目录

前言

集成

maven依赖

CacheManagerConfig配置

redis配置

使用

Springboot 集成使用缓存

@Cacheable

@CacheEvict

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前言

现有项目中经常遇到的缓存集成问题，Springboot提供了统一的接口抽象与缓存管理器，可集成多种缓存类型，如  ConcurrentMap 缓存、redis缓存，并可以随时无缝替换底层缓存存储。

集成

maven依赖

<dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-cache</artifactId>
</dependency>
<dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-data-redis</artifactId>
</dependency>
<dependency><groupId>redis.clients</groupId><artifactId>jedis</artifactId><version>3.3.0</version>
</dependency>

CacheManagerConfig配置

下面配置了2个，一个是localCacheManager，底层用的是ConcurrentMap，另一个是 RedisCacheManager，底层用的是redis。

通过 @Primary 注解，可以控制那个是主缓存。

@Configuration
@EnableCaching
@EnableConfigurationProperties(CacheProperties.class)
public class CacheManagerConfig {public static final String CACHE_MANAGER_LOCAL = "localCacheManager";public static final String CACHE_MANAGER_REDIS = "redisCacheManager";@Autowiredprivate CacheProperties cacheProperties;@Bean(name = CACHE_MANAGER_LOCAL)public CacheManager localCacheManager() {return new ConcurrentMapCacheManager();}@Primary@Bean(name = CACHE_MANAGER_REDIS)public RedisCacheManager redisCacheManager() {GenericJackson2JsonRedisSerializer genericJackson2JsonRedisSerializer = new GenericJackson2JsonRedisSerializer();StringRedisSerializer stringRedisSerializer = new StringRedisSerializer();RedisCacheConfiguration config = RedisCacheConfiguration.defaultCacheConfig().entryTtl(cacheProperties.getRedis().getTimeToLive()).serializeKeysWith(RedisSerializationContext.SerializationPair.fromSerializer(stringRedisSerializer)).serializeValuesWith(RedisSerializationContext.SerializationPair.fromSerializer(genericJackson2JsonRedisSerializer));return RedisCacheManager.builder(jedisConnectionFactory()).cacheDefaults(config).build();}
}

redis配置

配置文件

spring:redis:host: 192.168.1.252port: 6379database: 1password: 123456cache:redis:time-to-live: 600s

redisconfig

    /*** jedis连接工厂* @return*/@Beanpublic JedisConnectionFactory jedisConnectionFactory() {RedisStandaloneConfiguration redisStandaloneConfiguration = new RedisStandaloneConfiguration();redisStandaloneConfiguration.setDatabase(redisProperties.getDatabase());redisStandaloneConfiguration.setPort(redisProperties.getPort());redisStandaloneConfiguration.setHostName(redisProperties.getHost());redisStandaloneConfiguration.setPassword(RedisPassword.of(redisProperties.getPassword()));JedisConnectionFactory factory = new JedisConnectionFactory(redisStandaloneConfiguration);return factory;}

redisTemplate

 @Bean(name = "redisTemplate")public RedisTemplate<String, Object> redisTemplate() {RedisTemplate<String, Object> redisTemplate = new RedisTemplate<>();redisTemplate.setConnectionFactory(jedisConnectionFactory());Jackson2JsonRedisSerializer<Object> jackson2JsonRedisSerializer = new Jackson2JsonRedisSerializer<>(Object.class);ObjectMapper objectMapper = new ObjectMapper();GenericJackson2JsonRedisSerializer genericJackson2JsonRedisSerializer = new GenericJackson2JsonRedisSerializer();redisTemplate.setDefaultSerializer(genericJackson2JsonRedisSerializer);objectMapper.setVisibility(PropertyAccessor.ALL, JsonAutoDetect.Visibility.ANY);objectMapper.enableDefaultTyping(ObjectMapper.DefaultTyping.NON_FINAL);jackson2JsonRedisSerializer.setObjectMapper(objectMapper);redisTemplate.setKeySerializer(new StringRedisSerializer());redisTemplate.setHashKeySerializer(new StringRedisSerializer());redisTemplate.setHashValueSerializer(genericJackson2JsonRedisSerializer);redisTemplate.setValueSerializer(genericJackson2JsonRedisSerializer);redisTemplate.afterPropertiesSet();return redisTemplate;}

使用

注入cacheManager，并使用

    @Autowiredprivate CacheManager cacheManager;public void test() {Cache ca = cacheManager.getCache("userCache");ca.put("key", "value");ca.get("key");}

Springboot 集成使用缓存

@Cacheable

注解为 

@Cacheable 标记当前方法， 可将数据缓存与缓存，一般用于查询类方法

    @Cacheable(value = "firm", key = "#id", condition="#id!=null")public FirmBo getFirm(Long id) {return get(id);}

@CacheEvict

销毁缓存，一般用于编辑、新增或删除时候销毁缓存，下次查询时，会重新走数据库

​@CacheEvict(value = "person", key = "#person.id", condition = "#person.id!=null")public PersonBo savePerson(PersonBo person) {save(person);}

redis缓存存储实例