java - Spring Autowiring 依赖，具有构造函数参数

Question

我的邮件服务具有构造函数参数并实现了一个接口(interface)

public class MailServiceImpl implements MailService {
    private MailBo mail;

    public MailBO getMail() {
        return Mail;
    }

    public void setMail(MailBO Mail) {
        this.Mail = Mail;
    }

    public MailServiceImpl(MailBo mail) {
        throw exception if from and to address is not here
        this.mail = mail;
    }

    public void sendMail(){
        use mail object to send mail here
    }
}

所以现在我正在尝试编写一个测试，我想创建 Autowiring 的 Mailserviceimpl 实例，并在其中传递构造函数参数。

我关注了this使用构造函数链接到 Autowiring 对象，但我遇到了异常

Caused by: org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type [com.model.MailBO] found for dependency: expected at least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations: {}

我的测试课

public class MailServiceImplTest {


    @Autowired
    private MailService mailServiceImpl;

    @Test
    public void testSendValidMail(){
    //test
    }
}

编辑:-

添加 spring 上下文

<beans xmlns="http://www.springframework.org/schema/beans"
    xmlns:context="http://www.springframework.org/schema/context"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://www.springframework.org/schema/beans
    http://www.springframework.org/schema/beans/spring-beans.xsd
    http://www.springframework.org/schema/context
    http://www.springframework.org/schema/context/spring-context.xsd">

    <context:component-scan base-package="com.service" />



</beans>

编辑2:-我希望我的邮箱加载一些值并将其作为构造函数对象注入(inject)到 mailserviceimpl

Answer 1

我假设 MailServiceImpl 和 MailBO 是 Spring Bean。然后只需在 MailServiceImpl 构造函数上添加 @Autowired 注释，Spring 就会自动注入(inject)构造函数依赖