在spring boot中发送sendgrid电子邮件的最简单方法

<dependency>
    <groupId>com.sendgrid</groupId>
    <artifactId>sendgrid-java</artifactId>
    <version>4.7.0</version>
</dependency>

sendgrid.api-key=YOUR_SENDGRID_API_KEY

import com.sendgrid.*;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Service;

@Service
public class EmailService {

    @Value("${sendgrid.api-key}")
    private String sendGridApiKey;

    public void sendEmail(String to, String subject, String content) throws Exception {
        Email from = new Email("your-email@example.com");
        Email toEmail = new Email(to);
        Content emailContent = new Content("text/plain", content);
        Mail mail = new Mail(from, subject, toEmail, emailContent);

        SendGrid sg = new SendGrid(sendGridApiKey);
        Request request = new Request();

        request.setMethod(Method.POST);
        request.setEndpoint("mail/send");
        request.setBody(mail.build());

        Response response = sg.api(request);

        if (response.getStatusCode() != 202) {
            throw new Exception("Failed to send email. Status code: " + response.getStatusCode());
        }
    }
}

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;

@RestController
public class EmailController {

    @Autowired
    private EmailService emailService;

    @GetMapping("/send-email")
    public String sendEmail() {
        try {
            emailService.sendEmail("recipient@example.com", "Hello", "This is a test email.");
            return "Email sent successfully.";
        } catch (Exception e) {
            return "Failed to send email: " + e.getMessage();
        }
    }
}