需要幫助設置一個類來發送電子郵件，它從主類調用

Question

當用戶第一次登錄時，我正嘗試從我的應用程序發送電子郵件。 該電子郵件包含激活碼。

更新：我下載了最新的javamail API以及最新的JAF（JavaBeans Activation Framework），由於導入是未知符號，因此無法編譯。 如何從javax包導入？

這是我到目前為止的代碼：

import java.util.ArrayList;
import javax.mail.Message;
import javax.mail.MessagingException;
import javax.mail.Session;
import javax.mail.Transport;
import javax.mail.internet.AddressException;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeMessage;

public class Email {
    static String smtpHost;
    static int smtpPort;
    static String from;
    static String to;
    static String subject;
    static String content;

    public Email(String toEmail, String code){
        smtpHost = "localhost";
        smtpPort = 25;
        from = "admin@Nestroia.com";
        to = toEmail;
        subject = "Hello from Nestroia.com";
        content = "This is your activation code: " + code;
    }

    public Email(String toEmail, String name, String password){
        smtpHost = "localhost";
        smtpPort = 25;
        from = "admin@Nestroia.com";
        to = toEmail;
        subject = "Hello from Nestroia.com";
        content = "This is your Login information.\n"
                + "Name: " + name + "\n"
                + "Password: " + password;        
    }

    public static void send() throws AddressException, MessagingException {

        // Create a mail session
        java.util.Properties props = new java.util.Properties();
        props.put("mail.smtp.host", smtpHost);
        props.put("mail.smtp.port", ""+smtpPort);
        Session session = Session.getDefaultInstance(props, null);

        // Construct the message
        Message msg = new MimeMessage(session);
        msg.setFrom(new InternetAddress(from));
        msg.setRecipient(Message.RecipientType.TO, new InternetAddress(to));
        msg.setSubject(subject);
        msg.setText(content);

        // Send the message
        Transport.send(msg);

這是堆棧跟蹤：

java.lang.RuntimeException: java.lang.ClassFormatError: Absent Code attribute in     method that is not native or abstract in class file javax/mail/Address
at com.sun.javafx.tk.quantum.GlassViewEventHandler.handleMouseEvent(Unknown Source)
at com.sun.glass.ui.View.handleMouseEvent(Unknown Source)
at com.sun.glass.ui.View.notifyMouse(Unknown Source)
at com.sun.glass.ui.win.WinApplication._runLoop(Native Method)
at com.sun.glass.ui.win.WinApplication.access$100(Unknown Source)
at com.sun.glass.ui.win.WinApplication$2$1.run(Unknown Source)
at java.lang.Thread.run(Thread.java:722)
Caused by: java.lang.ClassFormatError: Absent Code attribute in method that is not native or abstract in class file javax/mail/Address
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:791)
at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
at java.net.URLClassLoader.defineClass(URLClassLoader.java:449)
at java.net.URLClassLoader.access$100(URLClassLoader.java:71)
at java.net.URLClassLoader$1.run(URLClassLoader.java:361)
at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
at java.lang.ClassLoader.loadClass(ClassLoader.java:423)
at java.lang.ClassLoader.loadClass(ClassLoader.java:356)
at Nestroia.Nestroia_Main$6$1.handle(Nestroia_Main.java:669)
at Nestroia.Nestroia_Main$6$1.handle(Nestroia_Main.java:559)
at com.sun.javafx.event.CompositeEventHandler.dispatchBubblingEvent(Unknown Source)
at com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(Unknown Source)
at com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(Unknown Source)
at com.sun.javafx.event.CompositeEventDispatcher.dispatchBubblingEvent(Unknown Source)
at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(Unknown Source)
at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(Unknown Source)
at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(Unknown Source)
at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(Unknown Source)
at com.sun.javafx.event.EventUtil.fireEventImpl(Unknown Source)
at com.sun.javafx.event.EventUtil.fireEvent(Unknown Source)
at javafx.event.Event.fireEvent(Unknown Source)
at javafx.scene.Node.fireEvent(Unknown Source)
at javafx.scene.control.Button.fire(Unknown Source)
at com.sun.javafx.scene.control.behavior.ButtonBehavior.mouseReleased(Unknown Source)
at com.sun.javafx.scene.control.skin.SkinBase$5.handle(Unknown Source)
at com.sun.javafx.scene.control.skin.SkinBase$5.handle(Unknown Source)
at com.sun.javafx.event.CompositeEventHandler.dispatchBubblingEvent(Unknown Source)
at com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(Unknown Source)
at com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(Unknown Source)
at com.sun.javafx.event.CompositeEventDispatcher.dispatchBubblingEvent(Unknown Source)
at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(Unknown Source)
at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(Unknown Source)
at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(Unknown Source)
at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(Unknown Source)
at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(Unknown Source)
at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(Unknown Source)
at com.sun.javafx.event.EventUtil.fireEventImpl(Unknown Source)
at com.sun.javafx.event.EventUtil.fireEvent(Unknown Source)
at javafx.event.Event.fireEvent(Unknown Source)
at javafx.scene.Scene$MouseHandler.process(Unknown Source)
at javafx.scene.Scene$MouseHandler.process(Unknown Source)
at javafx.scene.Scene$MouseHandler.access$1300(Unknown Source)
at javafx.scene.Scene.impl_processMouseEvent(Unknown Source)
at javafx.scene.Scene$ScenePeerListener.mouseEvent(Unknown Source)
... 7 more

Answer 1

我猜你的類路徑中可能只有javaee.jar，它有javax.mail。*類的定義，但不是實際的實現。

你應該下載javamail api，如果你還沒有。 在這里找到

Answer 2

您正在使用不包含實現的javaee.jar。 它是一個“存根”實現，只是為了實現編譯，而不是執行。 這篇文章提供了更多細節。 （它指的是Java EE 5，但對於6.）也是如此。）

Answer 3

本文提供了解釋和可能的解決方案。 您可能需要調整類路徑。