如何在 Spring Boot 中以编程方式制作 @Bean

Question

我不知道如何以编程方式创建 bean。这是它在 .xml 配置中的制作方式：

<bean id="mailSender"                         
 class="org.springframework.mail.javamail.JavaMailSenderImpl">
 <property name="host" value="mail.mycompany.com"/>
</bean>

<!-- this is a template message that we can pre-load with default state -->
<bean id="templateMessage"  
 class="org.springframework.mail.SimpleMailMessage">
 <property name="from" value="customerservice@mycompany.com"/>
 <property name="subject" value="Your order"/>
</bean>

<bean id="orderManager"
 class="com.mycompany.businessapp.support.SimpleOrderManager">
 <property name="mailSender" ref="mailSender"/>
 <property name="templateMessage" ref="templateMessage"/>
</bean>

我知道它必须是这样的，但我不知道如何完成它：

@Configuration
public class MailSender {

@Bean
public JavaMailSenderImpl mailSender(){

}

@Bean
public SimpleMailMessage template(){

}

@Bean
public SimpleOrderManager orderManager(){

}

}

Answer 1

它看起来像这样:

@Configuration
public class MailSender {

    @Bean
    public JavaMailSender mailSender() {
        JavaMailSenderImpl impl = new JavaMailSenderImpl();
        impl.setHost("mail.mycompany.com");
        return impl;
    }

    @Bean
    public SimpleMailMessage template() {
        SimpleMailMessage message = new SimpleMailMessage();
        message.setFrom("customerservice@mycompany.com");
        message.setSubject("Your order");
        return message;
    }
}

希望对您有所帮助;-)

Answer 2

假设已经为 mailSender 和 templateMessage 提出了建议

@Configuration public class MailSender {

@Bean public JavaMailSender mailSender() { JavaMailSenderImpl impl = new JavaMailSenderImpl(); impl.setHost("mail.mycompany.com"); return impl; }

@Bean public SimpleMailMessage templateMessage() { SimpleMailMessage message = new SimpleMailMessage(); message.setFrom("customerservice@mycompany.com"); message.setSubject("Your order"); return message; }

怎么样：

    @Bean
    public SimpleOrderManager orderManager(){
        return new SimpleOrderManager(mailSender(), templateMessage());
    }

或者如果您在 SimpleOrderManager 上使用 setter：

@Bean
public SimpleOrderManager orderManager(){
    SimpleOrderManager orderManager = new SimpleOrderManager();

    orderManager.setMailSender(mailSender());
    orderManager.setTemplateMessage(templateMessage());

    return orderManager;
}

如何在 Spring Boot 中以编程方式制作 @Bean

How to make @Bean programatically in Spring Boot

java

spring

javabeans