00\u4e2a\u5b57\u7b26\u4e32<\/p>\n\n\n\n
<html>
\n<body><script type=”text\/javascript”><\/p>\n

var d = new Date()
\ndocument.write (d.toUTCString())<\/p>\n

<\/script><\/p>\n

<\/body>
\n<\/html><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

——————————————————————————
\n\u4f8b\uff1a\u51fd\u6570getDay()<\/strong>
\n\u4f7f\u7528getDay()\u51fd\u6570\u548c\u4e00\u4e2a\u6570\u7ec4\u6765\u5199\u51fa\u661f\u671f\u51e0<\/p>\n\n\n\n
<html>
\n<body><script type=”text\/javascript”><\/p>\n

var d=new Date()
\nvar weekday=new Array(7)
\nweekday[0]=”Sunday”
\nweekday[1]=”Monday”
\nweekday[2]=”Tuesday”
\nweekday[3]=”Wednesday”
\nweekday[4]=”Thursday”
\nweekday[5]=”Friday”
\nweekday[6]=”Saturday”<\/p>\n

document.write(“Today it is ” + weekday[d.getDay()])<\/p>\n

<\/script><\/p>\n

<\/body>
\n<\/html><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

——————————————————————————–
\n\u4f8b\uff1a\u663e\u793a\u4e00\u4e2a\u65f6\u949f<\/strong><\/p>\n\n\n\n
<html>
\n<head>
\n<script type=”text\/javascript”>
\nfunction startTime()
\n{
\nvar today=new Date()
\nvar h=today.getHours()
\nvar m=today.getMinutes()
\nvar s=today.getSeconds()
\n\/\/ add a zero in front of numbers<10
\nm=checkTime(m)
\ns=checkTime(s)
\ndocument.getElementById(‘txt’).innerHTML=h+”:”+m+”:”+s
\nt=setTimeout(‘startTime()’,500)
\n}function checkTime(i)
\n{
\nif (i<10)
\n{i=”0″ + i}
\nreturn i
\n}
\n<\/script>
\n<\/head><\/p>\n

<body onload=”startTime()”>
\n<div id=”txt”><\/div>
\n<\/body>
\n<\/html><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"excerpt":{"rendered":"

\u65e5\u671f\u5bf9\u8c61Date object\u662f\u7528\u6765\u5bf9\u65e5\u671f\u548c\u65f6\u95f4\u8fdb\u884c\u64cd\u4f5c\u7684\u3002 —————————————————————————– \u5b9a\u4e49\u4e00\u4e2a\u65e5\u671f\u5bf9\u8c61 \u4f7f\u7528\u5173\u952e\u8bcdnew\u6765\u5b9a\u4e49\u4e00\u4e2aDate\u5bf9\u8c61\uff0c\u5982\u4e0b\u9762\u4f8b\u5b50\u4e2d\u6240\u793a\uff0c\u5b9a\u4e49\u4e00\u4e2a\u540d\u4e3amyDate\u7684\u65e5\u671f\u5bf9\u8c61\uff1a var myDate=new Date() \u6ce8\u610f\uff1a\u65e5\u671f\u5bf9\u8c61\u4f1a\u81ea\u52a8\u53d6\u5f53\u524d\u7684\u65e5\u671f\u548c\u65f6\u95f4\u4e3a\u521d\u59cb\u503c\u3002 ——————————————————————————- \u5bf9\u65e5\u671f\u8fdb\u884c\u64cd\u4f5c \u4f7f\u7528Date\u5bf9\u8c61\u7684\u51fd\u6570\u53ef\u4ee5\u65b9\u4fbf\u7684\u5bf9\u65e5\u671f\u8fdb\u884c\u64cd\u4f5c\u3002 \u5728\u4e0b\u9762\u7684\u4f8b\u5b50\u4e2d\u6211\u4eec\u8bbe\u7f6e\u4e00\u4e2a\u65e5\u671f\u5bf9\u8c61\u4e3a\u4e00\u4e2a\u6307\u5b9a\u7684\u65e5\u671f\u503c(2010\u5e741\u670814\u65e5\uff09\uff1a var myDate=new Date() myDate.setFullYear(2010,0,14) \u5728\u4e0b\u9762\u7684\u4f8b\u5b50\u4e2d\u6211\u4eec\u5c06myDate\u7684\u503c\u8bbe\u4e3a5\u5929\u540e\uff1a var myDate=new Date() myDate.setDate(myDate.getDate()+5) \u6ce8\u610f\uff1a\u5982\u679c\u589e\u52a05\u5929\u540e\u8fdb\u5165\u53e6\u5916\u4e00\u4e2a\u6708\u6216\u4e00\u5e74\uff0cDate\u5bf9\u8c61\u4f1a\u81ea\u52a8\u5904\u7406\u7684\u3002 ——————————————————————————— \u5bf9\u65e5\u671f\u8fdb\u884c\u6bd4\u8f83 \u4f7f\u7528Date\u5bf9\u8c61\u53ef\u4ee5\u5bf9\u65e5\u671f\u8fdb\u884c\u6bd4\u8f83\u3002 \u4e0b\u9762\u7684\u4f8b\u5b50\u5c06\u4eca\u5929\u7684\u65e5\u671f\u4e0e2010\u5e741\u670814\u65e5\u8fdb\u884c\u6bd4\u8f83\uff1a var myDate=new Date() myDate.setFullYear(2010,0,14)var today = new Date() if (myDate>today) alert(“\u4eca\u5929\u8fd8\u6ca1\u52302010\u5e741\u670814\u65e5”) else alert(“\u4eca\u5929\u5df2\u7ecf\u8fc7\u4e862010\u5e741\u670814\u65e5”) ——————————————————————————– \u4f8b\uff1a\u663e\u793a\u5f53\u524d\u7684\u65e5\u671f\u548c\u65f6\u95f4 <html> <body><script type=”text\/javascript”> document.write(Date()) <\/script> <\/body> <\/html> ———————————————————————— \u4f8b\uff1agetTime()\u51fd\u6570 \u4f7f\u7528getTime()\u51fd\u6570\u8ba1\u7b97\u81ea1970\u5e74\u540e\u5df2\u7ecf\u8fc7\u4e86\u591a\u5c11\u5e74 <html> <body><script type=”text\/javascript”> […]<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":3,"menu_order":20,"comment_status":"open","ping_status":"open","template":"","meta":[],"_links":{"self":[{"href":"https:\/\/www.prglab.com\/blog\/wp-json\/wp\/v2\/pages\/27"}],"collection":[{"href":"https:\/\/www.prglab.com\/blog\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/www.prglab.com\/blog\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/www.prglab.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.prglab.com\/blog\/wp-json\/wp\/v2\/comments?post=27"}],"version-history":[{"count":6,"href":"https:\/\/www.prglab.com\/blog\/wp-json\/wp\/v2\/pages\/27\/revisions"}],"predecessor-version":[{"id":185,"href":"https:\/\/www.prglab.com\/blog\/wp-json\/wp\/v2\/pages\/27\/revisions\/185"}],"up":[{"embeddable":true,"href":"https:\/\/www.prglab.com\/blog\/wp-json\/wp\/v2\/pages\/3"}],"wp:attachment":[{"href":"https:\/\/www.prglab.com\/blog\/wp-json\/wp\/v2\/media?parent=27"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}