JAVA后端日期处理的方法

private Date getOperateDate() {
    Date date = Calendar.getInstance().getTime();
    Calendar c = Calendar.getInstance();
    c.set(Calendar.HOUR_OF_DAY, 16); //HOUR_OF_DAY是24小时制，HOUR是12小时制
    c.set(Calendar.MINUTE, 0);
    c.set(Calendar.SECOND, 0);
    if (date.before(c.getTime())) {
        return date;
    } else {
        c.setTime(date);
        c.add(Calendar.DAY_OF_MONTH, 1);
        return c.getTime();
    }
}