我想将Excel文件作为附件发送给邮件
当我使用物理文件时，一切都很好，但是当我将其用作临时文件时，出现此异常
javax.mail.MessagingException: IOException while sending message;
java.io.FileNotFoundException: 2019-03-02.xls (Le fichier spécifié est introuvable)
在创建临时文件时，使用以下代码：
//....
try {//create temp file here
file = File.createTempFile(today,".xlsx");
} catch (IOException ex) {
Logger.getLogger(Writer.class.getName()).log(Level.SEVERE, null, ex);
}
try (FileOutputStream fileOut = new FileOutputStream(file)) {
workbook.write(fileOut);
//.....
但是当我使用这样的普通文件时，它工作得很好：
try (FileOutputStream fileOut = new FileOutputStream(today+".xlsx")) {
workbook.write(fileOut);
任何解决方案吗？
或任何建议如何在不保存的情况下发送excel文件？
编辑：这是完整的例外
javax.mail.MessagingException: IOException while sending message;
nested exception is:
java.io.FileNotFoundException: 2019-03-02.xls (Le fichier spécifié est introuvable)
at com.sun.mail.smtp.SMTPTransport.sendMessage(SMTPTransport.java:625)
at rapport.rapportc.sendMail(rapportc.java:113)
at rapport.rapportc.envoyer(rapportc.java:60)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at sun.reflect.misc.Trampoline.invoke(MethodUtil.java:71)
at sun.reflect.GeneratedMethodAccessor1.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at sun.reflect.misc.MethodUtil.invoke(MethodUtil.java:275)
at javafx.fxml.FXMLLoader$MethodHandler.invoke(FXMLLoader.java:1769)
at javafx.fxml.FXMLLoader$ControllerMethodEventHandler.handle(FXMLLoader.java:1657)
at com.sun.javafx.event.CompositeEventHandler.dispatchBubblingEvent(CompositeEventHandler.java:86)
at com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(EventHandlerManager.java:238)
at com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(EventHandlerManager.java:191)
at com.sun.javafx.event.CompositeEventDispatcher.dispatchBubblingEvent(CompositeEventDispatcher.java:59)
at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:58)
at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:56)
at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:56)
at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
at com.sun.javafx.event.EventUtil.fireEventImpl(EventUtil.java:74)
at com.sun.javafx.event.EventUtil.fireEvent(EventUtil.java:49)
at javafx.event.Event.fireEvent(Event.java:198)
at javafx.scene.Node.fireEvent(Node.java:8413)
at javafx.scene.control.Button.fire(Button.java:185)
at com.sun.javafx.scene.control.behavior.ButtonBehavior.mouseReleased(ButtonBehavior.java:182)
at com.sun.javafx.scene.control.skin.BehaviorSkinBase$1.handle(BehaviorSkinBase.java:96)
at com.sun.javafx.scene.control.skin.BehaviorSkinBase$1.handle(BehaviorSkinBase.java:89)
at com.sun.javafx.event.CompositeEventHandler$NormalEventHandlerRecord.handleBubblingEvent(CompositeEventHandler.java:218)
at com.sun.javafx.event.CompositeEventHandler.dispatchBubblingEvent(CompositeEventHandler.java:80)
at com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(EventHandlerManager.java:238)
at com.sun.javafx.event.EventHandlerManager.dispatchBubblingEvent(EventHandlerManager.java:191)
at com.sun.javafx.event.CompositeEventDispatcher.dispatchBubblingEvent(CompositeEventDispatcher.java:59)
at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:58)
at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:56)
at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
at com.sun.javafx.event.BasicEventDispatcher.dispatchEvent(BasicEventDispatcher.java:56)
at com.sun.javafx.event.EventDispatchChainImpl.dispatchEvent(EventDispatchChainImpl.java:114)
at com.sun.javafx.event.EventUtil.fireEventImpl(EventUtil.java:74)
at com.sun.javafx.event.EventUtil.fireEvent(EventUtil.java:54)
at javafx.event.Event.fireEvent(Event.java:198)
at javafx.scene.Scene$MouseHandler.process(Scene.java:3757)
at javafx.scene.Scene$MouseHandler.access$1500(Scene.java:3485)
at javafx.scene.Scene.impl_processMouseEvent(Scene.java:1762)
at javafx.scene.Scene$ScenePeerListener.mouseEvent(Scene.java:2494)
at com.sun.javafx.tk.quantum.GlassViewEventHandler$MouseEventNotification.run(GlassViewEventHandler.java:381)
at com.sun.javafx.tk.quantum.GlassViewEventHandler$MouseEventNotification.run(GlassViewEventHandler.java:295)
