1，在启动类Application中增加注解@EnableCaching
2，待缓存的方法上方增加@Cacheable注解
@Cacheable(cacheNames = redisContains.REDIS_SHOW_TEXT,key = "#bodyParams.getString('textCode')")这其中，key即接收参数中的某个数据，例如：
若方法的接收参数为JSONObject bodyParams 则key的值可以写为key = "#bodyParams.getString('textCode')"。
若接收参数为：SysDictData dictData 则key的值可以写为：key = "#dictData.beginTime"
若接收参数为：String id 则key的值可以写为：key="#id"
3，目前是无法设置过期时间的
期望能达到此效果，设置#30，可以设置30秒过期时间，方式如下：
3.1，创建RedisConfigCacheManager类
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 配置类
*/
@Slf4j
public class RedisConfigCacheManager extends RedisCacheManager {
public RedisConfigCacheManager(RedisCacheWriter cacheWriter, RedisCacheConfiguration defaultCacheConfiguration) {
super(cacheWriter, defaultCacheConfiguration);
}
private static final RedisSerializationContext.SerializationPair
.fromSerializer(new GenericJackson2JsonRedisSerializer());
private static final CacheKeyPrefix DEFAULT_CACHE_KEY_PREFIX = cacheName -> cacheName+":";
@Override
protected 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);
//修改缓存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{
//修改缓存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，创建CacheConfig类
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 {
@Bean
public CacheManager cacheManager(RedisConnectionFactory redisConnectionFactory) {
ObjectMapper om = new ObjectMapper();
RedisSerializer
Jackson2JsonRedisSerializer
Object.class);
// 解决查询缓存转换异常的问题
om.setVisibility(PropertyAccessor.ALL, JsonAutoDetect.Visibility.ANY);
om.enableDefaultTyping(ObjectMapper.DefaultTyping.NON_FINAL);
jackson2JsonRedisSerializer.setObjectMapper(om);
// 配置序列化（解决乱码的问题）
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，即可实现，加上#30可以实现30秒缓存，不加#即-1不限时间缓存。
参考：https://www.cnblogs.com/mrsans/articles/14113591.html————————————————
原文链接：https://blog.csdn.net/lpping90/article/details/117522239