一、导入Jar包
org.springframework.boot spring-boot-starter-data-redis
org.springframework.boot spring-boot-start-cache
二、配置文件
package com.liangjian.config;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.cache.annotation.CachingConfigurerSupport;import org.springframework.cache.annotation.EnableCaching;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.RedisCacheManager;import org.springframework.data.redis.connection.RedisConnectionFactory;import org.springframework.data.redis.core.RedisTemplate;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;/** * reids配置类 */@Configuration@EnableCachingpublic class RedisConfig extends CachingConfigurerSupport{ @Bean public RedisTemplateredisTemplate(RedisConnectionFactory factory) { RedisTemplate redisTemplate = new RedisTemplate<>(); redisTemplate.setConnectionFactory(factory); // 使用Jackson2JsonRedisSerialize 替换默认序列化 Jackson2JsonRedisSerializer jackson2JsonRedisSerializer = new Jackson2JsonRedisSerializer(Object.class); ObjectMapper objectMapper = new ObjectMapper(); objectMapper.setVisibility(PropertyAccessor.ALL, JsonAutoDetect.Visibility.ANY); objectMapper.enableDefaultTyping(ObjectMapper.DefaultTyping.NON_FINAL); jackson2JsonRedisSerializer.setObjectMapper(objectMapper); // 设置value的序列化规则和 key的序列化规则 redisTemplate.setKeySerializer(new StringRedisSerializer()); redisTemplate.setValueSerializer(jackson2JsonRedisSerializer); redisTemplate.setHashKeySerializer(new StringRedisSerializer()); redisTemplate.setHashValueSerializer(jackson2JsonRedisSerializer); redisTemplate.afterPropertiesSet(); return redisTemplate; } @Bean public CacheManager cacheManager(RedisConnectionFactory factory) { RedisSerializer redisSerializer = new StringRedisSerializer(); Jackson2JsonRedisSerializer jackson2JsonRedisSerializer = new Jackson2JsonRedisSerializer(Object.class); //解决查询缓存转换异常的问题 ObjectMapper om = new ObjectMapper(); 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),过期时间30秒 RedisCacheConfiguration config = RedisCacheConfiguration.defaultCacheConfig() .entryTtl(Duration.ofSeconds(1800000)) .serializeKeysWith(RedisSerializationContext.SerializationPair.fromSerializer(redisSerializer)) .serializeValuesWith(RedisSerializationContext.SerializationPair.fromSerializer(jackson2JsonRedisSerializer)) .disableCachingNullValues(); RedisCacheManager cacheManager = RedisCacheManager.builder(factory) .cacheDefaults(config) .build(); return cacheManager; }}
三、application.yml 添加以下配置
spring:## Redis 配置## Redis数据库索引(默认为0) redis: database: 0 ## Redis服务器地址 host: 127.0.0.1 ## Redis服务器连接端口 port: 6379 ## Redis服务器连接密码(默认为空) password: ## 连接超时时间(毫秒) # timeout: 1800000 ## 连接池最大连接数(使用负值表示没有限制) jedis: pool: max-active: 8 ## 连接池最大阻塞等待时间(使用负值表示没有限制) max-wait: -1 ## 连接池中的最大空闲连接 max-idle: 8 ## 连接池中的最小空闲连接 min-idle: 0
四、在方法上使用@Cacheable(value = "MyRedis"/*上一级包名*/, key = "redis")进行添加缓存
(方法必须有返回值,返回值就是存入Redis的数据)
五、删除缓存:
方法一:删除指定Key
@Caching(evict = { @CacheEvict(value = "MyRedis",key=“redis”) }) 方法二:删除指定文件下(value值)所有的Key
@Caching(evict = { @CacheEvict(value = "MyRedis",allEntries=true/*表示删除MyRedis文件下所有的缓存*/) }) 六、有时候通过注解方式无法满足需求,可以使用RedisTemplate对象进行存储,关键代码如下:
//获取redisTemplate对象 @Autowired private RedisTemplate redisTemplate;//新增 参数分别为:Key名、存入的数据、过期时间、过期时间的类型(TimeUnit.SECONDS 是以秒计算)redisTemplate.opsForValue().set(“token”,admins,1800, TimeUnit.SECONDS); //获取 参数:Key值
redisTemplate.opsForValue().get(“token”) //删除 参数:Key值
redisTemplate.delete("token");