SpringBoot实现Read Through模式的操作过程

<!-- Spring Boot Starter Cache -->
<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-cache</artifactId>
</dependency>
<!-- 以Redis为例，添加Redis的Spring Boot Starter -->
<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-data-redis</artifactId>
</dependency>

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.data.redis.cache.RedisCacheConfiguration;
import org.springframework.data.redis.cache.RedisCacheManager;
import org.springframework.data.redis.connection.RedisConnectionFactory;
@Configuration
public class RedisCacheConfig {
    @Bean
    public RedisCacheManager cacheManager(RedisConnectionFactory connectionFactory) {
        RedisCacheConfiguration config = RedisCacheConfiguration.defaultCacheConfig()
                .serializeKeysWith(RedisSerializationContext.SerializationPair.fromSerializer(RedisSerializer.string()))
                .serializeValuesWith(RedisSerializationContext.SerializationPair.fromSerializer(GenericJackson2JsonRedisSerializer.json())))
Map<String, RedisCacheConfiguration> customCacheConfigs = new HashMap<>();
customCacheConfigs.put("mySpecialCache", 
    config.entryTtl(Duration.ofMinutes(15))); // 为特定缓存设置不同的过期时间
                .disableCachingNullValues();
        return RedisCacheManager.builder(connectionFactory)
                .cacheDefaults(config)
            // 在这里可以自定义添加缓存配置
                .withInitialCacheConfigurations(customCacheConfigs)
                .build();
    }
}

import org.springframework.cache.annotation.Cacheable;
import org.springframework.stereotype.Service;
@Service
public class MyService {
    @Cacheable(value = "myCache", key = "#id")
    public MyData getDataById(String id) {
        // 从数据库加载数据
        return myDataRepository.findById(id);
    }
}

@Cacheable(value = "myCacheName", key = "#id")

@Cacheable(cacheNames = "myCache", key = "#id")

@Cacheable(cacheNames = "myCache", key = "#id", condition = "#id.length() > 3")

@Cacheable(cacheNames = "myCache", key = "#id", unless = "#result == null")

@Cacheable(cacheNames = "myCache", keyGenerator = "myKeyGenerator")

@Cacheable(cacheNames = "myCache", cacheManager = "myCacheManager")

@Cacheable(cacheNames = "myCache", key = "#id", expireAfterWrite = 3600000) // 1小时后过期