使用spring-boot在依赖项注入中创建bean时出错

Question

这是我的代码- https://github.com/iyngaran/to-do-list

我在info.iyngaran.core.auth.repository包中有UserRepository类，并且用@Repository注释了它。

当我试图将它注入到info.iyngaran.core.auth.security包中的CustomUserDetailsService类中时，我得到了以下错误。

org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'customUserDetailsService': Unsatisfied dependency expressed through field 'userRepository'; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type 'info.iyngaran.core.auth.repository.UserRepository' available: expected at least 1 bean which qualifies as autowire candidate. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)}

有人能帮我找出这个问题吗？提前谢谢。

Answer 1

我通过将以下代码行添加到spring boot主类修复了这个问题。

@EnableJpaRepositories({"info.iyngaran.core","info.iyngaran.todolistapi"})

这解决了我的问题。以下是详细信息- https://stackoverflow.com/a/53172477/9348637

Answer 2

主要问题是组件扫描。因此，请按照以下方式排列代码

在包根info.iyngaran处移动TodolistApiApplication类

并清理杂乱

package info.iyngaran;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;

import javax.annotation.PostConstruct;
import java.util.TimeZone;

@SpringBootApplication
public class TodolistApiApplication {

    @PostConstruct
    void init() {
        TimeZone.setDefault(TimeZone.getTimeZone("UTC"));
    }


    public static void main(String[] args) {
        SpringApplication.run(TodolistApiApplication.class, args);
    }

}

还要使用构造函数注入(对于修复来说不是强制的)。现场注入是非常糟糕的做法

private final UserRepository userRepository;

public CustomUserDetailsService(UserRepository userRepository) {
    this.userRepository = userRepository;
}