使用apache.commons.mail包发送邮件

使用apache包发邮件，首先需要包commons-email-1.0.jar，mail.jar，activation.jar

import org.apache.commons.mail.*;


public class Test {

	/**
	 * @param args
	 */
	public static void main(String[] args) throws Exception{
		Test as = new Test();
		String host = "core.gov.cn";
		String from = "[email protected]";
		String username = "[email protected]";
		String password = "1235";
		// 接收者邮箱
		String to = "[email protected]";
		String subject = "测试主题！";
		String mailConent = "测试邮件";
		// 调用发送附件邮件方法
		as.sendAttachmentMail(host, from, username, password, to, subject,
				mailConent);
	}

	public boolean sendAttachmentMail(String host, String from,
			String username, String password, String to, String subject,
			String mailConent) throws Exception {
		// 创建附件对象
		EmailAttachment attachment = new EmailAttachment();
		/* 附件的地址 */
		attachment.setPath("E://octavia_2013.pdf");
		// 设定为附件
		attachment.setDisposition(EmailAttachment.ATTACHMENT);
		/* 附件的描述 */
		attachment.setDescription("jPortMap项目设计附件文档");
		/* 附件的名称，必须和文件名一致 */
		attachment.setName("Eclipse中文教程.pdf");
		/* new一个HtmlEmail发送对象 */
		HtmlEmail email = new HtmlEmail();
		email.setAuthentication(username, password);
		email.setHostName(host);
		email.addTo(to, from);
		email.setFrom(from);
		email.setSubject(subject);
		// 注意，发送内容时，后面这段会让中文正常显示，否则乱码
		email.setCharset("UTF-8");
		email.setHtmlMsg("这是封测试附件邮件"); /* 邮件内容 */

		// 添加附件对象
		email.attach(attachment);
		// 发送
		email.send();
		System.out.println("带附件的邮件发送成功！");
		return true;
	}

}

如需要报错
Exception in thread "main" java.lang.NoClassDefFoundError: com/sun/mail/util/LineInputStream
at javax.mail.internet.MimeUtility.(MimeUtility.java:1161)
at javax.mail.internet.InternetAddress.setPersonal(InternetAddress.java:216)
at org.apache.commons.mail.Email.createInternetAddress(Email.java:422)
at org.apache.commons.mail.Email.addTo(Email.java:490)
at com.test.Test.sendAttachmentMail(Test.java:43)
at com.test.Test.main(Test.java:22)

解决方案：将Java EE 5 Library替换成J2EE 1.4 Library就行了