基于springboot2.x集成缓存注解及设置过期时间

添加以下配置信息；

        /**
 * 基于注解添加缓存
 */
@Configuration
@EnableCaching
public class CacheConfig extends CachingConfigurerSupport {

    private final RedisConnectionFactory redisConnectionFactory;

    CacheConfig(RedisConnectionFactory redisConnectionFactory) {
        this.redisConnectionFactory = redisConnectionFactory;
    }

    @Bean
    @Override
    public KeyGenerator keyGenerator() {
        return (o, method, objects) -> {
            StringBuilder sb = new StringBuilder(32);
            sb.append(o.getClass().getSimpleName());
            sb.append(".");
            sb.append(method.getName());
            if (objects.length > 0) {
                sb.append("#");
            }
            String sp = "";
            for (Object object : objects) {
                sb.append(sp);
                if (object == null) {
                    sb.append("NULL");
                } else {
                    sb.append(object.toString());
                }
                sp = ".";
            }
            return sb.toString();
        };
    }

    /**
     * 配置 RedisCacheManager，使用 cache 注解管理 redis 缓存
     */
    @Bean
    @Override
    public CacheManager cacheManager() {
        // 初始化一个RedisCacheWriter
        RedisCacheWriter cacheWriter = RedisCacheWriter.nonLockingRedisCacheWriter(redisConnectionFactory);

        // 设置默认过期时间：30 分钟
        RedisCacheConfiguration defaultCacheConfig = RedisCacheConfiguration.defaultCacheConfig()
                .entryTtl(Duration.ofMinutes(30))
                // .disableCachingNullValues()
                // 使用注解时的序列化、反序列化
                .serializeKeysWith(MyRedisCacheManager.STRING_PAIR)
                .serializeValuesWith(MyRedisCacheManager.FASTJSON_PAIR);

        return new MyRedisCacheManager(cacheWriter, defaultCacheConfig);
    }
}
    

redis配置信息：

        @Configuration
@ConditionalOnClass(RedisOperations.class)
@EnableConfigurationProperties(RedisProperties.class)
@Import({LettuceConnectionConfiguration.class})
public class RedisConfig {

    @Bean
    @ConditionalOnMissingBean(name = "redisTemplate")
    public RedisTemplate<Object, Object> redisTemplate(RedisConnectionFactory redisConnectionFactory) throws UnknownHostException {
        RedisTemplate<Object, Object> template = new RedisTemplate<>();
        // set key serializer
        StringRedisSerializer serializer = MyRedisCacheManager.STRING_SERIALIZER;
        // 设置key序列化类，否则key前面会多了一些乱码
        template.setKeySerializer(serializer);
        template.setHashKeySerializer(serializer);

        // fastjson serializer
        GenericFastJsonRedisSerializer fastSerializer = MyRedisCacheManager.FASTJSON_SERIALIZER;
        template.setValueSerializer(fastSerializer);
        template.setHashValueSerializer(fastSerializer);
        // 如果 KeySerializer 或者 ValueSerializer 没有配置，则对应的 KeySerializer、ValueSerializer 才使用这个 Serializer
        template.setDefaultSerializer(fastSerializer);

        // factory
        template.setConnectionFactory(redisConnectionFactory);
        template.afterPropertiesSet();
        return template;
    }


    @Bean
    @ConditionalOnMissingBean
    public StringRedisTemplate stringRedisTemplate(RedisConnectionFactory redisConnectionFactory) throws UnknownHostException {
        StringRedisTemplate template = new StringRedisTemplate();
        template.setConnectionFactory(redisConnectionFactory);
        return template;
    }

}
    

重写RedisCacheManager：

        public class MyRedisCacheManager extends RedisCacheManager implements ApplicationContextAware, InitializingBean {

    private static final Logger LOGGER = LoggerFactory.getLogger(MyRedisCacheManager.class);

    private ApplicationContext applicationContext;

    private Map<String, RedisCacheConfiguration> initialCacheConfiguration = new LinkedHashMap<>();

