Java 我无法将附件发送到NetBeans之外

我有一个问题，那就是当我在NetBeans中通过Gmail发送附件时，程序会正常工作并发送消息，但当我try 从NetBeans运行JAR文件时，程序不会显示打印数字3的对话框. 这意味着问题从这一行开始 MultiPartEmail Email=new MultiPartEmail()； 程序将继续执行，而不会引发异常或打印数字3.

知道该程序使用了几个库，所有这些库都按照它们在JAR文件中应有的方式工作.

我还try 了一个库javax-mail.jar.我遇到了同样的问题，因为程序在NetBeans中工作得很好，但JAR文件不能只发送消息.

以下是我的完整类代码:

package FTPEmail;

import org.apache.commons.mail.DefaultAuthenticator;
import org.apache.commons.mail.EmailAttachment;
import org.apache.commons.mail.EmailException;
import org.apache.commons.mail.MultiPartEmail;

import java.io.IOException;

public class SendAttachment {

public SendAttachment(String attachment, String subject, String msg) throws IOException {
    final String sender = "sender123@gmail.com";
    final String receiver = "receiver123@gmail.com";
    final String password = "abc123abc123abc1";
    Tools.Text.dialogErrorNumber("1");
    try {
        EmailAttachment emailAttachment = new EmailAttachment();
        emailAttachment.setPath(attachment);
        emailAttachment.setDisposition(EmailAttachment.ATTACHMENT);
        emailAttachment.setDescription("Attachment");
        Tools.Text.dialogErrorNumber("2");
        MultiPartEmail email = new MultiPartEmail();
        Tools.Text.dialogErrorNumber("3");
        email.setHostName("smtp.gmail.com");
        Tools.Text.dialogErrorNumber("4");
        email.setSmtpPort(465);
        Tools.Text.dialogErrorNumber("5");
        email.setAuthenticator(new DefaultAuthenticator(sender, password));
        Tools.Text.dialogErrorNumber("6");
        email.setSSLOnConnect(true);
        Tools.Text.dialogErrorNumber("7");
        email.addTo(receiver);
        Tools.Text.dialogErrorNumber("8");
        email.setFrom(sender);
        Tools.Text.dialogErrorNumber("9");
        email.setSubject(subject);
        Tools.Text.dialogErrorNumber("10");
        email.setMsg(msg);
        Tools.Text.dialogErrorNumber("11");

        // attach the file
        email.attach(emailAttachment);
        Tools.Text.dialogErrorNumber("12");
        // send the email
        email.send();
    } catch (EmailException e) {
        Tools.Text.dialogErrorNumber(e.getMessage());
        Tools.Text.dialogErrorNumber("0060");
    }
}
}