java Date 当天时间戳处理

1. 代码

 private static final String DATE_FORMAT = "yyyy-MM-dd HH:mm:ss";
    private static Date getStartTime() {
        Calendar todayStart = Calendar.getInstance();
        todayStart.set(Calendar.HOUR_OF_DAY, 0);
        todayStart.set(Calendar.MINUTE, 0);
        todayStart.set(Calendar.SECOND, 0);
        todayStart.set(Calendar.MILLISECOND, 0);
        return todayStart.getTime();
    }
 
    private static Date getEndTime() {
        Calendar todayEnd = Calendar.getInstance();
        todayEnd.set(Calendar.HOUR_OF_DAY, 23);
        todayEnd.set(Calendar.MINUTE, 59);
        todayEnd.set(Calendar.SECOND, 59);
        todayEnd.set(Calendar.MILLISECOND, 999);
        return todayEnd.getTime();
    }

　　public static String getStartTimeStr(){
    return new SimpleDateFormat(DATE_FORMAT).format(getStartTime());
}
 
public static String getEndTimeStr(){
    return  new SimpleDateFormat(DATE_FORMAT).format(getEndTime());
}

2. 其他的joda框架好像也可以方便get到当日起止时间戳

java自带日期也好使， Calendar.HOUR_OF_DAY要搞对，不然出现过了12点，结果从今日12时到明日12时