小编Jam*_*ett的帖子

是否可以javax.mail使用"现有" InputStream发送电子邮件附件内容的电子邮件？

目前我正在构建如下电子邮件:

final MimeMessage message = new MimeMessage(session);
message.setFrom(new InternetAddress(from));
message.addRecipient(Message.RecipientType.TO, new InternetAddress(to));
message.setSubject("Subject line");

final Multipart multipartContent = new MimeMultipart();

    final MimeBodyPart textPart = new MimeBodyPart();
    textPart.setText("Message body");
    multipartContent.addBodyPart(textPart);

    final MimeBodyPart attachmentPart = new MimeBodyPart();
    final DataSource source = new InputStreamDataSource("text/plain", "test.txt", new ByteArrayInputStream("CONTENT INPUT STREAM".getBytes()));
    attachmentPart.setDataHandler(new DataHandler(source));
    attachmentPart.setFileName("text.txt");
    multipartContent.addBodyPart(attachmentPart);

message.setContent(multipartContent);

InputStreamDataSource 实施如下:

public class InputStreamDataSource implements DataSource
{
    private final String contentType;
    private final String name;
    private final InputStream inputStream;

    public InputStreamDataSource(String contentType, String …