redis通用配置类的使用详解

package com.htb.beidawebspringboot10redis.config;

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;

import java.net.UnknownHostException;
import java.text.SimpleDateFormat;

/**
 * @Description:Redis通用配置类
 * @Author 16221
 * @Date 2020/4/23
 **/
@Configuration
public class RedisConfig {
    @Bean
    //不指定id的话bean 的id就是方法名
    //返回结果就是spring中管理的bean
    public RedisTemplate<Object, Object> redisTemplate(RedisConnectionFactory redisConnectionFactory)
            throws UnknownHostException {
        RedisTemplate<Object, Object> template = new RedisTemplate<>();

        //ObjectMapper 指定在转成json的时候的一些转换规则
        ObjectMapper objectMapper = new ObjectMapper();
        objectMapper.setDateFormat(new SimpleDateFormat("yyyy-MM-dd HH:mm:ss"));

        template.setConnectionFactory(redisConnectionFactory);
        Jackson2JsonRedisSerializer jackson2JsonRedisSerializer = new Jackson2JsonRedisSerializer(Object.class);
        //把自定义objectMapper设置到jackson2JsonRedisSerializer中（可以不设置，使用默认规则）
        jackson2JsonRedisSerializer.setObjectMapper(objectMapper);

        //RedisTemplate默认的序列化方式使用的是JDK的序列化
        //设置了key的序列化方式
        template.setKeySerializer(new StringRedisSerializer());
        //设置了value的序列化方式
        template.setValueSerializer(jackson2JsonRedisSerializer);
        return template;
    }
}