SpringBoot发送Gmail邮件

在Spring Boot中发送Gmail邮件需要以下步骤：

1. 在Gmail设置中启用“对所有服务的访问权限”。
2. 创建OAuth2.0客户端ID，用于生成客户端密钥和客户端秘密。
3. 在Spring Boot项目中添加依赖和配置。
4. 使用JavaMailSender发送邮件。

以下是一个简单的例子：

pom.xml依赖

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

application.properties配置

spring.mail.host=smtp.gmail.com
spring.mail.port=587
spring.mail.username=your-gmail-username@gmail.com
spring.mail.password=your-client-secret
spring.mail.properties.mail.smtp.auth=true
spring.mail.properties.mail.smtp.starttls.enable=true
spring.mail.properties.mail.smtp.starttls.required=true

JavaMailSender配置

@Configuration
public class MailConfig {
 
    @Bean
    public JavaMailSender javaMailSender(MailProperties mailProperties) {
        JavaMailSenderImpl mailSender = new JavaMailSenderImpl();
        mailSender.setHost(mailProperties.getHost());
        mailSender.setPort(mailProperties.getPort());
        mailSender.setUsername(mailProperties.getUsername());
        mailSender.setPassword(mailProperties.getPassword());
 
        Properties properties = mailProperties.getProperties();
        if (properties != null) {
            mailSender.setJavaMailProperties(properties);
        }
 
        return mailSender;
    }
}

发送邮件的服务

@Service
public class EmailService {
 
    private final JavaMailSender mailSender;
 
    @Autowired
    public EmailService(JavaMailSender mailSender) {
        this.mailSender = mailSender;
    }
 
    public void sendEmail(String to, String subject, String text) {
        SimpleMailMessage message = new SimpleMailMessage();
        message.setTo(to);
        message.setSubject(subject);
        message.setText(text);
 
        mailSender.send(message);
    }
}

使用服务发送邮件

@RestController
public class EmailController {
 
    private final EmailService emailService;
 
    @Autowired
    public EmailController(EmailService emailService) {
        this.emailService = emailService;
    }
 
    @PostMapping("/sendEmail")
    public String sendEmail(@RequestParam String to, @RequestParam String subject, @RequestParam String text) {
        emailService.sendEmail(to, subject, text);
        return "Email sent successfully";
    }
}

确保替换your-gmail-username@gmail.com和your-client-secret为你的Gmail用户名和客户端秘密。

发送邮件时，请确保你的应用已经授权并且客户端密钥和