springboot2.x怎么集成缓存注解及设置过期时间

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添加以下配置信息；

/** * 基于注解添加缓存 */@Configuration@EnableCachingpublic 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