使用commons-email-1.2发邮件的一点总结

今天用到commons-email-1.2.jar来发邮件
先导入commons-email-1.2.jar包,类如下:
import org.apache.commons.mail.SimpleEmail;

public class SendEmail {

	public static void main(String args[]) {

		System.out.println("Begin Send email");
		// TODO Auto-generated method stub
		try {
			SimpleEmail email = new SimpleEmail();
			email.setHostName("mail.xxx.com.cn");
			email.addTo("[email protected]", "xxx");
			email.setFrom("[email protected]", "testMe");
			email.setSubject("hello");
			email.setMsg("hello");
			email.send();
		} catch (Exception e) {
			e.printStackTrace();
		}
	}
}


但是却一直抛异常:
org.apache.commons.mail.EmailException: Sending the email to the following server failed : mail.xxx.com.cn:25
	at org.apache.commons.mail.Email.sendMimeMessage(Email.java:1242)
	at org.apache.commons.mail.Email.send(Email.java:1267)
	at SendEmail.main(SendEmail.java:18)
Caused by: javax.mail.NoSuchProviderException: smtp
	at javax.mail.Session.getService(Session.java:768)
	at javax.mail.Session.getTransport(Session.java:708)
	at javax.mail.Session.getTransport(Session.java:651)
	at javax.mail.Session.getTransport(Session.java:631)
	at javax.mail.Session.getTransport(Session.java:686)
	at javax.mail.Transport.send0(Transport.java:166)
	at javax.mail.Transport.send(Transport.java:98)
	at org.apache.commons.mail.Email.sendMimeMessage(Email.java:1232)
	... 2 more

首先是jar包的问题,因为不是只下载commons-mail的jar包,如果是jdk1.5或者1.5以下的版本,还需要下载sun的mail.jar和jaf的jar包,如果是jdk6的话只需要mail.jar就可以了。具体下载地址去sun网站自己找找就行了,
然后就是要开启邮箱的smtp服务,具体的进入邮箱进行设置就可以了。一般都很简单。

我用的是jdk1.6,所以只用导入mail.jar就行,导入mail.jar后问题又来了,
Exception in thread "main" java.lang.NoClassDefFoundError: com/sun/mail/util/LineInputStream
	at javax.mail.internet.MimeUtility.<clinit>(MimeUtility.java:1161)
	at javax.mail.internet.InternetAddress.setPersonal(InternetAddress.java:216)
	at org.apache.commons.mail.Email.createInternetAddress(Email.java:589)
	at org.apache.commons.mail.Email.addTo(Email.java:727)
	at org.apache.commons.mail.Email.addTo(Email.java:710)
	at SendEmail.main(SendEmail.java:14)


不要看到NoClassFound就以为是缺少包,如果是包的冲突,也会有这种错误的。
Exception in thread "main" java.lang.NoClassDefFoundError: com/sun/mail/util/LineInputStream
当出现以上错误时,恭喜您已经离接收邮件不远了,否则请您解决好所有的异常后再来看这个帖子。

javax.mail和javax.activation这两个包已经在javaEE5当中属于基础包了,就是JDK中自带了已经,但是里面的方法与现在外面的mail.jar和activation.jar有一些出入,所以初学者在直接copy别人代码的时候往往会出现上面的错误。
废话不多说下面是解决方法
进到

C:\myeclipse6.0\eclipse\plugins\com.genuitec.eclipse.j2eedt.core_6.0.1.zmyeclipse601200710\data\libraryset\EE_5

这个路径里,可以看到javaee.jar,用rar把这个文件打开,然后进到javax文件夹里,删除mail和activation两个文件夹(删掉就OK,不过要注意备份一下)

删掉之后运行上面的代码,经行简单的修改以后就可以实现接收邮件的功能了!

以下是163, yahoo和gmail的例子,以供参考
163和yahoo的类似,只需要改smtp服务器就行
SimpleEmail email = new SimpleEmail();
  try {
   email.setHostName("smtp.163.com"); //Yahoo的服务器地址是:smtp.mail.yahoo.com
   email.addTo("发送到的地址", "John Doe"); 
   email.setFrom("发送的邮件地址", "Mr Smith");
   email.setAuthentication("用户名", "密码");
   email.setSubject("Test message");
   email.setMsg("This is a simple test of commons-email");
   email.send();
  } catch (EmailException e) {
   // TODO Auto-generated catch block
   e.printStackTrace();
  }

gmail跟其他的邮箱的不同之处在于它的默认端口不是普通的25,而是465,所以需要在程序中动态设置一下,设置的具体方法就是:
   email.setSSL(Boolean.TRUE); // 设定是否使用SSL
   email.setSslSmtpPort("465"); // 设定SSL端口

SimpleEmail email = new SimpleEmail();
  try {
   email.setHostName("smtp.gmail.com");
   email.setSSL(Boolean.TRUE); // 设定是否使用SSL
   email.setSslSmtpPort("465"); // 设定SSL端口
   email.addTo("发送到的地址", "John Doe"); 
   email.setFrom("发送的邮件地址", "Mr Smith");
   email.setAuthentication("用户名", "密码");
   email.setSubject("Test message");
   email.setMsg("This is a simple test of commons-email");
   email.send();
  } catch (EmailException e) {
   // TODO Auto-generated catch block
   e.printStackTrace();
  }


如果gmail出了这种错误基本上就是没设置端口的原因:
org.apache.commons.mail.EmailException: Sending the email to the following server failed : smtp.gmail.com:25
 at org.apache.commons.mail.Email.sendMimeMessage(Email.java:1242)
 at org.apache.commons.mail.Email.send(Email.java:1267)
 at SendEmail.main(SendEmail.java:24)
Caused by: com.sun.mail.smtp.SMTPSendFailedException: 530 5.7.0 Must issue a STARTTLS command first. 21sm7388726ywh.46
 at com.sun.mail.smtp.SMTPTransport.issueSendCommand(SMTPTransport.java:1829)
 at com.sun.mail.smtp.SMTPTransport.mailFrom(SMTPTransport.java:1368)
 at com.sun.mail.smtp.SMTPTransport.sendMessage(SMTPTransport.java:886)
 at javax.mail.Transport.send0(Transport.java:191)
 at javax.mail.Transport.send(Transport.java:120)
 at org.apache.commons.mail.Email.sendMimeMessage(Email.java:1232)
 ... 2 more


希望对大家能有所帮助

你可能感兴趣的:(commons)