    /**
     * key serializer
     */
    public static final StringRedisSerializer STRING_SERIALIZER = new StringRedisSerializer();

    /**
     * value serializer
     * <pre>
     *     使用 FastJsonRedisSerializer 会报错：java.lang.ClassCastException
     *     FastJsonRedisSerializer<Object> fastSerializer = new FastJsonRedisSerializer<>(Object.class);
     * </pre>
     */

    public static final GenericFastJsonRedisSerializer FASTJSON_SERIALIZER = new GenericFastJsonRedisSerializer();

    /**
     * key serializer pair
     */
    public static final RedisSerializationContext.SerializationPair<String> STRING_PAIR = RedisSerializationContext
            .SerializationPair.fromSerializer(STRING_SERIALIZER);
    /**
     * value serializer pair
     */
    public static final RedisSerializationContext.SerializationPair<Object> FASTJSON_PAIR = RedisSerializationContext
            .SerializationPair.fromSerializer(FASTJSON_SERIALIZER);

    public MyRedisCacheManager(RedisCacheWriter cacheWriter, RedisCacheConfiguration defaultCacheConfiguration) {
        super(cacheWriter, defaultCacheConfiguration);
    }

    @Override
    public Cache getCache(String name) {
        Cache cache = super.getCache(name);
        return new RedisCacheWrapper(cache);
    }

    @Override
    public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {
        this.applicationContext = applicationContext;
    }

    @Override
    public void afterPropertiesSet() {
        String[] beanNames = applicationContext.getBeanNamesForType(Object.class);
        for (String beanName : beanNames) {
            final Class clazz = applicationContext.getType(beanName);
            add(clazz);
        }
        super.afterPropertiesSet();
    }

    @Override
    protected Collection<RedisCache> loadCaches() {
        List<RedisCache> caches = new LinkedList<>();
        for (Map.Entry<String, RedisCacheConfiguration> entry : initialCacheConfiguration.entrySet()) {
            caches.add(super.createRedisCache(entry.getKey(), entry.getValue()));
        }
        return caches;
    }

    private void add(final Class clazz) {
        ReflectionUtils.doWithMethods(clazz, method -> {
            ReflectionUtils.makeAccessible(method);
            CacheExpire cacheExpire = AnnotationUtils.findAnnotation(method, CacheExpire.class);
            if (cacheExpire == null) {
                return;
            }
            Cacheable cacheable = AnnotationUtils.findAnnotation(method, Cacheable.class);
            if (cacheable != null) {
                add(cacheable.cacheNames(), cacheExpire);
                return;
            }
            Caching caching = AnnotationUtils.findAnnotation(method, Caching.class);
            if (caching != null) {
                Cacheable[] cs = caching.cacheable();
                if (cs.length > 0) {
                    for (Cacheable c : cs) {
                        if (cacheExpire != null && c != null) {
                            add(c.cacheNames(), cacheExpire);
                        }
                    }
                }
            } else {
                CacheConfig cacheConfig = AnnotationUtils.findAnnotation(clazz, CacheConfig.class);
                if (cacheConfig != null) {
                    add(cacheConfig.cacheNames(), cacheExpire);
                }
            }
        }, method -> null != AnnotationUtils.findAnnotation(method, CacheExpire.class));
    }

    private void add(String[] cacheNames, CacheExpire cacheExpire) {
        for (String cacheName : cacheNames) {
            if (cacheName == null || "".equals(cacheName.trim())) {
                continue;
            }
            long expire = cacheExpire.expire();
            LOGGER.info("cacheName: {}, expire: {}", cacheName, expire);
            if (expire >= 0) {
                // 缓存配置
                RedisCacheConfiguration config = RedisCacheConfiguration.defaultCacheConfig()
                        .entryTtl(Duration.ofSeconds(expire))
                        .disableCachingNullValues()
                        // .prefixKeysWith(cacheName)
                        .serializeKeysWith(STRING_PAIR)
                        .serializeValuesWith(FASTJSON_PAIR);
                initialCacheConfiguration.put(cacheName, config);
            } else {
                LOGGER.warn("{} use default expiration.", cacheName);
            }
        }
    }

    protected static class RedisCacheWrapper implements Cache {
        private final Cache cache;

