java - 如何向通过 SendGrid(Java 中)从 Google App Engine 发送的电子邮件添加附件？

Question

我关注了Google's information通过 SendGrid 从 App Engine 发送电子邮件。使用 Java library for SendGrid 可以正常工作。以及提供的示例代码:

import packageName.Sendgrid;

Sendgrid mail = new Sendgrid("<sendgrid_username>","<sendgrid_password>");
mail.setTo("foo@bar.com")
    .setFrom("me@bar.com")
    .setSubject("Subject goes here")
    .setText("Hello World!")
mail.send();

但现在我需要附加一个文件。如何才能做到这一点？我在 sendgrid-google-java library 中找不到 addAttachment 函数或类似的函数.

Answer 1

我只使用SendGrid Java API在 appengine 上，而不是特定的 google 上。这是一个例子:

import com.sendgrid.*;

public class SendGridExample {
  public static void main(String[] args) {
    SendGrid sendgrid = new SendGrid("SENDGRID_APIKEY");

    SendGrid.Email email = new SendGrid.Email();

    email.addTo("test@sendgrid.com");
    email.setFrom("you@youremail.com");
    email.setSubject("Sending with SendGrid is Fun");
    email.setHtml("and easy to do anywhere, even with Java");

    SendGrid.Response response = sendgrid.send(email);
  }
}

https://sendgrid.com/docs/Integrate/Code_Examples/v2_Mail/java.html

您可以使用以下 3 个函数之一将附件添加到此电子邮件对象:

    public Email addAttachment(String name, File file) throws IOException, FileNotFoundException {
        return this.addAttachment(name, new FileInputStream(file));
    }

    public Email addAttachment(String name, String file) throws IOException {
        return this.addAttachment(name, new ByteArrayInputStream(file.getBytes()));
    }

    public Email addAttachment(String name, InputStream file) throws IOException {
        this.attachments.put(name, file);
        return this;
    }