java 和javascript 获取当前日期时间和本周日期时间 .
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2022-06-10 19:47:44
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今天在项目中统计一周内的新站入网数,所以要获取当前日期时间,并由当前日期获取本周的日期,在网上查了一下,将简便的方法记录下来,以便日后有需要。
import java.util.Calendar; public class Test { public static void main(String[] args) { Calendar cal =Calendar.getInstance(); SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd"); cal.set(Calendar.DAY_OF_WEEK, Calendar.MONDAY); //获取本周一的日期 System.out.println(df.format(cal.getTime())); //这种输出的是上个星期周日的日期,因为老外那边把周日当成第一天 cal.set(Calendar.DAY_OF_WEEK, Calendar.SUNDAY); //增加一个星期,才是我们中国人理解的本周日的日期 cal.add(Calendar.WEEK_OF_YEAR, 1); System.out.println(df.dateFormat(cal.getTime())); } }
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title>获取当前周</title> </head> <body> </body> </html> <script type="text/javascript"> function test(){ var date=new Date(); var date2=new Date(); var day=date.getDay(); var ms=date.getMilliseconds(); var Mon,Sun; var tmp=1000*60*60*24; switch(day){ case 0: Mon=ms-6*tmp; Sun=ms; break; case 1: Mon=ms; Sun=ms+6*tmp; break; case 2: Mon=ms-1*tmp; Sun=ms+5*tmp; break; case 3: Mon=ms-2*tmp; Sun=ms+4*tmp; break; case 4: Mon=ms-3*tmp; Sun=ms+3*tmp; break; case 5: Mon=ms-4*tmp; Sun=ms+2*tmp; break; case 6: Mon=ms-5*tmp; Sun=ms+1*tmp; break; } date.setMilliseconds(Mon); document.write("周一"+date.getFullYear()+"-"+(date.getMonth()+1)+"-"+date.getDate()+"<br />"); document.write("周二"+date.getFullYear()+"-"+(date.getMonth()+1)+"-"+(date.getDate()+1)+"<br />"); document.write("周三"+date.getFullYear()+"-"+(date.getMonth()+1)+"-"+(date.getDate()+2)+"<br />"); document.write("周四"+date.getFullYear()+"-"+(date.getMonth()+1)+"-"+(date.getDate()+3)+"<br />"); document.write("周五"+date.getFullYear()+"-"+(date.getMonth()+1)+"-"+(date.getDate()+4)+"<br />"); document.write("周六"+date.getFullYear()+"-"+(date.getMonth()+1)+"-"+(date.getDate()+5)+"<br />"); date2.setMilliseconds(Sun); document.write("周日"+date2.getFullYear()+"-"+(date2.getMonth()+1)+"-"+date2.getDate()); } test() </script>
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