Error creating bean with name ‘redisConnectionFactory‘ defined in class path resource

女爷i 2022-09-02 14:45 238阅读 0赞

1.问题描述  
在redis整合springcache的时候一直报错。  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQxMzU4NTc0_size_16_color_FFFFFF_t_70]  
按照信息找的发生问题的部分：

@Configuration
    @EnableCaching
    public class RedisConfig { 
    	@Primary
    	@Bean
    	//@ConditionalOnBean(RedisConnectionFactory.class)
    
    	public CacheManager cacheManager(RedisConnectionFactory redisConnectionFactory){ 
    		RedisCacheConfiguration redisCacheConfiguration = RedisCacheConfiguration.defaultCacheConfig();
    		redisCacheConfiguration = redisCacheConfiguration
    				//设置缓存的默认超时时间：30分钟
    				.entryTtl(Duration.ofMinutes(30L))
    				//如果是空值，不缓存
    				.disableCachingNullValues()
    
    				//设置key序列化器
    				.serializeKeysWith(RedisSerializationContext.SerializationPair.fromSerializer(keySerializer()))
    				//设置value序列化器
    				.serializeValuesWith(RedisSerializationContext.SerializationPair.fromSerializer(valueSerializer()));
    
    		return RedisCacheManager
    				.builder(RedisCacheWriter.nonLockingRedisCacheWriter(redisConnectionFactory))
    				.cacheDefaults(redisCacheConfiguration)
    				.build();
    	}
    
    	/** * key序列化器 */
    	private RedisSerializer<String> keySerializer() { 
    		return new StringRedisSerializer();
    	}
    	/** * value序列化器 */
    	private RedisSerializer<Object> valueSerializer() { 
    		return new GenericJackson2JsonRedisSerializer();
    	}
    
    }

如果加上一句  
@ConditionalOnBean(RedisConnectionFactory.class)  
报错信息变为：  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQxMzU4NTc0_size_16_color_FFFFFF_t_70 1]  
Error creating bean with name ‘redisConnectionFactory’ defined in class path resource \[org/springframework/boot/autoconfigure/data/redis/LettuceConnectionConfiguration.class\]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate \[org.springframework.data.redis.connection.lettuce.LettuceConnectionFactory\]: Factory method ‘redisConnectionFactory’ threw exception; nested exception is java.lang.NoClassDefFoundError: org/apache/commons/pool2/impl/GenericObjectPoolConfig

发现在pom.xml中连接池依赖包没有导：

<dependency>
                <groupId>org.apache.commons</groupId>
                <artifactId>commons-pool2</artifactId>
                <version>2.6.2</version>
            </dependency>

再次启动：  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQxMzU4NTc0_size_16_color_FFFFFF_t_70 2]  
成功了。。。what a fuck…折腾了一小时  
2.自己的配置代码：

@Configuration
    @EnableCaching
    public class RedisConfig { 
    	@Primary
    	@Bean
    @ConditionalOnBean(RedisConnectionFactory.class)
    
    	public CacheManager cacheManager(RedisConnectionFactory redisConnectionFactory){ 
    		RedisCacheConfiguration redisCacheConfiguration = RedisCacheConfiguration.defaultCacheConfig();
    		redisCacheConfiguration = redisCacheConfiguration
    				//设置缓存的默认超时时间：30分钟
    				.entryTtl(Duration.ofMinutes(30L))
    				//如果是空值，不缓存
    				.disableCachingNullValues()
    
    				//设置key序列化器
    				.serializeKeysWith(RedisSerializationContext.SerializationPair.fromSerializer(keySerializer()))
    				//设置value序列化器
    				.serializeValuesWith(RedisSerializationContext.SerializationPair.fromSerializer(valueSerializer()));
    
    		return RedisCacheManager
    				.builder(RedisCacheWriter.nonLockingRedisCacheWriter(redisConnectionFactory))
    				.cacheDefaults(redisCacheConfiguration)
    				.build();
    	}
    
