`
www-hello
  • 浏览: 98518 次
  • 性别: Icon_minigender_1
  • 来自: 上海
社区版块
存档分类
最新评论

计算出给定日期所在周的周一和周日

阅读更多

计算出给定日期所在周的周一和周日

 

结果类:

import java.util.Date;

public class Week {
	private Date date;	//日期
	private Date start;	//date所在周的第一天(星期一)
	private Date end;	//date所在周的最后一天(星期日)

	public Week(Date date){
		this.date = date;
	}
	
	public Date getDate() {
		return date;
	}

	public void setDate(Date date) {
		this.date = date;
	}

	public Date getStart() {
		return start;
	}

	public void setStart(Date start) {
		this.start = start;
	}

	public Date getEnd() {
		return end;
	}

	public void setEnd(Date end) {
		this.end = end;
	}

}

 

工具方法:

import org.apache.commons.lang.time.DateUtils;

/**
	 * 计算出给定日期所在周的周一和周日
	 * 
	 * @param date
	 * @return
	 * @throws ParseException
	 */
	public static Week getWeekByDate(Date date) throws ParseException {
		Date _date = DateUtils.truncate(date, Calendar.DAY_OF_MONTH);
		Calendar c = Calendar.getInstance();
		c.setTime(_date);
		// 星期:1,2,3,4,5,6,7
		int iWeek = c.get(Calendar.DAY_OF_WEEK);
		//时期日->星期八
		if(iWeek == 1){
			iWeek = 8;
		}
		Week week = new Week(_date);
		// 算出离星期一(2)的距离
		week.setStart(DateUtils.addDays(_date, 2 - iWeek));
		// 算出离星期日(8)的距离
		week.setEnd(DateUtils.addDays(_date, 8 - iWeek));
		return week;
	}

 

测试代码:

public static void main(String[] args) throws Exception {
		SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss SSS");

		Date date = DateUtils.parseDate("2011-05-11", new String[] { "yyyy-MM-dd" });
		System.out.println("------" + df.format(date) + "------");
		Week week = getWeekByDate(date);
		System.out.println(df.format(week.getStart()));
		System.out.println(df.format(week.getEnd()));
		date = DateUtils.parseDate("2011-05-09", new String[] { "yyyy-MM-dd" });
		System.out.println("------" + df.format(date) + "------");
		week = getWeekByDate(date);
		System.out.println(df.format(week.getStart()));
		System.out.println(df.format(week.getEnd()));
		date = DateUtils.parseDate("2011-05-15", new String[] { "yyyy-MM-dd" });
		System.out.println("------" + df.format(date) + "------");
		week = getWeekByDate(date);
		System.out.println(df.format(week.getStart()));
		System.out.println(df.format(week.getEnd()));

	}

 测试结果:

------2011-05-11 00:00:00 000------
2011-05-09 00:00:00 000
2011-05-15 00:00:00 000
------2011-05-09 00:00:00 000------
2011-05-09 00:00:00 000
2011-05-15 00:00:00 000
------2011-05-15 00:00:00 000------
2011-05-09 00:00:00 000
2011-05-15 00:00:00 000
 

 

分享到:
评论
1 楼 xiaowugegzh 2011-10-17  
写的不错,QQ 418416015,聊聊技术啊,呵呵

相关推荐

Global site tag (gtag.js) - Google Analytics