JAVA 获取当前月的初始时间的时间戳

JAVA 获取当前月的初始时间的时间戳

public static long getMonthFirstDay() {Calendar calendar = Calendar.getInstance();// 获取当前日期calendar.add(Calendar.MONTH, 0);calendar.set(Calendar.DAY_OF_MONTH, 1);// 设置为1号,当前日期既为本月第一天calendar.set(Calendar.HOUR_OF_DAY, 0);calendar.set(Calendar.MINUTE, 0);calendar.set(Calendar.SECOND, 0);System.out.println(calendar.getTimeInMillis());return calendar.getTimeInMillis();}