@Autowired注解 --required a single bean, but 2 were found出现的原因以及解决方法

【@Autowired注解 --required a single bean, but 2 were found出现的原因以及解决方法】的更多相关文章

@Autowired注解 --required a single bean, but 2 were found出现的原因以及解决方法

@Autowired注解是spring用来支持依赖注入的核心利器之一,但是我们或多或少都会遇到required a single bean, but 2 were found(2可能是其他数字)的问题,接下来我们从源码的角度去看为什么会出现这个问题,以及这个问题的解法是什么? 首先我们写一个demo来复现一下这个问题.首先我们有一个抽象类AbstractAutowiredDemo,两个实现类AutowiredDemo1,AutowiredDemo2.然后我们在AutowiredDemoContr…

Field amqpTemplate in * required a single bean, but 3 were found:

Field amqpTemplate in * required a single bean, but 3 were found: Spring Boot 启动的时候报的错使用Spring Boot1.5.8版本. 系统中使用了amqp组件,同事手写了两个RouteKey的RabbitTamplate的模板,项目中*类中@Autowired了RabbitTamplate. 然后就报了这个错,意思是找到了3个模板,不知道自动注入哪一个,建议: Consider marking one of th…

【记录】Field required a single bean, but 2 were found:

重构遇到个小问题,记录下: 错误信息: *************************** APPLICATION FAILED TO START *************************** Description: Field xxxService in com.alibaba.xxx required a single bean, but 2 were found: 解决方法: Action: Consider marking one of the beans as @Pri…

Field in required a single bean, but 2 were found:

我在其他类注入的时候出现以下错误 @Autowired NodeAgentService nodeAgentService; 异常 Description: Field mibService in com.xxx.xxx.controller.SnmpController required a single bean, but 2 were found: - mibServiceImpl: defined in file [F:\xxxx\monitorcenter\target\classes…

Parameter 0 of method sqlSessionTemplate in org.mybatis.spring.boot.autoconfigure.MybatisAutoConfiguration required a single bean, but 2 were found:

Parameter 0 of method orderSqlSessionFactory in com.config.MultipleDBConfig required a single bean, but 2 were found: - orderDataSource: defined by method 'orderDataSource' in class path resource [com/config/MultipleDBConfig.class] - crmDataSource: d…

Field baseMapper in com.baomidou.mybatisplus.extension.service.impl.ServiceImpl required a single bean, but xx were found:

在学习使用 mybatis-plus 时,遇到一个奇怪的异常如代码一: 代码一: Error starting ApplicationContext. To display the conditions report re-run your application with 'debug' enabled. 2019-07-17 09:16:28.739 ERROR 9800 --- [ main] o.s.b.d.LoggingFailureAnalysisReporter : *****…

springboot多数据源启动报错：required a single bean, but 6 were found:

技术群: 816227112 参考:https://stackoverflow.com/questions/43455869/could-not-autowire-there-is-more-than-one-bean-of-datasource-type Parameter 0 of method redisTemplate in org.springframework.boot.autoconfigure.data.redis.RedisAutoConfiguration required…

Spring多个数据源问题:DataSourceAutoConfiguration required a single bean, but * were found

原因: @EnableAutoConfiguration 这个注解会把配置文件号中的数据源全部都自动注入,不会默认注入一个,当使用其他数据源时再调用另外的数据源. 解决方法: 1.注释掉这个注解 2.通过如下的方式禁止springboot自动注入多个数据源 @SpringBootApplication( exclude ={ DataSourceAutoConfiguration.class, DataSourceTransactionManagerAutoConfiguration.class…

在同一个类中，一个方法调用另外一个有注解（比如@Async，@Transational）的方法，注解失效的原因和解决方法

参考原贴地址:https://blog.csdn.net/clementad/article/details/47339519 在同一个类中,一个方法调用另外一个有注解(比如@Async,@Transational)的方法,注解是不会生效的. 比如,下面代码例子中,有两方法,一个有@Transational注解,一个没有.如果调用了有注解的addPerson()方法,会启动一个Transaction:如果调用updatePersonByPhoneNo(),因为它内部调用了有注解的addPer…

【转】在同一个类中，一个方法调用另外一个有注解（比如@Async，@Transational）的方法，注解失效的原因和解决方法

参考原文链接 @Transactional does not work on method level 描述在同一个类中,一个方法调用另外一个有注解(比如@Async,@Transational)的方法,注解是不会生效的. 比如,下面代码例子中,有两方法,一个有@Transational注解,一个没有. 如果调用了有注解的addPerson()方法,会启动一个Transaction: 如果调用updatePersonByPhoneNo(),因为它内部调用了有注解的addPerson(),如果…