How to implement email sending functionality in Spring Boot?

In SpringBoot, you can implement email functionality using Spring’s email sending module, spring-boot-starter-mail, and configure the relevant email sending information in the application.properties file.

Firstly, import the spring-boot-starter-mail dependency in the pom.xml file.

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-mail</artifactId>
</dependency>

Then configure the relevant information for sending emails in the application.properties file, such as:

spring.mail.host=smtp.example.com
spring.mail.port=587
spring.mail.username=your-email@example.com
spring.mail.password=your-email-password
spring.mail.properties.mail.smtp.auth=true
spring.mail.properties.mail.smtp.starttls.enable=true

Next, write the service class for sending emails in Java code. The example code is as follows:

@Service
public class EmailService {

    @Autowired
    private JavaMailSender javaMailSender;

    public void sendEmail(String to, String subject, String text) {
        SimpleMailMessage message = new SimpleMailMessage();
        message.setTo(to);
        message.setSubject(subject);
        message.setText(text);

        javaMailSender.send(message);
    }
}

Finally, simply call the sendEmail method from EmailService wherever you need to send an email. For example:

@Autowired
private EmailService emailService;

emailService.sendEmail("recipient@example.com", "Test Email", "This is a test email from SpringBoot.");

This way, you can implement email sending functionality in Spring Boot.