    	/** * key序列化器 */
    	private RedisSerializer<String> keySerializer() { 
    		return new StringRedisSerializer();
    	}
    	/** * value序列化器 */
    	private RedisSerializer<Object> valueSerializer() { 
    		return new GenericJackson2JsonRedisSerializer();
    	}
    
    }

@Configuration
    @EnableSwagger2
    public class SwaggerConfig { 
    
        @Value(value = "true")
        private Boolean swaggerEnabled;
    
        @Bean
        public Docket createRestApi() { 
            return new Docket(DocumentationType.SWAGGER_2)
                    .apiInfo(apiInfo())
                    .enable(swaggerEnabled)
                    .select()
                    .apis(RequestHandlerSelectors.basePackage("com.example.rediscache.springcache"))
                    .paths(PathSelectors.any())
                    .build();
        }
    
        private ApiInfo apiInfo() { 
            return new ApiInfoBuilder()
                    .title("接口文档")
                    .description("Spring Boot整合redis自动生成缓存")
                    .termsOfServiceUrl("https：XXXX")//自己设置
                    .version("1.0")
                    .build();
        }
    }

@SpringBootApplication
    @MapperScan(basePackages = { "com.example.rediscache.springcache.mapper"})//指定要扫描的Mapper类的包的路径
    public class SpringcacheApplication { 
    
        public static void main(String[] args) { 
            SpringApplication.run(SpringcacheApplication.class, args);
        }
    
    }

server.port=9090
    spring.redis.host=localhost
    # Redis\u670D\u52A1\u5668\u8FDE\u63A5\u7AEF\u53E3
    spring.redis.port=6379  
    # Redis\u670D\u52A1\u5668\u8FDE\u63A5\u5BC6\u7801\uFF08\u9ED8\u8BA4\u4E3A\u7A7A\uFF09
    # spring.redis.password=123
    # \u8FDE\u63A5\u6C60\u6700\u5927\u8FDE\u63A5\u6570\uFF08\u4F7F\u7528\u8D1F\u503C\u8868\u793A\u6CA1\u6709\u9650\u5236\uFF09 \u9ED8\u8BA4 8
    spring.redis.lettuce.pool.max-active=8
    # \u8FDE\u63A5\u6C60\u6700\u5927\u963B\u585E\u7B49\u5F85\u65F6\u95F4\uFF08\u4F7F\u7528\u8D1F\u503C\u8868\u793A\u6CA1\u6709\u9650\u5236\uFF09 \u9ED8\u8BA4 -1
    spring.redis.lettuce.pool.max-wait=-1
    # \u8FDE\u63A5\u6C60\u4E2D\u7684\u6700\u5927\u7A7A\u95F2\u8FDE\u63A5 \u9ED8\u8BA4 8
    spring.redis.lettuce.pool.max-idle=8
    # \u8FDE\u63A5\u6C60\u4E2D\u7684\u6700\u5C0F\u7A7A\u95F2\u8FDE\u63A5 \u9ED8\u8BA4 0
    spring.redis.lettuce.pool.min-idle=0
    mybatis.mapper-locations=classpath*:com/example/rediscache/springcache/mapper/xml/*.xml

输入地址：http://localhost:9090/swagger-ui.html  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQxMzU4NTc0_size_16_color_FFFFFF_t_70 3]  
自己的代码目录：  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQxMzU4NTc0_size_16_color_FFFFFF_t_70 4]

总结 注意几个要点  
mapperscan的路径要对（在配置文件中要写mybatis-mapper的扫描路径，springbootapplicaiton类上面要写@MapperScan(basePackages = \{“com.example.rediscache.springcache.mapper”\})//指定要扫描的Mapper类的包的路径  
使用redis一定要注意redis的配置和mysql的配置（端口号和ip要对，有密码要配密码，redis的conf中可以修改bind 0.0.0.0, 就是用来允许任意计算机都可以连接redis服务连接。  
如果bind设置为:bind 127.0.0.1,只有本台主机可以连接到redis,

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[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQxMzU4NTc0_size_16_color_FFFFFF_t_70 2]: /images/20220829/b2f968e4f4ae4f1dafda42ec867513f5.png
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Error creating bean with name ‘redisConnectionFactory‘ defined in class path resource

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