Java最准确的获取当前一周开始时间和结束时间（格林威治时间）

获取星期日作为一周的第一天的起始时间和结束时间

public static long[] getCurrentWeekTimeFrame() {
Calendar calendar = Calendar.getInstance();
calendar.setTimeZone(TimeZone.getTimeZone("GMT+8"));
//start of the week
calendar.add(Calendar.DAY_OF_WEEK, -(calendar.get(Calendar.DAY_OF_WEEK) - 1));
calendar.set(Calendar.HOUR_OF_DAY, 0);
calendar.set(Calendar.MINUTE, 0);
calendar.set(Calendar.SECOND, 0);
calendar.set(Calendar.MILLISECOND, 0);

long startTime = calendar.getTimeInMillis();
//end of the week
calendar.add(Calendar.DAY_OF_WEEK, 6);
calendar.set(Calendar.HOUR_OF_DAY, 23);
calendar.set(Calendar.MINUTE, 59);
calendar.set(Calendar.SECOND, 59);
calendar.set(Calendar.MILLISECOND, 999);
long endTime = calendar.getTimeInMillis();
return new long[]{startTime, endTime};
}

获取星期一作为一周的第一天的起始时间和结束时间

public static long[] getCurrentWeekTimeFrame() {
Calendar calendar = Calendar.getInstance();
calendar.setTimeZone(TimeZone.getTimeZone("GMT+8"));
//start of the week
if (calendar.get(Calendar.DAY_OF_WEEK) == Calendar.SUNDAY) {
calendar.add(Calendar.DAY_OF_YEAR,-1);
}
calendar.add(Calendar.DAY_OF_WEEK, -(calendar.get(Calendar.DAY_OF_WEEK) - 2));
calendar.set(Calendar.HOUR_OF_DAY, 0);
calendar.set(Calendar.MINUTE, 0);
calendar.set(Calendar.SECOND, 0);
calendar.set(Calendar.MILLISECOND, 0);

long startTime = calendar.getTimeInMillis();
//end of the week
calendar.add(Calendar.DAY_OF_WEEK, 6);
calendar.set(Calendar.HOUR_OF_DAY, 23);
calendar.set(Calendar.MINUTE, 59);
calendar.set(Calendar.SECOND, 59);
calendar.set(Calendar.MILLISECOND, 999);
long endTime = calendar.getTimeInMillis();
return new long[]{startTime, endTime};
}

public static long[] getCurrentWeekTimeFrame() {
Calendar calendar = Calendar.getInstance();
calendar.setTimeZone(TimeZone.getTimeZone("GMT+8"));
//start of the week
if (calendar.get(Calendar.DAY_OF_WEEK) == Calendar.SUNDAY) {
calendar.add(Calendar.DAY_OF_YEAR,-1);
}
calendar.add(Calendar.DAY_OF_WEEK, -(calendar.get(Calendar.DAY_OF_WEEK) - 2));
calendar.set(Calendar.HOUR_OF_DAY, 0);
calendar.set(Calendar.MINUTE, 0);
calendar.set(Calendar.SECOND, 0);
calendar.set(Calendar.MILLISECOND, 0);

long startTime = calendar.getTimeInMillis();
//end of the week
calendar.add(Calendar.DAY_OF_WEEK, 6);
calendar.set(Calendar.HOUR_OF_DAY, 23);
calendar.set(Calendar.MINUTE, 59);
calendar.set(Calendar.SECOND, 59);
calendar.set(Calendar.MILLISECOND, 999);
long endTime = calendar.getTimeInMillis();
return new long[]{startTime, endTime};
}