springboot 工程启动报错之Consider defining a bean of type ‘XXX’ in your configuration.
一、前言:
使用springboot自动注入的方式搭建好了工程,结果启动的时候报错了!!!,错误如下图:
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Description:
Field userEntityMapper in com.xxx.xxx.service.UserService required a bean of type ‘com.xxx.xxx.dao.UserEntityMapper’ that could not be found.
Action:
Consider defining a bean of type ‘com.xxx.xxx.dao.UserEntityMapper’ in your configuration.
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二、解决方式:
1.检查自己写的注解是否错了,并没有。
2.在网上查找解决方式:如下所示:
步骤一:
在springboot的配置文件添加,mybatis的配置如下所示:
mybatis:
typeAliasesPackage: com.xxx.xxx.dao.entity
mapperLocations: classpath:mapper/*.xml
步骤二:
①将接口与对应的实现类放在与application启动类的同一个目录或者他的子目录下,这样注解可以被扫描到,这是最省事的办法。(没测试)
②或者在启动类上加上@MapperScan或者@ComponentScan注解,手动指定application类要扫描哪些包下的注解,如下所示:
@SpringBootApplication
@ComponentScan(basePackages = {“com.xxx.xxx.dao”})
③或者在接口上添加@Mapper注解。
@Mapper
public interface UserMapper {
}
ps:之所以没有找到对应的Bean是因为,@SpringBootApplication没有扫描到。
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