小编Lan*_*Zai的帖子

我在设置Outlook邮件到OutlookMail时遇到了麻烦,我按照这里和这里的说明进行操作

Properties props = new Properties();
          props.put("mail.smtp.user", d_email);
          props.put("mail.smtp.host", "smtp-mail.outlook.com");
          props.put("mail.smtp.port", "587");
          props.put("mail.smtp.starttls.enable","true");
          props.put("mail.smtp.auth", "true");
          props.put("mail.smtp.socketFactory.port", "587");
          props.put("mail.smtp.socketFactory.class", "javax.net.ssl.SSLSocketFactory");
          props.put("mail.smtp.socketFactory.fallback", "true");

          try
          {
          Authenticator auth = new javax.mail.Authenticator() {
              protected PasswordAuthentication getPasswordAuthentication() {
                  return new PasswordAuthentication(d_email, d_password);
              }
            };

          Session session = Session.getInstance(props, auth);

          MimeMessage msg = new MimeMessage(session);
          msg.setText("Hey, this is the testing email.");
          msg.setSubject("Testing");
          msg.setFrom(new InternetAddress(d_email));
          msg.addRecipient(Message.RecipientType.TO, new InternetAddress("example@gmail.com"));
          Transport.send(msg);

          }catch (MessagingException mex) {
             mex.printStackTrace();
          }

我一直在收到错误:

javax.mail.MessagingException: Could not connect to SMTP host: …

我正在使用PrimeFaces 5.3 <p:fileUpload>上传PNG图像,我想<p:graphicImage>在保存到数据库之前显示它的预览.

这是一个MCVE:

<h:form enctype="multipart/form-data">
    <p:fileUpload value="#{bean.uploadedFile}" mode="simple" />
    <p:graphicImage value="#{bean.image}" />
    <p:commandButton action="#{bean.preview}" ajax="false" value="Preview" />
</h:form>

private UploadedFile uploadedFile;

public UploadedFile getUploadedFile() {
    return uploadedFile;
}

public void setUploadedFile(UploadedFile uploadedFile) {
    this.uploadedFile = uploadedFile;
}

public void preview() {
    // NOOP for now.
}

public StreamedContent getImage() {
    if (uploadedFile == null) {
        return new DefaultStreamedContent(); 
    } else {
        return new DefaultStreamedContent(new ByteArrayInputStream(uploadedFile.getContents()), "image/png"); 
    }
}

在辅助bean上没有发生错误,图像将不会加载并显示在前端.客户端提到图像返回404未找到错误.