Java获取上周一周末和上月初月末

package pub;


import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;


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


public class GetDate {


// 获取上周一
public String getLastWeekMonday(Date date) {
Date a = DateUtils.addDays(date, -1);
Calendar cal = Calendar.getInstance();
cal.setTime(a);
cal.add(Calendar.WEEK_OF_YEAR, -1);// 一周
cal.set(Calendar.DAY_OF_WEEK, Calendar.MONDAY);
SimpleDateFormat df = new SimpleDateFormat("yyyy/MM/dd");
System.out.println("上周一" + df.format(cal.getTime()));
return df.format(cal.getTime());
}


// 获取上周日
public String getLastWeekSunday(Date date) {
Date a = DateUtils.addDays(date, -1);
Calendar cal = Calendar.getInstance();
cal.setTime(a);
cal.set(Calendar.DAY_OF_WEEK, 1);
SimpleDateFormat df = new SimpleDateFormat("yyyy/MM/dd");
System.out.println("上周日" + df.format(cal.getTime()));
return df.format(cal.getTime());
}


// 获取上月第一天
public static String getLastMonthDayOne(Date date) {
Calendar calendar1 = Calendar.getInstance();
calendar1.add(Calendar.MONTH, -1);
calendar1.set(Calendar.DAY_OF_MONTH, 1);
SimpleDateFormat sdf = new SimpleDateFormat("yyyy/MM/dd");
System.out.println("上月初：" + sdf.format(calendar1.getTime()));
return sdf.format(calendar1.getTime());
}


// 获取上月最后一天
public static String getLastMonthLastDay(Date date) {
Calendar calendar2 = Calendar.getInstance();
calendar2.set(Calendar.DAY_OF_MONTH, 0);
SimpleDateFormat sdf = new SimpleDateFormat("yyyy/MM/dd");
System.out.println("上月末：" + sdf.format(calendar2.getTime()));
return sdf.format(calendar2.getTime());
}


public static void main(String[] args) {

/*Date date = new Date();
getLastMonthDayOne(date);
getLastMonthLastDay(date);*/
}
}