使用电子邮件服务的grails错误

这是控制器

类javamailercontroller{

JavaMailerService javamailerservice
def x = {javamailerservice.serviceMethod()} }

这是服务

导入javax.mail。 进口 javax.mail.internet。 进口 Java.UTI.*;

类javamailerservice{

boolean transactional = false

def serviceMethod() { String  d_email = "thisemail@gmail.com",
        d_password = "thispassword",
        d_host = "smtp.gmail.com",
        d_port  = "587",
        m_to = "thisto@gmail.com",
        m_subject = "Testing",
        m_text = "Hey, this is the testing email.";

    Properties props = new Properties();
    props.put("mail.smtp.user", d_email);
    props.put("mail.smtp.host", d_host);
    props.put("mail.smtp.port", d_port);
    props.put("mail.smtp.starttls.enable","true");

//以防万一,但目前没有 很有必要,奇怪的是 props.put(“mail.smtp.auth”,“true”); //props.put(“mail.smtp.debug”,“true”); props.put(“mail.smtp.socketfactory.port”, DyPART); props.put(“mail.smtp.socketfactory.class”, “javax.net.ssl.sslsocketfactory”); props.put(“mail.smtp.socketfactory.fallback”, “假”;

    SecurityManager security = System.getSecurityManager();

    try
    {
        Authenticator auth = new SMTPAuthenticator();
        Session session = Session.getInstance(props, auth);
        //session.setDebug(true);

        MimeMessage msg = new MimeMessage(session);
        msg.setText(m_text);
        msg.setSubject(m_subject);
        msg.setFrom(new InternetAddress(d_email));
        msg.addRecipient(Message.RecipientType.TO,

新的国际地址(m_to); 发送(msg); } catch(异常mex) { mex.printstacktrace(); } }

}

私有类smtpauthenticator 扩展javax.mail.authenticator { 公共密码身份验证GetPasswordAuthentication() { 返回新密码身份验证(D_电子邮件, DY密码; } }

误差

错误200:java.lang.NullPointerException:无法对空对象调用方法serviceMethod() servlet:grails uri:/javamailer/grails/javamailer/x.dispatch 异常消息:无法对空对象调用方法ServiceMethod() 原因:java.lang.nullPointerException:无法对空对象调用方法serviceMethod() 类别:未知 行:[-1] 代码段: