@Autowired来自其他班级的@Bean

Question

@Configuration
public class Class1 {
    @Bean
    public JavaMailSenderImpl mailSender() {
        ....
    }
}

@Component
public class Class2 {
    @Autowired
    JavaMailSenderImpl mailSender;

And I still get:

No qualifying bean of type [org.springframework.mail.javamail.JavaMailSenderImpl] found for dependency: expected at least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)}

Could not autowire field: org.springframework.mail.javamail.JavaMailSenderImpl (path_of_where_autowiring); nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type [org.springframework.mail.javamail.JavaMailSenderImpl] found for dependency: expected at least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)}

The Class1 bean location is in Package1 and the Class2 location is in Package2 .

Why my bean is not found? Help

(Also tried this link but didn't helped me)

EDIT

public static void main(String[] args) throws URISyntaxException, IOException {
    ConfigurableApplicationContext applicationContext = new AnnotationConfigApplicationContext(SpringConfiguration.class);
    Implclass nsi = applicationContext.getBean(Implclass.class);
    nsi.the_method_here();
}

@Component
public class Implclass implements Implinterface {
    @Autowired
    JavaMailSenderImpl mailSender;
    @Override
    public void the_method_here(){
        SimpleMailMessage message = new SimpleMailMessage();
        message.setFrom(sender);
        message.setTo(receiver);
        message.setSubject(subject);
        message.setText(content);

        mailSenderService.send(message);
    }
}

@Configuration
@ComponentScan
public class SpringConfiguration {
   @Bean
    public PropertySourcesPlaceholderConfigurer propertyConfigInDev() {
        PropertySourcesPlaceholderConfigurer propertyPlaceholderConfigurer = new PropertySourcesPlaceholderConfigurer();
        propertyPlaceholderConfigurer.setLocations(new ClassPathResource("some_property.file"));
        propertyPlaceholderConfigurer.setIgnoreUnresolvablePlaceholders(true);
        return propertyPlaceholderConfigurer;
    }
}

EDIT (TREE)

x - src/main/java
  x -- package_1
    x - Class1
  x -- package_2
    x - Class2 (ImplClass)

Answer 1

Can you please try with using different names. Reference Link : https://dzone.com/articles/playing-sround-with-spring-bean-configuration

@Configuration
public class Class1 {
@Bean
public JavaMailSenderImpl mailSenderWithInjection() {
    ....
}
}

@Component
public class Class2 {
@Autowired
JavaMailSenderImpl mailSender;
}

Answer 2

使用@ComponentScan({"Package1", "Package2"})

Answer 3

you can use @ComponentScan or

 ctx = new AnnotationConfigApplicationContext();
 ctx.register(Config.class); // config 
 ctx.refresh();
// and try 
 Implclass nsi = ctx.getBean(Implclass.class);

Answer 4

AnnotationConfigApplicationContext can take multiple configuration classes in the constructor. Can you try passing all the configuration files in the constructor as Step-1. Then it can be further debugged to better the solution.

AnnotationConfigApplicationContext(Class<?>... annotatedClasses)

eg

ConfigurableApplicationContext applicationContext = new AnnotationConfigApplicationContext(Class1.class, Class2.class, SpringConfiguration.class);

Also, where is your ImplClass, posting a tree structure would have been very helpful.