SpringBoot整合Redis

jedis:采用直连，多个线程操作是不安全的，为了安全起见可以使用jedis pool，更像BIO模式

lettuce：采用netty，实例可以在多个线程中进行共享，不存在线程不安全的情况，更像NIO模式

==SpringBoot 2.0之后默认采用lettuce==

源码：

public class RedisAutoConfiguration {

    @Bean
    @ConditionalOnMissingBean(name = "redisTemplate") //可以自定义redisTemplate
    @ConditionalOnSingleCandidate(RedisConnectionFactory.class)
    public RedisTemplate<Object, Object> redisTemplate(RedisConnectionFactory redisConnectionFactory) {
        //默认的RedisTemplate没有过多的设置，redis对象都需要序列化
        //两个泛型都是<Object,Object>，使用时需要强转为<String,Object>
        RedisTemplate<Object, Object> template = new RedisTemplate<>();
        template.setConnectionFactory(redisConnectionFactory);
        return template;
    }

    @Bean
    @ConditionalOnMissingBean //由于String是redis中的常用类型，所以将其单独列出注册到Spring容器中
    @ConditionalOnSingleCandidate(RedisConnectionFactory.class)
    public StringRedisTemplate stringRedisTemplate(RedisConnectionFactory redisConnectionFactory) {
        StringRedisTemplate template = new StringRedisTemplate();
        template.setConnectionFactory(redisConnectionFactory);
        return template;
    }

自定义RedisTemplate

package com.sw.config;

import com.fasterxml.jackson.annotation.JsonAutoDetect;
import com.fasterxml.jackson.annotation.PropertyAccessor;
import com.fasterxml.jackson.databind.ObjectMapper;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
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.StringRedisSerializer;

/**
 * @Author suaxi
 * @Date 2021/1/2 14:24
 */

@Configuration
public class RedisConfig {

    //自定义RedisTemplate
    @Bean
    @SuppressWarnings("all")
    public RedisTemplate<String, Object> redisTemplate(RedisConnectionFactory factory) {
        RedisTemplate<String, Object> template = new RedisTemplate<>();
        template.setConnectionFactory(factory);

        //Json序列化配置
        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);

        //String序列化
        StringRedisSerializer stringRedisSerializer = new StringRedisSerializer();

        //key采用String的形式序列化
        template.setKeySerializer(stringRedisSerializer);
        //hash采用String的形式序列化
        template.setHashKeySerializer(stringRedisSerializer);
        //value序列化方式采用jackson
        template.setValueSerializer(jackson2JsonRedisSerializer);
        //hash的value序列化方式采用jackson
        template.setHashValueSerializer(jackson2JsonRedisSerializer);
        template.afterPropertiesSet();

        return template;
    }
}