java 获取昨天，上个星期一，本月开始时间戳，怎么写呢？
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给你点思路
//获得当天0点时间 public static int getTimesmorning(){ Calendar cal = Calendar.getInstance(); cal.set(Calendar.HOUR_OF_DAY, 0); cal.set(Calendar.SECOND, 0); cal.set(Calendar.MINUTE, 0); cal.set(Calendar.MILLISECOND, 0); return (int) (cal.getTimeInMillis()/1000); } //获得当天24点时间 public static int getTimesnight(){ Calendar cal = Calendar.getInstance(); cal.set(Calendar.HOUR_OF_DAY, 24); cal.set(Calendar.SECOND, 0); cal.set(Calendar.MINUTE, 0); cal.set(Calendar.MILLISECOND, 0); return (int) (cal.getTimeInMillis()/1000); } //获得本周一0点时间 public static int getTimesWeekmorning(){ Calendar cal = Calendar.getInstance(); cal.set(cal.get(Calendar.YEAR),cal.get(Calendar.MONDAY), cal.get(Calendar.DAY_OF_MONTH), 0, 0,0); cal.set(Calendar.DAY_OF_WEEK, Calendar.MONDAY); return (int) (cal.getTimeInMillis()/1000); } //获得本周日24点时间 public static int getTimesWeeknight(){ Calendar cal = Calendar.getInstance(); cal.set(cal.get(Calendar.YEAR),cal.get(Calendar.MONDAY), cal.get(Calendar.DAY_OF_MONTH), 0, 0,0); cal.set(Calendar.DAY_OF_WEEK, Calendar.MONDAY); return (int) ((cal.getTime().getTime()+ (7 * 24 * 60 * 60 * 1000))/1000); } //获得本月第一天0点时间 public static int getTimesMonthmorning(){ Calendar cal = Calendar.getInstance(); cal.set(cal.get(Calendar.YEAR),cal.get(Calendar.MONDAY), cal.get(Calendar.DAY_OF_MONTH), 0, 0,0); cal.set(Calendar.DAY_OF_MONTH,cal.getActualMinimum(Calendar.DAY_OF_MONTH)); return (int) (cal.getTimeInMillis()/1000); } //获得本月最后一天24点时间 public static int getTimesMonthnight(){ Calendar cal = Calendar.getInstance(); cal.set(cal.get(Calendar.YEAR),cal.get(Calendar.MONDAY), cal.get(Calendar.DAY_OF_MONTH), 0, 0,0); cal.set(Calendar.DAY_OF_MONTH,cal.getActualMaximum(Calendar.DAY_OF_MONTH)); cal.set(Calendar.HOUR_OF_DAY, 24); return (int) (cal.getTimeInMillis()/1000); }