spring boot redis配置，不一样的写法

纯粹是spring mvc上搬过来的，代码有点多不过很明了。
百度了好几个spring boot redis配置文章不是很理解，所有，，，

@Configuration
public class RedisConfig extends CachingConfigurerSupport {

    @Value("${spring.redis.database}")
    private int database;

    @Value("${spring.redis.host}")
    private String host;

    @Value("${spring.redis.port}")
    private int port;

    @Value("${spring.redis.password}")
    private String password;

    @Value("${spring.redis.timeout}")
    private int timeout;

    @Value("${spring.redis.pool.max-active}")
    private int maxActive;

    @Value("${spring.redis.pool.max-idle}")
    private int maxIdle;

    @Value("${spring.redis.pool.min-idle}")
    private int minIdle;

    @Value("${spring.redis.pool.max-wait}")
    private long maxWait;

    @Bean
    public JedisPoolConfig jedisPoolConfig() {
        JedisPoolConfig poolConfig = new JedisPoolConfig();
        poolConfig.setMaxTotal(maxActive);
        poolConfig.setMaxIdle(maxIdle);
        poolConfig.setMinIdle(minIdle);
        poolConfig.setMaxWaitMillis(maxWait);
        return poolConfig;
    }

    @Bean
    public JedisConnectionFactory jedisConnectionFactory() {
        JedisConnectionFactory factory = new JedisConnectionFactory(jedisPoolConfig());
        factory.setDatabase(database);
        factory.setHostName(host);
        factory.setPort(port);
        factory.setPassword(password);
        factory.setTimeout(timeout);
        return factory;
    }

    @Bean
    public RedisTemplate redisTemplate() {
        RedisTemplate template = new RedisTemplate<>();
        template.setConnectionFactory(jedisConnectionFactory());
        template.setKeySerializer(stringRedisSerializer());
        template.setValueSerializer(genericJackson2JsonRedisSerializer());
        template.setHashKeySerializer(stringRedisSerializer());
        template.setHashValueSerializer(genericJackson2JsonRedisSerializer());
        template.afterPropertiesSet();
        return template;
    }

    @Bean
    public StringRedisSerializer stringRedisSerializer() {
        return new StringRedisSerializer();
    }

    @Bean
    public GenericJackson2JsonRedisSerializer genericJackson2JsonRedisSerializer() {
        return new GenericJackson2JsonRedisSerializer();
    }

}////

template.setValueSerializer();
template.setHashValueSerializer();
这两个可以不配置，默认是java的序列化