计算出给定日期所在周的周一和周日

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

 

 

评论

1 楼 xiaowugegzh 2011-10-17  

写的不错，QQ 418416015，聊聊技术啊，呵呵