1、在common模块添加依赖
由于redis缓存是公共应用，所以我们把依赖与配置添加到了common模块下面，在common模块pom.xml下添加以下依赖
<!-- redis --> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-data-redis</artifactId> </dependency> <!--//spring2.X集成redis所需common-pool2--> <dependency> <groupId>org.apache.commons</groupId> <artifactId>commons-pool2</artifactId> <version>2.6.0</version> </dependency>
2、在service-base模块添加redis配置类
package com.wang.servicebase; 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; @EnableCaching @Configuration public class RedisConfig extends CachingConfigurerSupport { @Bean public RedisTemplate<String, Object> redisTemplate(RedisConnectionFactory factory) { RedisTemplate<String, Object> template = new RedisTemplate<>(); RedisSerializer<String> redisSerializer = new StringRedisSerializer(); Jackson2JsonRedisSerializer jackson2JsonRedisSerializer = new Jackson2JsonRedisSerializer(Object.class); ObjectMapper om = new ObjectMapper(); om.setVisibility(PropertyAccessor.ALL, JsonAutoDetect.Visibility.ANY); om.enableDefaultTyping(ObjectMapper.DefaultTyping.NON_FINAL); jackson2JsonRedisSerializer.setObjectMapper(om); template.setConnectionFactory(factory); //key序列化方式 template.setKeySerializer(redisSerializer); //value序列化 template.setValueSerializer(jackson2JsonRedisSerializer); //value hashmap序列化 template.setHashValueSerializer(jackson2JsonRedisSerializer); return template; } @Bean public CacheManager cacheManager(RedisConnectionFactory factory) { RedisSerializer<String> 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600秒 RedisCacheConfiguration config = RedisCacheConfiguration.defaultCacheConfig() .entryTtl(Duration.ofSeconds(600)) .serializeKeysWith(RedisSerializationContext.SerializationPair.fromSerializer(redisSerializer)) .serializeValuesWith(RedisSerializationContext.SerializationPair.fromSerializer(jackson2JsonRedisSerializer)) .disableCachingNullValues(); RedisCacheManager cacheManager = RedisCacheManager.builder(factory) .cacheDefaults(config) .build(); return cacheManager; } }
3.在service-cms模块配置文件添加redis配置
#redis配置 spring.redis.host=8.140.124.212 spring.redis.port=6379 spring.redis.database=0 spring.redis.password=123456 spring.redis.timeout=1800000 spring.redis.lettuce.pool.max-active=20 spring.redis.lettuce.pool.max-wait=-1 #最大阻塞等待时间(负数表示没限制) spring.redis.lettuce.pool.max-idle=5 spring.redis.lettuce.pool.min-idle=0
4、在接口中添加redis缓存
4.1在主启动类上添加注解@EnableCaching
4.2修改CrmBannerServiceImpl实现类，添加redis缓存注解
@Cacheable
|
属性/方法名 |
解释 |
|
value |
缓存名，必填，它指定了你的缓存存放在哪块命名空间 |
|
cacheNames |
与 value 差不多，二选一即可 |
|
key |
可选属性，可以使用 SpEL 标签自定义缓存的key |
根据方法对其返回结果进行缓存，下次请求时，如果缓存存在，则直接读取缓存数据返回；如果缓存不存在，则执行方法，并把返回的结果存入缓存中。一般用在查询方法上。
@Override @Cacheable(key = "‘selectIndexList‘",value = "banner") public List<CrmBanner> selectAllBaners() { QueryWrapper<CrmBanner> queryWrapper = new QueryWrapper<>(); queryWrapper.orderByDesc("id"); queryWrapper.last("limit 2"); List<CrmBanner> list = baseMapper.selectList(queryWrapper); return list; }
4.3 启动redis服务
注：
连接redis服务可能遇到的问题
关闭liunx防火墙
找到redis配置文件， 注释一行配置
如果出现下面错误提示
修改 protected-mode yes
改为
protected-mode no