从周号中查找一周的开始结束日期

耶利基斯

我使用Servlet和JSP构建一个Web应用程序，并在Servlet中计算周数：

 private int findWeekNumber(String myDate) 
    throws ParseException{
        SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd");
        Date date;
        date = df.parse(myDate);
        Calendar cal = Calendar.getInstance();
        cal.setTime(date);
        int week = cal.get(Calendar.WEEK_OF_YEAR);
        System.out.println("week number is:" + week);

        return week;
    }

然后将保存week到我的数据库中。然后，我week从数据库中检索。如何从中获取一周的开始-结束日期（一周的开始时间是星期一）week？可以说weekNumber是30，我想计算20/07/2015-26/07/2015。相同的功能在这里

编码器鳄鱼

你可以用Calendar这个

 Calendar cal = Calendar.getInstance();
 cal.set(Calendar.WEEK_OF_YEAR, week);
 Date yourDate = cal.getTime();

 cal.setTime(yourDate);//Set specific Date of which start and end you want

 Date start,end;

 cal.set(Calendar.DAY_OF_WEEK, Calendar.MONDAY);
 start = cal.getTime();//Date of Monday of current week

 cal.add(Calendar.DATE, 6);//Add 6 days to get Sunday of next week
 cal.set(Calendar.DAY_OF_WEEK, Calendar.SUNDAY);
 end = cal.getTime();//Date of Sunday of current week
 System.out.println(start +" - "+ end);

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