springboot中如何手动连接redis？

    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 redisTemplate = new RedisTemplate<>();



    redisTemplate.setConnectionFactory(factory);

    redisTemplate.afterPropertiesSet();



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