spring cache之自定義keys的過時時間

spring @cacheable註解默認不支持方法級別的緩存失效時間,只能經過配置來配置全局的失效時間redis

若是須要實現對方法級別的緩存支持失效時間機制,有一種比較簡單的方法,spring配置文件以下:spring

<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<beans xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xmlns="http://www.springframework.org/schema/beans"
       xmlns:context="http://www.springframework.org/schema/context"
       xmlns:cache="http://www.springframework.org/schema/cache"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
       http://www.springframework.org/schema/beans/spring-beans.xsd
       http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd
       http://www.springframework.org/schema/cache http://www.springframework.org/schema/cache/spring-cache.xsd">
    <context:component-scan base-package="redis.cache"/>
    <context:annotation-config/>
    <cache:annotation-driven cache-manager="redisCacheManager"/>
    <bean class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
        <property name="locations">
            <list>
                <value>classpath:redis.properties</value>
            </list>
        </property>
    </bean>
    <!-- 配置JedisPoolConfig實例 -->
    <bean id="poolConfig" class="redis.clients.jedis.JedisPoolConfig">
        <property name="maxIdle" value="${redis.maxIdle}"/>
        <property name="maxTotal" value="${redis.maxActive}"/>
        <property name="maxWaitMillis" value="${redis.maxWait}"/>
        <property name="testOnBorrow" value="${redis.testOnBorrow}"/>
    </bean>
    <!-- 配置JedisConnectionFactory -->
    <bean id="jedisConnectionFactory" class="org.springframework.data.redis.connection.jedis.JedisConnectionFactory">
        <property name="hostName" value="${redis.host}"/>
        <property name="port" value="${redis.port}"/>
        <property name="password" value="${redis.pass}"/>
        <property name="database" value="${redis.dbIndex}"/>
        <property name="poolConfig" ref="poolConfig"/>
    </bean>
    <!-- 配置RedisTemplate -->
    <bean id="redisTemplate" class="org.springframework.data.redis.core.StringRedisTemplate">
        <property name="connectionFactory" ref="jedisConnectionFactory"/>
    </bean>
    <!-- 配置RedisCacheManager -->
    <bean id="redisCacheManager" class="org.springframework.data.redis.cache.RedisCacheManager">
        <constructor-arg name="redisOperations" ref="redisTemplate"/>
        <property name="defaultExpiration" value="${redis.expiration}"/>
        <property name="expires">
            <map>
                <entry key="test" value="30"/>
            </map>
        </property>
    </bean>
</beans>

配置文件中的redisCacheManager對象配置了expires屬性,該屬性是一個map,能夠用來設置某些keys的過時時間緩存

defaultExpiration屬性設置了全局的默認失效時間,而expires屬性則根據map指定的key單獨設置失效時間,能夠指定多對key value,spa

時間單位爲:秒code

注意:expires屬性中map的key對應的是@cacheable註解中的value屬性指定的值,而不是key。例如:component

@Cacheable(value = "test", key = "'testUser_' + #id")
public String testExpire(Long id) {
    return "test";
}

若是要爲上述方法設置過時時間30秒,則配置文件中expires屬性的key值必定要指定test,而不是testUser_#idxml

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