需求是这样，需要动态连接不同的redis服务器，redis的配置是从接口参数里获取的，例如参数是A服务器，那就连接a的

传统的springboot的redis链接，都是写在配置，或者在注入容器前就初始化好，这样没法做到动态变更

所以想请教下如何动态连接不同的redis服务器

目前我的代码是报错的
``

    RedisStandaloneConfiguration redisStandaloneConfiguration = new RedisStandaloneConfiguration();
    redisStandaloneConfiguration.setHostName("127.0.0.1");
    redisStandaloneConfiguration.setDatabase(4);
    redisStandaloneConfiguration.setPort(6379);

    LettuceClientConfiguration.LettuceClientConfigurationBuilder lettuceClientConfigurationBuilder = LettuceClientConfiguration.builder();

    LettuceConnectionFactory factory = new LettuceConnectionFactory(redisStandaloneConfiguration,
            lettuceClientConfigurationBuilder.build());

    RedisTemplate<String, String> redisTemplate = new RedisTemplate<>();

    redisTemplate.setConnectionFactory(factory);
    redisTemplate.afterPropertiesSet();

    System.out.println(redisTemplate.getClientList());