Redis of springboot

1. Introduction

Redis is a non-relational database, and its data structure is a key-value storage form; it can support multiple types of data storage, such as: string/list/map/object...etc. Springboot naturally integrates it, we only need to add dependencies and configuration.

2. Dependence

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

3. Configuration

Here we configure the IP/port of redis, etc., as well as the configuration of the connection pool. The opening of the connection pool needs to introduce the commons-pool2 project of apache, and check whether the dependencies exist before configuration. If not, then it needs to be added.

# Redis server address
spring.redis.host=localhost
# Redis server connection port
spring.redis.port=6379
# Redis server connection password (default is empty)
spring.redis.password=
# The maximum number of connections in the connection pool (use a negative value to indicate no limit)
spring.redis.lettuce.pool.max-active=8
# Connection pool maximum blocking wait time (use a negative value to indicate no limit)
spring.redis.lettuce.pool.max-wait=-1
# Maximum idle connections in the connection pool
spring.redis.lettuce.pool.max-idle=8
# Minimum idle connection in the connection pool
spring.redis.lettuce.pool.min-idle=0

Fourth, RedisTemplate additions, deletions and changes

    @Autowired
    private RedisTemplate redisTemplate;

    /**
     * new
     */ 
    public  void saveValue(){
        redisTemplate.opsForValue().set("name", "lay");
    }
    /**
     * Inquire
     */
    public void getValue(){
        Object value = redisTemplate.opsForValue().get("name");
        System.out.println(value);
    }

    /**
     * delete
     */ 
    public  void delValue(){
        redisTemplate.delete("name");
    }

    /**
     * renew
     */
    public void updateValue(){
        redisTemplate.opsForValue().set("name", "marry");
    }

In the above code, we inject RedisTemplate. The springboot automatic configuration mechanism will automatically inject the connectionFactory into RedisTemplate to generate Bean instances, so we can directly inject and use them.

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