在web开发中缓存是我们应对高并发不可或缺的一部分，其中Redis也是缓存的最佳解决方法。

本章介绍SpringBoot中使用Redis的方法。

1. 添加Redis依赖

<dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-data-redis</artifactId>
</dependency>

2. 添加Redis配置参数

spring.redis.host=localhost
spring.redis.port=6379
#Redis的密码，不使用密码请注解
#spring.redis.password=123456

3. RedisTemplate配置类

由于RedisTemplate存储的是二进制不方便查阅，所以我们需要配置类对其进行转换一下。代码如下：

 package com.example.yxjc.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;

@Configuration
public class RedisConfiguration {

    @Bean(name="redisTemplate")
    public RedisTemplate<Object, Object> redisTemplate(RedisConnectionFactory redisConnectionFactory) {
        RedisTemplate<Object, Object> redisTemplate = new RedisTemplate<>();
        redisTemplate.setConnectionFactory(redisConnectionFactory);

        // 使用Jackson2JsonRedisSerialize 替换默认序列化
        Jackson2JsonRedisSerializer jackson2JsonRedisSerializer = new Jackson2JsonRedisSerializer(Object.class);

        ObjectMapper objectMapper = new ObjectMapper();
        objectMapper.setVisibility(PropertyAccessor.ALL, JsonAutoDetect.Visibility.ANY);
        objectMapper.enableDefaultTyping(ObjectMapper.DefaultTyping.NON_FINAL);

        jackson2JsonRedisSerializer.setObjectMapper(objectMapper);

        // 设置value的序列化规则和 key的序列化规则
        redisTemplate.setValueSerializer(jackson2JsonRedisSerializer);
        redisTemplate.setKeySerializer(new StringRedisSerializer());

        redisTemplate.setHashKeySerializer(new StringRedisSerializer());
        redisTemplate.setHashValueSerializer(jackson2JsonRedisSerializer);

        redisTemplate.afterPropertiesSet();
        return redisTemplate;
    }

}

4.使用RedisTemplate

在需要使用的地方注入ReidsTemplate

@Autowired
RedisTemplate redisTemplate;

5.常用方法

  1. redisTemplate.opsForValue() 操作String
  2. redisTemplate.opsForList()  操作LIST
  3. redisTemplate.opsForSet()   操作SET
  4. redisTemplate.opsForHash()  操作HASH
  5. redisTemplate.opsForZSet()  操作ZSET