Java邮件:没有提供smtp [英] Java Mail : No provider for smtp
问题描述
我正在使用JavaMail来做一个简单的应用程序,当它在目录中找到一些文件时发送电子邮件。我设法使它从Eclipse工作。我运行应用程序,它发送的电子邮件没有错误。
I am using JavaMail to do a simple application that sends an email when it finds some files in a directory. I managed to get it worked from Eclipse. I Run the application and it sent the email with no errors.
但是,当我创建了jar并执行它,它在电子邮件发送部分失败。
它提供了这个异常:
But, when I created the jar, and executed it, it fails in the email sending part. It gives this exception:
javax.mail.NoSuchProviderException: No provider for smtp
at javax.mail.Session.getProvider(Session.java:460)
at javax.mail.Session.getTransport(Session.java:655)
at javax.mail.Session.getTransport(Session.java:636)
at main.java.util.MailManager.sendMail(MailManager.java:69)
at main.java.DownloadsMail.composeAndSendMail(DownloadsMail.java:16)
at main.java.DownloadsController.checkDownloads(DownloadsController.java:51)
at main.java.MainDownloadsController.run(MainDownloadsController.java:26)
at java.lang.Thread.run(Unknown Source)
我以这种方式使用库:
public static boolean sendMail(String subject, String text) {
noExceptionsThrown = true;
try {
loadProperties();
} catch (IOException e1) {
System.out.println("Problem encountered while loading properties");
e1.printStackTrace();
noExceptionsThrown = false;
}
Properties mailProps = new Properties();
String host = "mail.smtp.host";
mailProps.setProperty(host, connectionProps.getProperty(host));
String tls = "mail.smtp.starttls.enable";
mailProps.setProperty(tls, connectionProps.getProperty(tls));
String port = "mail.smtp.port";
mailProps.setProperty(port, connectionProps.getProperty(port));
String user = "mail.smtp.user";
mailProps.setProperty(user, connectionProps.getProperty(user));
String auth = "mail.smtp.auth";
mailProps.setProperty(auth, connectionProps.getProperty(auth));
Session session = Session.getDefaultInstance(mailProps);
//session.setDebug(true);
MimeMessage message = new MimeMessage(session);
try {
message.setFrom(new InternetAddress(messageProps.getProperty("from")));
message.addRecipient(Message.RecipientType.TO, new InternetAddress(
messageProps.getProperty("to")));
message.setSubject(subject);
message.setText(text);
Transport t = session.getTransport("smtp");
try {
t.connect(connectionProps.getProperty("user"), passwordProps
.getProperty("password"));
t.sendMessage(message, message.getAllRecipients());
} catch (Exception e) {
System.out.println("Error encountered while sending the email");
e.printStackTrace();
noExceptionsThrown = false;
} finally {
t.close();
}
} catch (Exception e) {
System.out.println("Error encountered while creating the message");
e.printStackTrace();
noExceptionsThrown = false;
}
return noExceptionsThrown;
}
我正在从属性文件加载这些值。
I am loading these values from properties files.
mail.smtp.host=smtp.gmail.com
mail.smtp.starttls.enable=true
mail.smtp.port=587
mail.smtp.auth=true
我已经尝试通过ssl://smtp.gmail.com,端口更改主机465(只是为了尝试不同的东西),但它也不工作。无论如何,如果它工作正常从Eclipse与原始参数,我猜这些值是正确的,但问题是创建jar。我不太了解创建jar时可能的结果或更改。
当创建jar时,JavaMail库可能会出错?
I have tried to change the host by ssl://smtp.gmail.com, the port by 465 (just for trying something different), but it doesn't work either. Anyway, if it works fine from Eclipse with the original parameters, I guess that the values are correct, but the problem is creating the jar. I don't know very much about the possible results or changes when creating a jar. Could the JavaMail libraries someway go wrong when the jar is created?
你有什么想法吗?
推荐答案
支持jar:mail.jar和activation.jar不在你的类路径上。当你建立你的jar,你需要把它们包括在你的类路径。
The supporting jars: mail.jar and activation.jar are not on your classpath. When you build your jar, you need to include these on your classpath.
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