java周一从1开始

package time;

import java.util.Calendar;

public class TestWeek {

    public static void main(String[] args) {

        Calendar calendar = Calendar.getInstance();
        //获取当年第几周
        int weekOfYear = calendar.get(Calendar.WEEK_OF_YEAR);
        //获取当周星期几
        int dayOfWeek = calendar.get(Calendar.DAY_OF_WEEK);
        //如果是周日，说明是上周的而不是本周的，要获取到上周，后退一天
        if (calendar.get(Calendar.DAY_OF_WEEK) == 1) {
            calendar.add(Calendar.DATE, -1);
            weekOfYear = calendar.get(Calendar.WEEK_OF_YEAR);
             //如果是周日，直接设置星期为7
            dayOfWeek = 7;
        } else {
            //如果不是周日，星期减一
            dayOfWeek--;
        }
        //最终获取周+星期
        System.out.println(String.format("今天是第%d周，星期%d",weekOfYear , dayOfWeek));
    }
}