RedisConfig.java--开启缓存支持，配置RedisTemplate，缓存到java虚拟机而非Redis，redis支持缓存过期时间，redis指定缓存超时时间

分手后的思念是犯贱 2022-11-28 10:42 163阅读 0赞

@Configuration
    @EnableCaching  //开启缓存支持
    public class RedisConfig extends CachingConfigurerSupport{
        @Resource
        private LettuceConnectionFactory lettuceConnectionFactory;
        
        //@description 自定义的缓存key的生成策略，若想使用这个key 只需要将注解上keyGenerator的值设置为keyGenerator即可
        @Override
        @Bean
        public KeyGenerator keyGenerator(){
            return new KeyGenetator(){
                @Override
                public Object generate(Object target,Method method,Object... params){
                    StringBuffer sb = new StringBuffer();
                    sb.append(target.getClass().getName());
                    sb.append(method.getName());
                    for(Object obj: params){
                           sb.append(obj.toString());
                    }
                    return sb.toString();
                }
            };
        }
        //RedisTemplate配置
        @Beam
        public RedisTemplate<String,Obejct> redisTemplate(LettuceConnectionFactory lettuceConnectionFactory){
            //设置序列化
            Jackson2JsonRedisSerializer<Object> jackson2JsonRedisSerializer = new Jackson2JsonRedisSerializer<>(Object.class);
            ObjectMapper om = new ObjectMapper();
            om.setVisibility(PropertyAccessor.ALL,Visiblety.ANY);
            om.enableDefaultTyping(DefaultTyping.NON_FINAL);
            jsckson2JsonRedisSerializer.setObjectMapper(om);
            //配置redisTemplate
            ReidsTemplate<String,Object> redisTemplate = new RedisTemplate<>();
            redisTemplate.setConnectionFactory(LettuceConnectionFactory);
            RedisSerializer<?> stringSerializer = new StringRedisSerializer();
            redisTemplate.setKeySerializer(StringSerializer);//key序列化
            redisTemplate.setValueSerializer(jackson2JsonRedisSerializer); //value序列化
            redisTemplate.setHashKeySerializer(stringSerializer);//Hash key序列化
            redisTemplate.setHashValueSerializer(jackson2JsonRedisSerializer); //hash value 序列化
            return redisTemplate;
        }
        //此处的缓存到java虚拟机内存，非redis
        @Override
        @Bean
        public CacheManager cacheManager(){
            SimpleCacheManager cacheManager = new SimpleCacheManager();
            List<ConcurrentMapCache> list = new ArrayList<>();
            list.add(new ConcurrentMapCache(name:"dictCache"));
            list.add(new ConcurrentMapCache(name:"jeecgDemo"));
            list.add(new ConcurrentMapCache(name:"permission"));
            cacheManager.setCaches(list);
            cacheManager.afterPropertiesSet();
            return cacheManager;
        }
        //redis缓存支持设置缓存过期事件
        @Bean
        public RedisCacheManager redisCacheManager(RedisConnectionFactory redisConnectionFactory){
            return new RedisCacheManager(
               RedisCacheWriter.nonLockingRedisCacheWriter(redisConnectionFactory),
               this.getRedisCacheConfigurationWithTt1(second:3600),//3600秒，默认策略，未配置的key会使用这个
                this.getRdisCacheConfigurationMap() //指定key 策略
             );
        }
        //指定redis缓存超时时间
        private Map<String,RedisChcheConfiguration> getRedisCacheConfigruationMap(){
            Map<Stirng,RedisCacheConfiguration> redisCacheConfigurationMap = new
            HashMap<>();
            redisCacheConfigurationMap.put("dictTableCache",this.getRedisCacheConfigurationWithTt1(seconds:600));//600秒表数据字典只缓存10分钟
            return redisCacheConfigurationMap;
        }
        private RedisCacheConfiguration getRedisCacheConfigurationWithTt1(Integet seconds){
               Jackson2JsonRedisSerializer<Object> jackson2JsonRedisSerializer = new Jackson2JsonRedisSerializer<>(Object.class);
                ObjectMapper om = new ObjectMapper();
                om.setVisibility(PropertyAccessor.ALL,JsonAutoDetect.Visibility.ANY);
                om.enableDefaultTyping(ObjectMapper.DefaultTyping.NON_FINAL);
                jackson2JsonRedisSerializer.setObjectMapper(om);
                
                RedisCacheConfiguration redisCacheConfiguration = RedisCacheConfiguration.defaultCacheConfig();
                redisCacheConfiguration = redisCacheConfiguration.serializeValuesWith(RedisSerializationContext.SerializationPair.fromSerializer(jackson2JsonRedisSerializer)).entryTtl(Duration.ofSeconds(seconds));
                return redisCacheConfiguration; 
        }
    
    }

记事本纯手写，应该有很多不对的地方；