JAVA入门大坑:expected at least 1 bean which qualifies as autowire candidate. Dependency annotations

本文探讨了SpringBoot项目中出现的依赖注入失败问题,具体表现为在启动过程中遇到的TestDao注入错误。文章分析了异常原因,并给出了相应的解决办法,包括正确配置@SpringBootApplication注解和确保相关Bean已定义。

摘要生成于 C知道 ,由 DeepSeek-R1 满血版支持, 前往体验 >

Exception encountered during context initialization - cancelling refresh attempt: org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'helloWord': Unsatisfied dependency expressed through field 'testMapper': Error creating bean with name 'testMapperImpl': Unsatisfied dependency expressed through field 'testDao': No qualifying bean of type 'com.example.myspringboot.Dao.TestDao' available: expected at least 1 bean which qualifies as autowire candidate. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)}

Description:

Field testDao in com.example.myspringboot.Service.TestMapperImpl required a bean of type 'com.example.myspringboot.Dao.TestDao' that could not be found.

The injection point has the following annotations:
    - @org.springframework.beans.factory.annotation.Autowired(required=true)


Action:

Consider defining a bean of type 'com.example.myspringboot.Dao.TestDao' in your configuration.

不要用这个注释:

@SpringBootApplication(exclude = {DataSourceAutoConfiguration.class})

只用:

@SpringBootApplication

//@SpringBootApplication(exclude = {DataSourceAutoConfiguration.class})
//@MapperScan()
@SpringBootApplication
//@EnableScheduling
public class MySpringBootApplication {
    public static void main(String[] args) {
        SpringApplication.run(MySpringBootApplication.class, args);
    }
}

dao层无法注入service

评论
添加红包

请填写红包祝福语或标题

红包个数最小为10个

红包金额最低5元

当前余额3.43前往充值 >
需支付:10.00
成就一亿技术人!
领取后你会自动成为博主和红包主的粉丝 规则
hope_wisdom
发出的红包

打赏作者

一种时光

你的鼓励将是我创作的最大动力

¥1 ¥2 ¥4 ¥6 ¥10 ¥20
扫码支付:¥1
获取中
扫码支付

您的余额不足,请更换扫码支付或充值

打赏作者

实付
使用余额支付
点击重新获取
扫码支付
钱包余额 0

抵扣说明:

1.余额是钱包充值的虚拟货币,按照1:1的比例进行支付金额的抵扣。
2.余额无法直接购买下载,可以购买VIP、付费专栏及课程。

余额充值