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 redisTemplate(RedisConnectionFactory redisConnectionFactory) throws UnknownHostException {
        RedisTemplate 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 initialCacheConfiguration = new LinkedHashMap<>();

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

    /**
     * value serializer
     * 
     *     使用 FastJsonRedisSerializer 会报错：java.lang.ClassCastException
     *     FastJsonRedisSerializer