Bean method 'redisTemplate' in 'RedisAutoConfiguration.RedisConfiguration' not loaded

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本文解决了一个在Spring Boot项目中整合Redis时遇到的问题，即因存在两个同名的RedisTemplate bean导致的加载失败。通过自定义并重命名RedisTemplate为redisTemplateCustomize，成功避免了冲突。

项目开发过程中，需要整合redis，在整合过程中，出现了如下的错误：

Parameter 0 of method cacheManager in org.springframework.boot.autoconfigure.cache.RedisCacheConfiguration required a bean of type 'org.springframework.data.redis.core.RedisTemplate' that could not be found.
	- Bean method 'redisTemplate' in 'RedisAutoConfiguration.RedisConfiguration' not loaded because @ConditionalOnMissingBean (names: redisTemplate; SearchStrategy: all) found bean 'redisTemplate'
	- Bean method 'stringRedisTemplate' in 'RedisAutoConfiguration.RedisConfiguration' not loaded because @ConditionalOnMissingBean (types: org.springframework.data.redis.core.StringRedisTemplate; SearchStrategy: all) found bean 'stringRedisTemplate'


Action:

Consider revisiting the conditions above or defining a bean of type 'org.springframework.data.redis.core.RedisTemplate' in your configuration.

错误原因：

有两个同名的bean都叫redisTemplate，导致加载失败。

解决方法：

自定义的redisTemplate改名，如下：

@Bean(name = "redisTemplateCustomize")
//    @ConditionalOnMissingBean(name = "redisTemplate")
    public RedisTemplate<String, Object> redisTemplateCustomize(
        @Qualifier("redisConnectionFactory") RedisConnectionFactory redisConnectionFactory)
        throws UnknownHostException
    {
        Jackson2JsonRedisSerializer<Object> jackson2JsonRedisSerializer = new Jackson2JsonRedisSerializer<Object>(
            Object.class);
        ObjectMapper om = new ObjectMapper();
        om.setVisibility(PropertyAccessor.ALL, JsonAutoDetect.Visibility.ANY);
        om.enableDefaultTyping(ObjectMapper.DefaultTyping.NON_FINAL);
        jackson2JsonRedisSerializer.setObjectMapper(om);

        RedisTemplate<String, Object> template = new RedisTemplate<String, Object>();
        template.setConnectionFactory(redisConnectionFactory);
        template.setKeySerializer(jackson2JsonRedisSerializer);
        template.setValueSerializer(jackson2JsonRedisSerializer);
        template.setHashKeySerializer(jackson2JsonRedisSerializer);
        template.setHashValueSerializer(jackson2JsonRedisSerializer);
        template.afterPropertiesSet();
        return template;
    }

使用时，如下：

@Autowired
    @Qualifier("redisTemplateCustomize")
    private RedisTemplate redisTemplate;