相关疑难解决方法(0)

中午我试图让我的应用程序通过javamail发送html +图像,我只设法发送html,但与图像我有一些问题.我决定创建一个多部分消息,一切顺利,但后来我使用类加载器从WEB-INF/resources/images检索.png文件我得到一个NullPointerExcetion,我不知道为什么会这样？

这是我的EJB(3.0)的样子.我很欣赏这一个我没有太多经验的ClassLoader类(不太了解它).

@Stateless(name = "ejbs/EmailServiceEJB")
public class EmailServiceEJB implements IEmailServiceEJB {

@Resource(name = "mail/myMailSession")
private Session mailSession;

public void sendAccountActivationLinkToBuyer(String destinationEmail,
        String name) {

    // Destination of the email
    String to = destinationEmail;
    String from = "dontreply2thismessage@gmail.com";

    try {
        Message message = new MimeMessage(mailSession);
        // From: is our service
        message.setFrom(new InternetAddress(from));
        // To: destination given
        message.setRecipients(Message.RecipientType.TO,
                InternetAddress.parse(to));
        message.setSubject("Uspijesna registracija");
        // How to found at http://www.rgagnon.com/javadetails/java-0321.html
        message.setContent(generateActivationLinkTemplate(), "text/html");

        Date timeStamp = new Date();
        message.setSentDate(timeStamp);

        // Prepare a multipart HTML
        Multipart …