在SpringBoot项目中应用RedisCache功能

本文主要是介绍在SpringBoot项目中应用RedisCache功能，希望对大家解决编程问题提供一定的参考价值，需要的开发者们随着小编来一起学习吧！

1.application.yaml中添加cache配置

spring:cache:type: redisredis:time-to-live: 72000000key-prefix: 'redis:cache:'use-key-prefix: truecache-null-values: true

2.封装RedisCache配置类

@EnableConfigurationProperties(CacheProperties.class)
@Configuration
@EnableCaching
public class RedisCacheConfig {@Beanpublic RedisCacheConfiguration redisCacheConfiguration(CacheProperties cacheProperties) {RedisCacheConfiguration config = RedisCacheConfiguration.defaultCacheConfig();// config = config.entryTtl();config = config.serializeKeysWith(RedisSerializationContext.SerializationPair.fromSerializer(new StringRedisSerializer()));config = config.serializeValuesWith(RedisSerializationContext.SerializationPair.fromSerializer(new GenericJackson2JsonRedisSerializer()));CacheProperties.Redis redisProperties = cacheProperties.getRedis();//将配置文件中所有的配置都生效if (redisProperties.getTimeToLive() != null) {config = config.entryTtl(redisProperties.getTimeToLive());}if (redisProperties.getKeyPrefix() != null) {config = config.computePrefixWith(cacheName -> redisProperties.getKeyPrefix() + cacheName);}if (!redisProperties.isCacheNullValues()) {config = config.disableCachingNullValues();}if (!redisProperties.isUseKeyPrefix()) {config = config.disableKeyPrefix();}return config;}
}

3.封装RedisCache缓存Key生成器

/*** @ClassName redisCacheKeyGenerator* @description: Redis缓存key 生成策略*/
@Slf4j
@Component("redisCacheKeyGenerator")
public class RedisCacheKeyGenerator implements KeyGenerator {private final static int NO_PARAM_KEY = 0;public static final char SP = ':';@Autowired(required = false)private CacheManager cacheManager;@PostConstructpublic void init() {log.info("cacheManager：{}",cacheManager);}@Overridepublic Object generate(Object target, Method method, Object... parameters) {StringBuilder strBuilder = new StringBuilder(30);// 类名strBuilder.append(SP);// 方法名strBuilder.append(method.getName());strBuilder.append(SP);if (parameters.length > 0) {// 参数值for (Object object : parameters) {if (isSimpleValueType(object.getClass())) {strBuilder.append(object);} else {strBuilder.append(JSONUtil.toJsonStr(object).hashCode());}}} else {strBuilder.append(NO_PARAM_KEY);}log.info("生成缓存序列：{}",strBuilder);return strBuilder.toString();}/*** 判断是否是简单值类型.包括：基础数据类型、CharSequence、Number、Date、URL、URI、Locale、Class;** @param clazz* @return*/public static boolean isSimpleValueType(Class<?> clazz) {return (ClassUtils.isPrimitiveOrWrapper(clazz) || clazz.isEnum() || CharSequence.class.isAssignableFrom(clazz)|| Number.class.isAssignableFrom(clazz) || Date.class.isAssignableFrom(clazz) || URI.class == clazz|| URL.class == clazz || Locale.class == clazz || Class.class == clazz);}}

4.Service类中应用RedisCache

@Service
@CacheConfig(cacheNames = "productAlbum",keyGenerator = "redisCacheKeyGenerator")
public class ProductAlbumServiceImpl extends ServiceImpl<ProductAlbumMapper, ProductAlbum> implements IProductAlbumService {@Override@Transactional(rollbackFor = Exception.class)@Caching(evict = {@CacheEvict(key = "':getAlbumPics_'+#productSn"),@CacheEvict(key = "':getAlbumPicsBySn_'+#productSn")})public void saveAlbumPics(String productSn, String pic) {// 业务代码}@Override@Caching(evict = {@CacheEvict(key = "':getAlbumPics_'+#productSn"),@CacheEvict(key = "':getAlbumPicsBySn_'+#productSn")})public void doAlbumPics(String productSn,List<ProductAlbumResp> albumList) {// 业务代码}@Override@Cacheable(key = "':getAlbumPics_'+#productSn")public String getAlbumPics(String productSn) {// 业务代码}@Override@Cacheable(key = "':getAlbumPicsBySn_'+#productSn")public List<ProductAlbumResp> getAlbumPicsBySn(String productSn) {// 业务代码}@Override@Caching(evict = {@CacheEvict(key = "':getAlbumPics_'+#productSn"),@CacheEvict(key = "':getAlbumPicsBySn_'+#productSn")})public void saveAlbumPicsByNotExist(String productSn, String pic) {// 业务代码}
}

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