使用sendgrid- JAVA的PDF附件

import com.sendgrid.*;
import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;

public class SendGridExample {
    public static void main(String[] args) {
        String apiKey = "YOUR_SENDGRID_API_KEY";
        Email from = new Email("sender@example.com");
        String subject = "Sending email with PDF attachment";
        Email to = new Email("recipient@example.com");
        Content content = new Content("text/plain", "This is the email content");

        Mail mail = new Mail(from, subject, to, content);

        try {
            Path pdfPath = Paths.get("path/to/pdf/file.pdf");
            byte[] pdfBytes = Files.readAllBytes(pdfPath);
            String pdfData = new String(pdfBytes);

            Attachments attachments = new Attachments();
            attachments.setContent(pdfData);
            attachments.setType("application/pdf");
            attachments.setFilename("attachment.pdf");
            attachments.setDisposition("attachment");

            mail.addAttachments(attachments);
        } catch (IOException e) {
            e.printStackTrace();
        }

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

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

            Response response = sg.api(request);
            System.out.println(response.getStatusCode());
            System.out.println(response.getBody());
            System.out.println(response.getHeaders());
        } catch (IOException ex) {
            ex.printStackTrace();
        }
    }
}