Parameter 0 of constructor in XXX required a bean of type ‘XXX‘ that could not be found.

今天在搭建微服务项目的时候遇到了一个问题

项目结构

实际的场景是OperationLogService需要注入OperationLogMapper，也就是最常见的业务层依赖数据层，但是项目启动的时候报了这个错误，最开始我还以为是Mapper没有注册到Spring中，检查了之后我确定Service和Mapper是没有问题的，然后找了好久也没有找到原因，这时候我想到会不会是Mapper没有被扫描到？于是我检查了一下Applicaiton启动类的位置，发现真的是这个问题

我各个模块的包命名规则是priv.cwr.log.模块名,我的Application启动类是放在priv.cwr.log.web下，由于Application启动类只会扫描自己所在的包及其子包下面，所以扫包的范围是priv.cwr.log.web同级包以及子包下，所以自然也就扫不到priv.cwr.log.mapper了，把启动类放到priv.cwr.log目录下就解决了这个问题。

总结：建议下次遇到类似的问题，首先检查是不是类本身的问题，确定是否注册到了spring，比如是否有@Compoent注解之类的，如果确保了类没有问题，就去检查一下是否有被扫描到

Parameter 0 of constructor in XXX required a bean of type ‘XXX‘ that could not be found.相关推荐

Parameter 1 of constructor in xxx required a bean of type xxx‘ that could not be found.已经解决
使用Mybatis Plus 时遇到问题Parameter 1 of constructor in xxx required a bean of type xxx' that could not be ...
springCloud Feign调用报错 Parameter 6 of constructor in xxxxxxxx required a bean of type ‘xxxxxx‘ that
Description: Parameter 6 of constructor in xxxxxxx required a bean of type 'xxxxxxx' that could not ...
springboot使用junit单元测试是发生报错 Field taskUtils in com.xxx.xxx.xxxx.xxx required a bean of type 'xxx.xxx.
使用junit单元测试mybatis时发生如下错误 Error starting ApplicationContext. To display the conditions report re-run ...
springboot踩坑日记——Field xxx.xxx.xxx required a bean of type 'xxx.xxx.xxx' that could not be found
使用feign时报创建的feign接口找不到 Field xxx.xxx.xxx required a bean of type 'xxx.xxx.xxx' that could not be fou ...
使用Feign服务远程调用项目启动时报错：Field xxx in xxx required a bean of type xxx that could not be found.
报错: *************************** APPLICATION FAILED TO START ***************************Description:F ...
解决：Parameter 0 of constructor in xxx required a bean of type ‘xxx‘ that could not be found.
运行报错: Parameter 0 of constructor in com.xxx.Crawler required a bean of type 'java.lang.String' that ...
解决：Parameter 0 of constructor in XXX required a bean of type ‘XXX‘ that could not be found
解决:Parameter 0 of constructor in com.mise.smart.entity.HrmNoticeEntity required a bean of type 'java ...
spring boot报错：Parameter 4 of constructor in xx required a bean of type ‘xx‘ that could not be found.
spring boot 项目启动服务时,报错: 根据报错提示,一直认为是 SpringBootApplication 没有扫描到对应的 bean 路径. 最后,仔细排查发现是粗心的问题,自定义的常量没 ...
【踩坑专栏】Field xxFeignClient in xxx required a bean of type ‘xxx.XXFeignClient‘ that could not be found
首先我的feignClient上已标注解@FeignClient,出现这个问题的原因是因为启动类需要注解@EnableFeignClients(basePackages = "xx.xx.x ...

Parameter 0 of constructor in XXX required a bean of type ‘XXX‘ that could not be found.

Parameter 0 of constructor in XXX required a bean of type ‘XXX‘ that could not be found.相关推荐

最新文章

热门文章