Question

如何在Java中使用Runtime运行Unix程序？到目前为止，这就是我的全部。我的计划是收发邮件的变化，以便我可以在不同接收者的循环中运行它。

Runtime run = Runtime.getRuntime();
Process mailx = run.exec("cat Docs/Mailmsgtmp.txt | mailx -s 'Subject' -r 'sender@mail.com' " + "reciever@mail.com");

Answer 1

请勿使用Runtime.exec()，请使用ProcessBuilder。哦，Java也有用于发送邮件的库，所以你不需要使用外部命令......

无论如何，使用ProcessBuilder，您可以轻松地重定向标准输入，这意味着您可以执行此操作：

// recipient is the email address of the... recipient
final ProcessBuilder pb = new ProcessBuilder("mailx", "-r", 
    "sender@foo.com", recipient);

final Path textToSend = Paths.get("Docs/mailtext.txt").toRealPath();
pb.redirectInput(textToSend.toFile());

// Also redirect stdout and stderr somewhere

final Process p = pb.start();

return p.waitFor();

将此代码放入一个方法中，为什么不是Callable，并检查返回代码。如果您想一次发送多封邮件，请使用ExecutorService。

有关如何使用纯Java发送电子邮件的许多链接，请参阅here。

Answer 2

您应该考虑使用Java的内置邮件包JavaMail。

来自http://www.tutorialspoint.com/java/java_sending_email.htm的简单示例：

  // Recipient's email ID needs to be mentioned.
  String to = "abcd@gmail.com";

  // Sender's email ID needs to be mentioned
  String from = "web@gmail.com";

  // Assuming you are sending email from localhost
  String host = "localhost";

  // Get system properties
  Properties properties = System.getProperties();

  // Setup mail server
  properties.setProperty("mail.smtp.host", host);

  // Get the default Session object.
  Session session = Session.getDefaultInstance(properties);

  try{
     // Create a default MimeMessage object.
     MimeMessage message = new MimeMessage(session);

     // Set From: header field of the header.
     message.setFrom(new InternetAddress(from));

     // Set To: header field of the header.
     message.addRecipient(Message.RecipientType.TO,
                              new InternetAddress(to));

     // Set Subject: header field
     message.setSubject("This is the Subject Line!");

     // Now set the actual message
     message.setText("This is actual message");

     // Send message
     Transport.send(message);
     System.out.println("Sent message successfully....");
  }catch (MessagingException mex) {
     mex.printStackTrace();
  }

有关详尽的文档，请参阅https://java.net/projects/javamail/pages/Home。

在Unix中用Java发送多封邮件

2 个答案: