Calendar根据输入的年份和周数计算该周的开始日期和结束日期

import java.text.SimpleDateFormat;

import java.util.Calendar;

public class test2 {

public static String getFirstDayOfWeek(int year, int week) {

Calendar firDay = Calendar.getInstance();

// 先滚动到该年

firDay.set(Calendar.YEAR, year);

// 滚动到周

firDay.set(Calendar.WEEK_OF_YEAR, week + 1);

// 得到该周第一天

firDay.set(Calendar.DAY_OF_WEEK, 2);

SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");

String firstDay = sdf.format(firDaya.getTime());

return firstDay;

}

public static String getLastDayOfWeek(int year,int week){

Calendar lasDay = Calendar.getInstance();

// 先滚动到该年

lasDay.set(Calendar.YEAR, year);

// 滚动到周

lasDay.set(Calendar.WEEK_OF_YEAR, week + 1);

// 得到该周第一天

lasDay.set(Calendar.DAY_OF_WEEK, 2);

// 得到该周最后一天

lasDay.add(Calendar.DAY_OF_WEEK, 4);

SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");

String lastDay = sdf.format(lasDay.getTime());

return lastDay;

}

/**

* @param args

*/

public static void main(String[] args) {

System.out.print("第38周的星期一到星期五的日期是："+test2.getFirstDayOfWeek(, 1)+"——");

System.out.println(test2.getLastDayOfWeek(, 1));

}

}

运行结果：