        RedisCacheWrapper(Cache cache) {
            this.cache = cache;
        }

        @Override
        public String getName() {
            // LOGGER.info("name: {}", cache.getName());
            try {
                return cache.getName();
            } catch (Exception e) {
                LOGGER.error("getName ---> errmsg: {}", e.getMessage(), e);
                return null;
            }
        }

        @Override
        public Object getNativeCache() {
            // LOGGER.info("nativeCache: {}", cache.getNativeCache());
            try {
                return cache.getNativeCache();
            } catch (Exception e) {
                LOGGER.error("getNativeCache ---> errmsg: {}", e.getMessage(), e);
                return null;
            }
        }

        @Override
        public ValueWrapper get(Object o) {
            // LOGGER.info("get ---> o: {}", o);
            try {
                return cache.get(o);
            } catch (Exception e) {
                LOGGER.error("get ---> o: {}, errmsg: {}", o, e.getMessage(), e);
                return null;
            }
        }

        @Override
        public <T> T get(Object o, Class<T> aClass) {
            // LOGGER.info("get ---> o: {}, clazz: {}", o, aClass);
            try {
                return cache.get(o, aClass);
            } catch (Exception e) {
                LOGGER.error("get ---> o: {}, clazz: {}, errmsg: {}", o, aClass, e.getMessage(), e);
                return null;
            }
        }


        @Override
        public <T> T get(Object o, Callable<T> callable) {
            // LOGGER.info("get ---> o: {}", o);
            try {
                return cache.get(o, callable);
            } catch (Exception e) {
                LOGGER.error("get ---> o: {}, errmsg: {}", o, e.getMessage(), e);
                return null;
            }
        }

        @Override
        public void put(Object o, Object o1) {
            // LOGGER.info("put ---> o: {}, o1: {}", o, o1);
            try {
                cache.put(o, o1);
            } catch (Exception e) {
                LOGGER.error("put ---> o: {}, o1: {}, errmsg: {}", o, o1, e.getMessage(), e);
            }
        }

        @Override
        public ValueWrapper putIfAbsent(Object o, Object o1) {
            // LOGGER.info("putIfAbsent ---> o: {}, o1: {}", o, o1);
            try {
                return cache.putIfAbsent(o, o1);
            } catch (Exception e) {
                LOGGER.error("putIfAbsent ---> o: {}, o1: {}, errmsg: {}", o, o1, e.getMessage(), e);
                return null;
            }
        }

        @Override
        public void evict(Object o) {
            // LOGGER.info("evict ---> o: {}", o);
            try {
                cache.evict(o);
            } catch (Exception e) {
                LOGGER.error("evict ---> o: {}, errmsg: {}", o, e.getMessage(), e);
            }
        }

        @Override
        public void clear() {
            // LOGGER.info("clear");
            try {
                cache.clear();
            } catch (Exception e) {
                LOGGER.error("clear ---> errmsg: {}", e.getMessage(), e);
            }
        }
    }
}
    

应用：

        @GetMapping("/getShopByShopNO/{shopNo}")
public Mono<ShopDO> getShopByShopNO(@PathVariable("shopNo") final String shopNo){
    final ShopDO shopByShopNO = shopDAO.getShopByShopNO(shopNo);
    return Mono.just(shopByShopNO);
}

/**
 * 查询店铺详情
 * @param shopNo
 * @return
*/
@Cacheable(value = "shop",key = "'shop_'.concat(#root.args[0])",sync = true)
@CacheExpire(30)
ShopDO getShopByShopNO(String shopNo);
    

参考：https://www.cnblogs.com/wjwen/p/9301119.html

原文：https://www.cnblogs.com/hujinshui/p/11341564.html