java.lang.NoClassDefFoundError: javax mail Address
java.lang.Class.getDeclaredConstructors0(Native Method)
java.lang.Class.privateGetDeclaredConstructors(Class.java:2328)
java.lang.Class.getConstructor0(Class.java:2640)
java.lang.Class.newInstance0(Class.java:321)
java.lang.Class.newInstance(Class.java:303)
org.apache.struts.util.RequestUtils.applicationInstance(RequestUtils.java:143)
org.apache.struts.action.RequestProcessor.processActionCreate(RequestProcessor.java:280)
org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:218)
org.apache.struts.action.ActionServlet.process(ActionServlet.java:1194)
org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:432)
javax.servlet.http.HttpServlet.service(HttpServlet.java:709)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)

这是我的代码：

sendmailForm.getFrom(),//是谁发送的
sendmailForm.getStmphost()//邮件服务器
sendmailForm.getTo() //是发送给谁
sendmailForm.getContext(),//发送内容
sendmailForm.getTitle(),//发送标题
sendmailForm.getUser(),//用户名
sendmailForm.getPass()//密码


try {
Properties props = System.getProperties();
props.put( "mail.smtp.host",sendmailForm.getStmphost());
props.put( "mail.smtp.auth","true");

Session session = Session.getInstance(props, null);
MimeMessage mimeMessage = new MimeMessage(session);

mimeMessage.setFrom(new InternetAddress(sendmailForm.getFrom()));

mimeMessage.setRecipients(Message.RecipientType.TO,sendmailForm.getTo());
// iso-8859-1
mimeMessage.setSubject(sendmailForm.getTitle(),"gb2312 ");
mimeMessage.setText( sendmailForm.getContext(),"gb2312 ");
mimeMessage.setHeader( "Content-Type ", "text/html ");
mimeMessage.setSentDate(new Date());


Transport transport = session.getTransport( "smtp ");
transport.connect(sendmailForm.getStmphost(),sendmailForm.getUser(),sendmailForm.getPass());
transport.sendMessage(mimeMessage, mimeMessage.getRecipients(Message.RecipientType.TO));
//transport.send(mimeMessage);
transport.close();
System.out.println( "结束########################################## ");
}
catch (Exception e) {
e.printStackTrace();
return mapping.findForward("error");
}

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mail.jar包没有导入
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mail.jar activation.jar
好像是要两个包吧~
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