时间设置利用Java设置Redis过期时间（redisjava过期）

Nowadays, Redis is widely used as the main memory storage technology, and it is often used to store thebusiness data of applications. The expiration time of Redis can extend the life cycle of key-value pairs, and there are various methods to set different expiration times. Taking advantage of Java is one of the commonly used methods. This article mainly describes how to use Java to set the expiration time of Redis.

In order to set the expiration time of Redis in Java, you need to operate the redis instance, and get the Jedis instance before the operation. Jedis is a client library written in Java to connect and communicate with the Redis server. The initialization code of Jedis is as follows:

Jedis jedis = new Jedis(“localhost”, 6379);

After the Jedis instance is successfully initialized, you can use the expire() method in Jedis to set the expiration time for key-value pairs. For example, use the following code to set the expiration time of the key to 10 seconds:

jedis.expire(“myKey”, 10);

The expire() method is an asynchronous operation, which will start a separate thread to wait for the expiration period. After that, the Redis server will delete the expiration key. For the expiration process, you can use the ttl() method to get the remaining expiration time. The following example illustrates this:

Long ttl=jedis.ttl(“myKey”);

At the same time, you can also use the pExpire() and pExpireAt() methods to set expiration times with millisecond accuracy, as follows:

jedis.pexpire(“myKey”, 10000);

jedis.pexpireAt(“myKey”,timestamp);

By taking advantage of the Jedis client library, you can easily set the expiration time of the Redis instance in Java. Setting the expiration time of Redis can bring great convenience for data cleanup and other operations.