1. 解释“no matching autowired candidates found”错误的含义 这个错误通常出现在使用@Autowired注解进行依赖注入时,如果Spring容器中没有任何bean能够匹配注入点的需求,就会抛出这个错误。简单来说,就是Spring找不到可以注入的bean。 2. 分析可能导致该错误的原因 缺少相应的bean定义:在Spring配置中没有定义需要注入的...
在按照文档配置执行器项目时,发现怎么启动,xxlJobExecutor都没有被加载进来。 解决: 后来经过查阅,原来是springBoot启动默认扫描的是启动类所在的包以及其子包,而我的文件为:因此bean注入失败。把它放到对应文件夹下就可以了。 参考: https://pythonjishu.com/fudltesrvemwroz/ https://blog.csdn.net/qq_42914528...
假设系统里面有同个接口有多个实现,有可能就会出现 NoUniqueBeanDefinitionException。如下例: publicinterfaceHuman{StringgetGender();}publicclassManimplementsHuman{@OverridepublicStringgetGender(){return"男";}}publicclassWomanimplementsHuman{@OverridepublicStringgetGender(){return"女";}}publicclassMultiBeanExample...
RedisAutoConfiguration required a bean of type 'org.springframework.data.redis.connection.RedisConnectionFactory' that could not be found. The injection point has the following annotations: - @org.springframework.beans.factory.annotation.Autowired(required=true) The following candidates were found but ...
RedisAutoConfiguration required a bean of type 'org.springframework.data.redis.connection.RedisConnectionFactory' that could not be found. The injection point has the following annotations: - @org.springframework.beans.factory.annotation.Autowired(required=true) The following candidates were found but ...
- @org.springframework.beans.factory.annotation.Autowired(required=true) The following candidates were found but could not be injected: - Bean method 'redisConnectionFactory' in 'JedisConnectionConfiguration' not loaded because @ConditionalOnClass did not find required classes 'org.apache.commons.pool2...
@Autowired 注解是按需要注入的类型来筛选,如果有多个同类型的 Bean 先按照 BeanDefintion 的 isAutowireCandidate() 过滤(默认是 true),如果有 @Qualifier 注解则根据指定的 Bean 名称过滤。否则后面再根据 @Primary 注解过滤,否则再根据 @Priority 注解过滤,否则最后再根据名称过滤。
[spring-beans-5.2.7.RELEASE.jar:5.2.7.RELEASE] at org.springframework.beans.factory.support.ConstructorResolver.resolveAutowiredArgument(ConstructorResolver.java:884) ~[spring-beans-5.2.7.RELEASE.jar:5.2.7.RELEASE] at org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(...
@Autowired SampleService sampleService; 启动应用后,Spring就会优雅地提示如下错误: Exception in thread "main" org.springframework.beans.factory.NoUniqueBeanDefinitionException: No qualifying bean of type 'com.john.primary.SampleService' available: expected single matching bean but found 2: ServiceA,Servic...
nested exception is org.springframework.beans.factory.NoUniqueBeanDefinitionException: No qualifying bean of type [com.james.dao.impl.BaseDao] is defined: expected single matching bean but found 2: 这是因为都标明了@Service会自动注入,这时会导致不清楚实际运行时实例化哪一类。