java获取昨天0点时间和今天0点时间

已封装在方法中

 public static Map<String, String> ZeroTime() {
        long timeStamp = System.currentTimeMillis();
        long zero = timeStamp / (1000 * 3600 * 24) * (1000 * 3600 * 24) - TimeZone.getDefault().getRawOffset();
        long yzero = timeStamp / (1000 * 3600 * 24) * (1000 * 3600 * 24) - TimeZone.getDefault().getRawOffset() - 24 * 60 * 60 * 1000;
        SimpleDateFormat Spdate = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
        //long时间戳转date
        Date todayDate = new Date(zero);
        Date yesterdayDate = new Date(yzero);
        //date格式化为string
        String today = Spdate.format(todayDate);
        String yesterday = Spdate.format(yesterdayDate);
        Map<String, String> map = new HashMap<>();
        map.put("today", today);
        map.put("yesterday", yesterday);
        return map;
    }

日期格式为字符串

2019-11-21 00:00:00
2019-11-20 00:00:00

当mybatis操作数据库时
数据库时间格式为datetime类型等可以直接传入使用