at java.security.AccessController.doPrivileged(Native Method)
at com.sun.javafx.tk.quantum.GlassViewEventHandler.lambda$handleMouseEvent$354(GlassViewEventHandler.java:417)
at com.sun.javafx.tk.quantum.QuantumToolkit.runWithoutRenderLock(QuantumToolkit.java:389)
at com.sun.javafx.tk.quantum.GlassViewEventHandler.handleMouseEvent(GlassViewEventHandler.java:416)
at com.sun.glass.ui.View.handleMouseEvent(View.java:555)
at com.sun.glass.ui.View.notifyMouse(View.java:937)
at com.sun.glass.ui.win.WinApplication._runLoop(Native Method)
at com.sun.glass.ui.win.WinApplication.lambda$null$148(WinApplication.java:191)
at java.lang.Thread.run(Thread.java:745)
Caused by: java.io.FileNotFoundException: 2019-03-02.xls (Le fichier spécifié est introuvable)
at java.io.FileInputStream.open0(Native Method)
at java.io.FileInputStream.open(FileInputStream.java:195)
at java.io.FileInputStream.<init>(FileInputStream.java:138)
at javax.activation.FileDataSource.getInputStream(FileDataSource.java:97)
at javax.activation.DataHandler.writeTo(DataHandler.java:305)
at javax.mail.internet.MimeBodyPart.writeTo(MimeBodyPart.java:1350)
at javax.mail.internet.MimeBodyPart.writeTo(MimeBodyPart.java:845)
at javax.mail.internet.MimeMultipart.writeTo(MimeMultipart.java:361)
at com.sun.mail.handlers.multipart_mixed.writeTo(multipart_mixed.java:85)
at javax.activation.ObjectDataContentHandler.writeTo(DataHandler.java:889)
at javax.activation.DataHandler.writeTo(DataHandler.java:317)
at javax.mail.internet.MimeBodyPart.writeTo(MimeBodyPart.java:1350)
at javax.mail.internet.MimeMessage.writeTo(MimeMessage.java:1683)
at com.sun.mail.smtp.SMTPTransport.sendMessage(SMTPTransport.java:585)
... 60 more
EDIT2：这是我用来发送带有附件的电子邮件的功能
private void sendMail(){
try{
String host ="smtp.gmail.com" ;
String user = "send@gmail.com";
String pass = "pwd";
String to = "recieve@gmail.com";
String from = "send@gmail.com";
String subject = "sending day : "+today; // today is a string variable for today's date
String messageText = "msg";
boolean sessionDebug = false;
Properties props = System.getProperties();
props.put("mail.smtp.starttls.enable", "true");
props.put("mail.smtp.host", host);
props.put("mail.smtp.port", "587");
props.put("mail.smtp.auth", "true");
props.put("mail.smtp.starttls.required", "true");
java.security.Security.addProvider(new com.sun.net.ssl.internal.ssl.Provider());
Session mailSession = Session.getDefaultInstance(props, null);
mailSession.setDebug(sessionDebug);
Message msg = new MimeMessage(mailSession);
msg.setFrom(new InternetAddress(from));
InternetAddress[] address = {new InternetAddress(to)};
msg.setRecipients(Message.RecipientType.TO, address);
msg.setSubject(subject); msg.setSentDate(new Date());
msg.setText(messageText);
Multipart emailContent = new MimeMultipart();
MimeBodyPart textBodyPart = new MimeBodyPart();
textBodyPart.setText("");
MimeBodyPart excelAttach = new MimeBodyPart();
String path = today+".xls"; // here where i put the excel file to be send
excelAttach.attachFile(path);
emailContent.addBodyPart(textBodyPart);
emailContent.addBodyPart(excelAttach);
msg.setContent(emailContent);
Transport transport=mailSession.getTransport("smtp");
transport.connect(host, user, pass);
transport.sendMessage(msg, msg.getAllRecipients());
transport.close();
System.out.println("message send successfully");
}catch(IOException | MessagingException ex)
{
alert.alert.showErrorMessage(ex);
return;
}
}
Ps：：当我发送物理文件时，一切正常
我想发送excel文件而不用临时文件或其他方式保存它！
答案 0 :(得分：0)
如果您对此进行更改，则可以获得更多翔实的异常消息：
excelAttach.attachFile(path);
对此：
excelAttach.attachFile(new File(path).getAbsolutePath());
问题是您对File.createTempFile的行为做出了两个错误的假设。
所有操作系统都使用一组随机字符创建一个临时文件，以确保该文件是唯一的。当您执行file = File.createTempFile(today, ".xlsx")时，您不是在创建一个名为2019-03-02.xls的文件，而是创建一个名称为/tmp/2019-03-02jxl9BZ.xls的文件。因此，当您附加2019-03-02.xls时，您将附加一个不存在的文件，这就是异常告诉您的内容。
第二个问题是您传递的是相对文件名。相对文件名始终相对于Java进程的当前目录进行解析。这意味着如果您恰好从/ home / vgr目录运行，2019-03-02.xls与/home/vgr/2019-03-02.xls相同。但是永远不会在该位置创建临时文件，因此，您再次尝试附加一个不存在的文件。 （相对文件不是Java概念；数十年来，它们一直是操作系统的基本组成部分。）
解决方案是将file保留在一个字段中（如果您尚未这样做的话），并将其传递给attachFile方法：
excelAttach.attachFile(file);