Spring RedisTemplate:将多个Model类序列化为JSON。需要使用多个RedisTemplates吗? [英] Spring RedisTemplate : Serialise multiple Model classes into JSON.Need to use Multiple RedisTemplates?
问题描述
我正在使用Spring Redis支持在Redis中保存我的对象。
I am using Spring Redis support to save my objects in Redis.
我有几个处理不同Model类的DAO:
I have several DAOs which handle different Model classes :
例如:'ShopperHistoryDao'将保存/检索'ShopperHistoryModel'
'ShopperItemHistoryDao'的对象,它将处理'ItemHistoryModel'的对象
eg : 'ShopperHistoryDao' which will save/retrieve objects of 'ShopperHistoryModel' 'ShopperItemHistoryDao' which will handle objects of 'ItemHistoryModel'
我想使用'JacksonJsonRedisSerializer'将对象序列化/反序列化为json。
I want to use 'JacksonJsonRedisSerializer' to serialise/deserialize my objects to/from json.
但是在JacksonJsonRedisSerializer的构造函数中,它需要一个特定的Model类。
But in the constructor of JacksonJsonRedisSerializer, it takes one specific Model class.
JacksonJsonRedisSerializer(Class<T> type)
这是否意味着,我必须为每个不同的Model类配置单独的RedisTemplates并在适当的DAO实现中使用它们?
Does that mean, I have to configure separate RedisTemplates for each different Model class and use them in appropriate DAO implementation?
类似于:
<bean id="redisTemplateForShopperHistoryModel" class="org.springframework.data.redis.core.RedisTemplate">
<property name="connectionFactory" ref="jedisConnectionFactory" />
<property name="valueSerializer">
<bean id="redisJsonSerializer"
class="org.springframework.data.redis.serializer.JacksonJsonRedisSerializer">
<constructor-arg type="java.lang.Class" value="ShopperHistoryModel.class"/>
</bean>
</property>
</bean>
<bean id="redisTemplateForItemHistoryModel" class="org.springframework.data.redis.core.RedisTemplate">
<property name="connectionFactory" ref="jedisConnectionFactory" />
<property name="valueSerializer">
<bean id="redisJsonSerializer"
class="org.springframework.data.redis.serializer.JacksonJsonRedisSerializer">
<constructor-arg type="java.lang.Class" value="ItemHistoryModel.class"/>
</bean>
</property>
</bean>
推荐答案
GenericJackson2JsonRedisSerializer 应该完成这项工作
@Bean
public RedisTemplate<String, Object> redisTemplate() {
RedisTemplate<String, Object> redisTemplate = new RedisTemplate<String, Object>();
redisTemplate.setConnectionFactory(jedisConnectionFactory());
redisTemplate.setKeySerializer(new StringRedisSerializer());
redisTemplate.setValueSerializer(new GenericJackson2JsonRedisSerializer());
return redisTemplate;
}
这会将 @Class 属性添加到JSON了解类型,这有助于Jackson反序列化,因此无需在配置类上显式映射模型。
This will add @Class property to the JSON to understand the type, which helps Jackson to deserialize, so no need to explicitly map the model on the configuration class.
"{\"@class\":\"com.prnv.model.WhitePaper\",\"title\":\"Hey\",\"author\":{\"@class\":\"com.prnv.model.Author\",\"name\":\"Hello\"},\"description\":\"Description\"}"
在服务中,您可以使用
@Cacheable(value = "whitePaper", key = "#title")
public WhitePaper findWhitePaperByTitle(String title)
{
WhitePaper whitePaper = repository.findByTitle(title);
return whitePaper;
}
查看这篇文章: http://blog.pranavek.com/2016/12/25/integrating-redis-with-spring-申请
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