How to set the redis validity period

This article mainly explains "how to set the period of validity of redis". The content of the explanation is simple and clear, and it is easy to learn and understand. Please follow the editor's train of thought to study and learn "how to set the validity period of redis".

1 about redisKey construction

Private String key (RedisShip I) {

/ / return String.format ("% s_%d_%d_%d", KEY_PREFIX, getNow (), i.getPosTime (), i.getGrid ())

Return String.format ("% s:%d:%d:%d", KEY_PREFIX, getNow (), i.getPosTime (), i.getGrid ());}

2 about getting the current time 0: 00

Public Integer getNow () {/ / Calendar calendar = Calendar.getInstance (); / / calendar.setTime (new Date ()); / / calendar.set (calendar.get (Calendar.YEAR), / / calendar.get (Calendar.MONTH), calendar.get (Calendar.DATE), / / 0,0,0); return Math.toIntExact (Instant.now (). GetEpochSecond () / 86400 * 86400);}

3 about setting the period of validity of redis

Private static final Duration DURATION = Duration.ofDays (2)

Connection.expire (key, DURATION.getSeconds ())

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