无法在 Glassfish 上部署的应用程序中发送电子邮件
我实际上花了两天时间处理这个问题，到处用谷歌搜索，但仍然无法解决它，让我们看看是否有人发现我做错了什么：
我在 Glassfish 中定义了一个 javaMail 会话，其中包含与邮件服务器（主机、用户、通行证、端口等）。我部署了一个应用程序，该应用程序使用 jndi 查找该会话并尝试发送电子邮件。代码是：
InitialContext ctx = new InitialContext();
Session session = (Session) ctx.lookup("mail/javaMailSession");
Message msg = new MimeMessage(session);
msg.setSubject("test");
msg.setRecipient(RecipientType.TO, new InternetAddress("[email protected]", "zzz"));
msg.setFrom(new InternetAddress("[email protected]", "hhh"));
BodyPart messageBodyPart = new MimeBodyPart();
messageBodyPart.setText("this is a test email");
Transport.send(msg);
现在，如果我在没有 mail.jar 依赖项的情况下部署应用程序，则在加载包含此代码的类时，我会收到
ClassNotFoundException: javax.mail.Message，这意味着 mail.jar 不在类路径中。
如果我将 mail.jar 放入 domain/lib 文件夹中，或者只是将类路径条目添加到我的应用程序清单中（包括 mail.jar 的位置），我将不再遇到 ClassNotFoundException，但是当执行查找并检索会话，我得到最奇怪的
ClassCastException: javax.mail.Session cannot be cast to javax.mail.Session.
这意味着我有两个版本的 mail.jar，但正如我所说，如果我从 /lib 中删除它或不将类路径条目添加到清单中，它甚至找不到一个。
我使用的是Ubuntu 11.10，使用Glassfish 3.1.1和java-6-sun-1.6.0.26（所以activation.jar不是问题）。任何想法都会非常感激，因为我想不出其他的了。
I've spent literally two days with this, googled it everywhere and still couldnt solve it, let's see if someone finds what I'm doing wrong:
I've defined a javaMail Session in Glassfish, with all the parameters needed to communicate with a mail server (host, user, pass, port, etc..). I deploy an application that looks up that Session using jndi and tries to send an email. The code is:
InitialContext ctx = new InitialContext();
Session session = (Session) ctx.lookup("mail/javaMailSession");
Message msg = new MimeMessage(session);
msg.setSubject("test");
msg.setRecipient(RecipientType.TO, new InternetAddress("[email protected]", "zzz"));
msg.setFrom(new InternetAddress("[email protected]", "hhh"));
BodyPart messageBodyPart = new MimeBodyPart();
messageBodyPart.setText("this is a test email");
Transport.send(msg);
Now if I deploy my app without the mail.jar dependency, when the class that contains this code is loaded I get a
ClassNotFoundException: javax.mail.Message, meaning mail.jar is not in the classpath.
If I place mail.jar into domain/lib folder or just add a classpath entry into my app's manifest including the location of mail.jar, I no longer have the ClassNotFoundException, but when the lookup is executed and I retrieve the Session, I get the weirdest
ClassCastException: javax.mail.Session cannot be cast to javax.mail.Session.
This would mean that I have two versions of mail.jar, but as I said if I remove it from /lib or dont add the classpath entry to the manifest it doesnt even find one.
I'm on Ubuntu 11.10, using Glassfish 3.1.1 and java-6-sun-1.6.0.26 (so activation.jar is not the problem). Any idea will be much appreciated, as I can't think of anything else.
如果你对这篇内容有疑问，欢迎到本站社区发帖提问 参与讨论，获取更多帮助，或者扫码二维码加入 Web 技术交流群。
绑定邮箱获取回复消息
由于您还没有绑定你的真实邮箱，如果其他用户或者作者回复了您的评论，将不能在第一时间通知您！
发布评论
评论（1）
JavaMail（所有 javax.mail.* 类）包含在 GlassFish 中（假设您使用的是完整的 Java EE 平台版本而不仅仅是 Web Profile 版本）；您不需要在应用程序中包含 mail.jar 或手动安装它。我无法解释为什么当你这样做时找不到 javax.mail.Message 。 ClassCastException 表明您有两个版本的 mail.jar 可供应用程序使用。
JavaMail (all the javax.mail.* classes) is included in GlassFish (assuming you're using the full Java EE platform version and not just the Web Profile version); you shouldn't need to include mail.jar in your application or install it manually. I can't explain why javax.mail.Message isn't found when you do that. The ClassCastException indicates that you have two versions of mail.jar available to the application.