redis annotation sets cache expiration time

How to set the cache expiration time when using Redis annotations? Import Redis dependencies. Use ttl attributes annotated with @Cacheable and @CachePut. The ttl attribute specifies the cache expiration time in seconds.

Redis annotation sets cache expiration time

Question: How to use Redis annotation Set cache expiration time?

Answer:

To set the cache expiration time when using Redis annotations, you can use @Cacheable and @CachePut The ttl attribute of the annotation.

Specific steps:

1. Import Redis dependencies:

<code class="xml"><dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-data-redis</artifactId>
</dependency></code>

2. Use @Cacheable Annotation:

<code class="java">@Cacheable(value = "cacheName", key = "#key", ttl = 300)
public Object get(Object key) {
    // 逻辑代码
}</code>

Where:

• value Specify the cache name
• key Specify the cache key
• ttl Specify the cache expiration time in seconds

3. Use @CachePut Note:

<code class="java">@CachePut(value = "cacheName", key = "#key", ttl = 300)
public Object put(Object key, Object value) {
    // 逻辑代码
}</code>

In the above example, the get() method gets the data in the cache. If there is no data in the cache, Then the logic code is executed and the results are cached for 5 minutes. The put() method puts the data into the cache and sets the expiration time to 5 minutes.

Note:

• ttl The property can be set to any positive integer in seconds.
• If the ttl attribute is not specified, the cache will never expire.

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