检测Redis Java过期数据检测实践（redisjava过期）

In the process of application development, caching technology is often used to improve the performance of the system. Redis is a popular cache technology, so how to detect expired data in Redis with Java? This article will illustrate the solution of detecting the expired data in Redis with Java through the practical example.

First of all, we need to make sure the environment is ready, including the preparation of Redis and Java package. After that, we can write the code in Java language to detect the expired data in Redis. Specifically, we need to get the flag value of the redisKey corresponding to the expired time through the Redis get method, and convert the flag value into a long type. Then, we need to judge whether the flag value is greater than the current system time, if it is greater than the current system time, it means that this key has not expired, on the contrary, it means that this key has expired. The specific codes are listed below：

// 获取 redisKey 对应的过期时间标识 Long expireFlag = Long.parseLong(jedis.get(redisKey));

// 判断过期时间标识是否大于当前系统时间 if (expireFlag > System.currentTimeMillis()){ // 未过期 } else { // 已过期 }

In a word, this article introduces the detection of expired data in Redis with Java program. If the technical requirements of the project are to detect the expired data in Redis, then this method is feasible and can be used as an improvement of your project.