Spring Boot 2.x注入RedisTemplate失败。启动报错

报错内容

使用@Autowired注入RedisTemplate的时候，项目启动报错

Field redisTemplate in com.**.***.*** required a bean of type 'org.springframework.data.redis.core.RedisTemplate' that could not be found.
The injection point has the following annotations:
	- @org.springframework.beans.factory.annotation.Autowired(required=true)

错误原因

Spring boot版本差异引起很多依赖问题和莫名其妙的问题
Spring boot 1.x 版本的Redis连接使用常见的jedis，而Spring boot 2.x使用了lettuce

解决办法

1. 排除lettuce依赖，手动写RedisConfig配置类
2. 使用lettuce(未实战)
3. 切换Spring boot版本为1.x

查到一个解决办法是直接将@Autowired改为@Resource的，但是在我的项目没有生效

手动写RedisConfig配置类

排除lettuce依赖

 
 <dependency>
     <groupId>org.springframework.bootgroupId>
     <artifactId>spring-boot-starter-data-redisartifactId>
     
     <exclusions>
         <exclusion>
             <groupId>io.lettucegroupId>
             <artifactId>lettuce-coreartifactId>
         exclusion>
     exclusions>
 dependency>
 <dependency>
     <groupId>redis.clientsgroupId>
     <artifactId>jedisartifactId>
 dependency>

手动写RedisConfig配置类

@Configuration
@EnableCaching
public class RedisConfig {
    @Bean
    //如使用注解的话需要配置cacheManager
    //此处为与1.x最大的不同
    CacheManager cacheManager(RedisConnectionFactory connectionFactory) {
        //初始化一个RedisCacheWriter
        RedisCacheWriter redisCacheWriter = RedisCacheWriter.nonLockingRedisCacheWriter(connectionFactory);
        RedisCacheConfiguration defaultCacheConfig = RedisCacheConfiguration.defaultCacheConfig();
        //设置默认超过期时间是1天
        defaultCacheConfig.entryTtl(Duration.ofDays(1));
        //初始化RedisCacheManager
        RedisCacheManager cacheManager = new RedisCacheManager(redisCacheWriter, defaultCacheConfig);
        return cacheManager;
    }

    /**
     * retemplate相关配置
     *
     * @param jedisConnectionFactory
     * @return
     */
    @Bean
    public RedisTemplate<String, Object> redisTemplate(JedisConnectionFactory jedisConnectionFactory) {
        RedisTemplate<String, Object> template = new RedisTemplate<>();
        // 配置连接工厂
        template.setConnectionFactory(jedisConnectionFactory);

        //使用Jackson2JsonRedisSerializer来序列化和反序列化redis的value值（默认使用JDK的序列化方式）
        Jackson2JsonRedisSerializer jacksonSeial = new Jackson2JsonRedisSerializer(Object.class);

        ObjectMapper objectMapper = new ObjectMapper();
        // 指定要序列化的域，field,get和set,以及修饰符范围，ANY是都有包括private和public
        objectMapper.setVisibility(PropertyAccessor.ALL, JsonAutoDetect.Visibility.ANY);
        // 指定序列化输入的类型，类必须是非final修饰的，final修饰的类，比如String,Integer等会抛出异常
        objectMapper.enableDefaultTyping(ObjectMapper.DefaultTyping.NON_FINAL);
        jacksonSeial.setObjectMapper(objectMapper);

        // 值采用json序列化
        template.setValueSerializer(jacksonSeial);
        //使用StringRedisSerializer来序列化和反序列化redis的key值
        template.setKeySerializer(new StringRedisSerializer());

        // 设置hash key 和value序列化模式
        template.setHashKeySerializer(new StringRedisSerializer());
        template.setHashValueSerializer(jacksonSeial);
        template.afterPropertiesSet();

        return template;
    }

    /**
     * 对hash类型的数据操作
     *
     * @param redisTemplate
     * @return
     */
    @Bean
    public HashOperations<String, String, Object> hashOperations(RedisTemplate<String, Object> redisTemplate) {
        return redisTemplate.opsForHash();
    }

    /**
     * 对redis字符串类型数据操作
     *
     * @param redisTemplate
     * @return
     */
    @Bean
    public ValueOperations<String, Object> valueOperations(RedisTemplate<String, Object> redisTemplate) {
        return redisTemplate.opsForValue();
    }

    /**
     * 对链表类型的数据操作
     *
     * @param redisTemplate
     * @return
     */
    @Bean
    public ListOperations<String, Object> listOperations(RedisTemplate<String, Object> redisTemplate) {
        return redisTemplate.opsForList();
    }

    /**
     * 对无序集合类型的数据操作
     *
     * @param redisTemplate
     * @return
     */
    @Bean
    public SetOperations<String, Object> setOperations(RedisTemplate<String, Object> redisTemplate) {
        return redisTemplate.opsForSet();
    }

    /**
     * 对有序集合类型的数据操作
     *
     * @param redisTemplate
     * @return
     */
    @Bean
    public ZSetOperations<String, Object> zSetOperations(RedisTemplate<String, Object> redisTemplate) {
        return redisTemplate.opsForZSet();
    }
}

使用lettuce(未实战)