# springboot-07-cache

**Repository Path**: mjkapps/springboot-07-cache

## Basic Information

- **Project Name**: springboot-07-cache
- **Description**: 简单springboot与缓存操作
- **Primary Language**: Unknown
- **License**: Not specified
- **Default Branch**: master
- **Homepage**: None
- **GVP Project**: No

## Statistics

- **Stars**: 0
- **Forks**: 0
- **Created**: 2019-02-14
- **Last Updated**: 2020-12-19

## Categories & Tags

**Categories**: Uncategorized

**Tags**: None

## README

# springboot-07-cache

#### 介绍
简单springboot2.x+cache+reids

#### 操作
整合redis,redis是一个开源(BSD许可的),内存中的数据结构存储系统,它可以用作数据库,缓存和消息中间件
原理: CacheManager===Cache 缓存组件来实际给缓存中存取数据
1.引入redis的starter,容器中保存的是RedisCacheManager
2.RedisCacheManager帮我们创建redisCache来作为缓存组件
3.默认保存数据k-v 都是Object,利用序列化保存,那如何保存为json

```
    private Duration timeToLive = Duration.ZERO;
    public void setTimeToLive(Duration timeToLive) {
        this.timeToLive = timeToLive;
    }

    @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）
        RedisCacheConfiguration config = RedisCacheConfiguration.defaultCacheConfig()
                .entryTtl(timeToLive)
                .serializeKeysWith(RedisSerializationContext.SerializationPair.fromSerializer(redisSerializer))
                .serializeValuesWith(RedisSerializationContext.SerializationPair.fromSerializer(jackson2JsonRedisSerializer))
                .disableCachingNullValues();

        RedisCacheManager cacheManager = RedisCacheManager.builder(factory)
                .cacheDefaults(config)
                .build();
        return cacheManager;
    }
```