Question

我试图运行简单的mailsender服务：

@Service
public class MailService {

    @Autowired
    private MailSender mailSender;

    @Autowired
    private SimpleMailMessage templateMessage;

    @Autowired
    private AuthenticationService authenticationService;

    public void sendMessage(SaveSurveyDTO saveSurvey) {

        title += "title2";
        templateMessage.setSubject(title);
        // templateMessage.setTo(email.toString());
        templateMessage.setTo("my@mail.com");
        mailSender.send(templateMessage);
    }

}


@Configuration
public class MailConfig {

    @Bean
    public JavaMailSenderImpl mailSender() {
        JavaMailSenderImpl sender = new JavaMailSenderImpl();
        Properties props = new Properties();
        props.put("mail.smtp.auth", true);
        props.put("mail.debug", "true");
        props.put("mail.smtp.host", "adres");
        props.put("mail.smtp.port", "25");
        props.put("mail.smtp.auth.mechanisms", "NTLM");
        props.put("mail.smtp.auth.ntlm.domain", "DOMAIN");
        sender.setHost("host");
        sender.setPort(25);
        sender.setJavaMailProperties(props);
        sender.setUsername("username");
        sender.setPassword("pass");
        return sender;

    }
}

当我试图运行时，我收到以下错误：

Exception in thread "main" org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'testappController': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: private org.test.service.MailService org.test.testappController.mailService; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'mailService': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: private org.springframework.mail.SimpleMailMessage org.test.service.MailService.templateMessage; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type [org.springframework.mail.SimpleMailMessage] 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)}
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:334)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1210)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:537)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:476)
    at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:303)
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230)
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:299)
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:194)
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:755)
    at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:757)
    at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:480)
    at org.springframework.boot.context.embedded.EmbeddedWebApplicationContext.refresh(EmbeddedWebApplicationContext.java:118)
    at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:686)
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:320)
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:957)
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:946)
    at org.test.testapp.main(testapp.java:12)
Caused by: org.springframework.beans.factory.BeanCreationException: Could not autowire field: private org.test.service.MailService org.test.testappController.mailService; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'mailService': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: private org.springframework.mail.SimpleMailMessage org.test.service.MailService.templateMessage; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type [org.springframework.mail.SimpleMailMessage] 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)}
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:561)
    at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:88)
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:331)
    ... 16 more
Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'mailService': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: private org.springframework.mail.SimpleMailMessage org.test.service.MailService.templateMessage; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type [org.springframework.mail.SimpleMailMessage] 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)}
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:334)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1210)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:537)
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:476)
    at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:303)
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230)
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:299)
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:194)
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.findAutowireCandidates(DefaultListableBeanFactory.java:1120)
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1044)
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:942)
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:533)
    ... 18 more
Caused by: org.springframework.beans.factory.BeanCreationException: Could not autowire field: private org.springframework.mail.SimpleMailMessage org.test.service.MailService.templateMessage; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type [org.springframework.mail.SimpleMailMessage] 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)}
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:561)
    at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:88)
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:331)
    ... 29 more
Caused by: org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type [org.springframework.mail.SimpleMailMessage] found for dependency: expected at least 1 bean which qualifies as autowire candidate for this dependency. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)}
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.raiseNoSuchBeanDefinitionException(DefaultListableBeanFactory.java:1301)
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1047)
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:942)
    at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:533)
    ... 31 more

Answer 1

错误告诉你出了什么问题：

Caused by: org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type [org.springframework.mail.SimpleMailMessage] 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)}

主要问题是您在服务中使用了SimpleMailMessage类型的字段，并使用@Autowired进行了注释。但是你的@Configuration课程中没有这样的bean。

将bean定义添加到您的配置中（我不建议这样做），或者只是在方法中创建SimpleMailMessage。

public void sendMessage(SaveSurveyDTO saveSurvey) {
    SimpleMailMessage message = new SimpleMailMessage();    
    title += "title2";
    message.setSubject(title);
    // templateMessage.setTo(email.toString());
    message.setTo("my@mail.com");
    mailSender.send(message);
}

专业提示

您正在使用Spring Boot然后使用它...删除您的@Configuration类，并将配置放在application.properties中。 Spring Boot已经has mail support（从Spring Boot 1.2开始！）。

spring.mail.host=adres
spring.mail.port=25
spring.mail.username=username
spring.mail.password=password
spring.mail.properties.mail.smtp.auth=true
spring.mail.properties.mail.smtp.auth.mechanisms=NTLM
spring.mail.properties.mail.smtp.auth.ntlm.domain=DOMAIN
spring.mail.properties.mail.debug=true

Answer 2

您遇到的问题是Spring无法注入SimpleMailMessage的实例：

@Autowired
private SimpleMailMessage templateMessage;

这是完全正常的，您不应该以这种方式构造SimpleMailMessage，它不是Spring Bean。而是使用默认构造函数：

SimpleMailMessage templateMessage = new SimpleMailMessage();

并根据您的需要设置属性from，to等。

Answer 3

请添加像这样的限定符

@Autowired
@Qualifier("mailSender")
private MailSender mailSender;

MailSender春天

3 个答案: