Java - 将原始电子邮件内容文本 RFC 822 转换为 MimeMessage

Question

寻找将原始电子邮件消息 RFC 822 转换为 java MimeMessage 对象的选项。 MimeMessage 可以选择使用MimeMessage#writeTo将对象转换为原始电子邮件上下文，反之亦然。

背景：

Sendgrid - 入站解析调用 API 并发送 json 有效负载的原始电子邮件内容部分，我们必须从中收集电子邮件内容和附件文件。

Answer 1

    String rawEmailString = "";
    InputStream targetStream = new ByteArrayInputStream(rawEmailString.getBytes());
    Session session = null;
    MimeMessage mimeMessageObj;
    try {

        // raw message to mime conversion - start

        mimeMessageObj = new MimeMessage(session, targetStream); 

        // raw message to mime conversion - end

        // bonus line of code to play with the message
        MimeMessageParser mimeParser = new MimeMessageParser(mimeMessageObj);
        mimeParser.parse();
        List<javax.mail.Address> to = mimeParser.getTo();
        String from = mimeParser.getFrom();
        String subject = mimeParser.getSubject();
        String bodyPlain = mimeParser.getPlainContent();
        String bodyHtml = mimeParser.getHtmlContent();
        System.out.println("From id >>>>>>>>>> " + from);
    } catch (Exception ex) {
        ex.printStackTrace();
    }

对于org.apache.commons.mail.util.MimeMessageParser; 您可以使用

   <dependency>
        <groupId>org.apache.commons</groupId>
        <artifactId>commons-email</artifactId>
        <version>1.3</version>
    </dependency>