1，在啟動類Application中增加注解@EnableCaching

2，待緩存的方法上方增加@Cacheable注解

@Cacheable(cacheNames = redisContains.REDIS_SHOW_TEXT,key = "#bodyParams.getString('textCode')")

這其中，key即接收參數中的某個數據，例如：

若方法的接收參數為JSONObject?bodyParams? ?則key的值可以寫為key = "#bodyParams.getString('textCode')"。

若接收參數為：SysDictData dictData 則key的值可以寫為：key = "#dictData.beginTime"

若接收參數為：String id? 則key的值可以寫為：key="#id"

3，目前是無法設置過期時間的

期望能達到此效果，設置#30，可以設置30秒過期時間，方式如下：

3.1，創建RedisConfigCacheManager類

import lombok.extern.slf4j.Slf4j; import org.apache.commons.lang3.StringUtils; import org.springframework.data.redis.cache.*; import org.springframework.data.redis.serializer.GenericJackson2JsonRedisSerializer; import org.springframework.data.redis.serializer.RedisSerializationContext;import java.time.Duration;/*** redis 配置類*/ @Slf4j public class RedisConfigCacheManager extends RedisCacheManager {public RedisConfigCacheManager(RedisCacheWriter cacheWriter, RedisCacheConfiguration defaultCacheConfiguration) {super(cacheWriter, defaultCacheConfiguration);}private static final RedisSerializationContext.SerializationPair<Object> DEFAULT_PAIR = RedisSerializationContext.SerializationPair.fromSerializer(new GenericJackson2JsonRedisSerializer());private static final CacheKeyPrefix DEFAULT_CACHE_KEY_PREFIX = cacheName -> cacheName+":";@Overrideprotected RedisCache createRedisCache(String name, RedisCacheConfiguration cacheConfig) {final int lastIndexOf = StringUtils.lastIndexOf(name, '#');if (lastIndexOf > -1) {final String ttl = StringUtils.substring(name, lastIndexOf + 1);final Duration duration = Duration.ofSeconds(Long.parseLong(ttl));cacheConfig = cacheConfig.entryTtl(duration);//修改緩存key和value值的序列化方式cacheConfig = cacheConfig.computePrefixWith(DEFAULT_CACHE_KEY_PREFIX).serializeValuesWith(DEFAULT_PAIR);final String cacheName = StringUtils.substring(name, 0, lastIndexOf);return super.createRedisCache(cacheName, cacheConfig);}else{//修改緩存key和value值的序列化方式cacheConfig = cacheConfig.computePrefixWith(DEFAULT_CACHE_KEY_PREFIX).serializeValuesWith(DEFAULT_PAIR);return super.createRedisCache(name, cacheConfig);}}}

3.2，創建CacheConfig類

import com.fasterxml.jackson.annotation.JsonAutoDetect; import com.fasterxml.jackson.annotation.PropertyAccessor; import com.fasterxml.jackson.databind.ObjectMapper; import org.springframework.cache.CacheManager; import org.springframework.context.annotation.Bean; import org.springframework.context.annotation.Configuration; import org.springframework.data.redis.cache.RedisCacheConfiguration; import org.springframework.data.redis.cache.RedisCacheWriter; import org.springframework.data.redis.connection.RedisConnectionFactory; import org.springframework.data.redis.serializer.Jackson2JsonRedisSerializer; import org.springframework.data.redis.serializer.RedisSerializationContext; import org.springframework.data.redis.serializer.RedisSerializer; import org.springframework.data.redis.serializer.StringRedisSerializer;import java.time.Duration;@Configuration public class CacheConfig {@Beanpublic CacheManager cacheManager(RedisConnectionFactory redisConnectionFactory) {ObjectMapper om = new ObjectMapper();RedisSerializer<String> redisSerializer = new StringRedisSerializer();Jackson2JsonRedisSerializer<Object> jackson2JsonRedisSerializer = new Jackson2JsonRedisSerializer<>(Object.class);// 解決查詢緩存轉換異常的問題om.setVisibility(PropertyAccessor.ALL, JsonAutoDetect.Visibility.ANY);om.enableDefaultTyping(ObjectMapper.DefaultTyping.NON_FINAL);jackson2JsonRedisSerializer.setObjectMapper(om);// 配置序列化（解決亂碼的問題）RedisCacheConfiguration config = RedisCacheConfiguration.defaultCacheConfig().entryTtl(Duration.ofMillis(-1)).serializeKeysWith(RedisSerializationContext.SerializationPair.fromSerializer(redisSerializer)).serializeValuesWith(RedisSerializationContext.SerializationPair.fromSerializer(jackson2JsonRedisSerializer)).disableCachingNullValues();RedisCacheWriter cacheWriter = RedisCacheWriter.nonLockingRedisCacheWriter(redisConnectionFactory);return new RedisConfigCacheManager(cacheWriter, config);}}

至此，即可實現，加上#30可以實現30秒緩存，不加#即-1不限時間緩存。

參考：https://www.cnblogs.com/mrsans/articles/14113591.html

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