springboot整合redis

1、加入redis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、编写redis配置类

/**
 * author LiQinZhen
 * date 2020/10/13
 * description: resdis配置类
 */
@Configuration
@EnableCaching
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、在相关的方法上面添加注解

@Service
public class CrmBannerServiceImpl extends ServiceImpl<CrmBannerMapper, CrmBanner> implements CrmBannerService {
    //查询所有Banner
    @Cacheable(key="'selectIndexList'",value="banner")
    @Override
    public List<CrmBanner> selectAllBanner() {
        QueryWrapper<CrmBanner> wrapper = new QueryWrapper<>();
        //根据id降序排序
        wrapper.orderByDesc("id");
        //用last拼接sql语句
        wrapper.last("limit 2");
        List<CrmBanner> list = baseMapper.selectList(null);
        return list;
    }
}

4、application.properties中加入redis相关配置

# Redis数据库索引（默认为0） 

spring.redis.database=0 

# Redis服务器地址 

spring.redis.host=127.0.0.1

# Redis服务器连接端口 

spring.redis.port=6379 

# Redis服务器连接密码（默认为空） 

spring.redis.password= 

# 连接池最大连接数（使用负值表示没有限制） 

spring.redis.pool.max-active=200 

# 连接池最大阻塞等待时间（使用负值表示没有限制） 

spring.redis.pool.max-wait=-1 

# 连接池中的最大空闲连接 

spring.redis.pool.max-idle=10

# 连接池中的最小空闲连接 

spring.redis.pool.min-idle=0 

# 连接超时时间（毫秒） 

spring.redis.timeout=1000