Java 从tomcat6发送多部分邮件时出现IllegalStateException

我正在使用从grails应用程序发送带有附件的多部分邮件

在我的本地机器（MacOSX）上，一切正常。如果我将我的应用程序部署到tomcat6（Ubuntu-），邮件将无法发送，因为出现了

IllegalStateException

：

Stacktrace follows: 
   java.lang.IllegalStateException: Not in multipart mode - 
   create an appropriate MimeMessageHelper via a constructor that takes a 'multipart' 
   flag if you need to set alternative texts or add inline elements or attachments. 
      at grails.plugin.mail.MailMessageBuilder.doAdd(MailMessageBuilder.groovy:347) 
      at grails.plugin.mail.MailMessageBuilder.attach(MailMessageBuilder.groovy:308) 
      at grails.plugin.mail.MailMessageBuilder.attach(MailMessageBuilder.groovy:284) 
      at grails.plugin.mail.MailMessageBuilder.attachBytes(MailMessageBuilder.groovy:280)
      ...

简单邮件（不是多部分邮件）可以从tomat6成功发送

以下是我发送多部分邮件的代码：

mailService.sendMail {
   multipart true
   to mail
   subject mySubject
   body (view: myView, model: myModel)
   attachBytes "${myTitle}.pdf", CH.config.grails.mime.types['pdf'], myBytes
} 

如何避免这些异常

底层JavaMail库位于哪里？它被打包成战争档案了吗

---

我怎样才能知道我的tomcat6和本地机器上使用了哪个版本的JavaMail？

我找到了问题的根源——这是我自己犯的一个愚蠢的错误

mailService

的调用被封装到另一个服务中，以以下方式添加默认的

bcc

：

def sendWithBcc(Closure callable) {
    // build a wrapper closure around the standard mail closure, which adds BCC functionality
    def newMailClosure = {
        if(CH.config.extraMail.bcc) {
            bcc(CH.config.extraMail.bcc)
        }

        // set the delegate of the inner closure to the delegate of this closure and call the inner closure
        callable.delegate = delegate
        callable.resolveStrategy = Closure.DELEGATE_FIRST
        callable.call()
    }

    return mailService.sendMail(newMailClosure)
}

在我的本地机器上，一切正常，因为我没有指定

extraMail.bcc

就在设置

bcc

时，

MailMessageBuilder

中似乎忽略了外部闭包的multipart属性

解决方案是改变

bcc

的位置，如下所示：

def sendWithBcc(Closure callable) {
    // build a wrapper closure around the standard mail closure, which adds BCC functionality
    def newMailClosure = {            
        // set the delegate of the inner closure to the delegate of this closure and call the inner closure
        callable.delegate = delegate
        callable.resolveStrategy = Closure.DELEGATE_FIRST
        callable.call()

        if(CH.config.extraMail.bcc) {
            bcc(CH.config.extraMail.bcc)
        }
    }

    return mailService.sendMail(newMailClosure)
}

真丢脸-下次我会发布更精确的代码