0

在这里它工作得非常好,但是我没有使用收到的文件,而是使用文件路径我该怎么做我虽然将它转换为输入流会做一些好事,但没有输入流的构造函数请让我知道提前谢谢

@RequestMapping("/SendMail")
    public String mail(@RequestParam("prescription") MultipartFile prescription,@RequestParam("email") String email,HttpSession session) {
        try {
            customer ct=custServ.customerExists(email);
            InputStream in = prescription.getInputStream();
            String filename=prescription.getName();
            if(ct!=null){
                final String SEmail="email@gmail.com";
                final String SPass="passowrd";
                final String REmail=email;
                final String Sub="Your prescription is here!";
                //mail send Code
            Properties props=new Properties();
            props.put("mail.smtp.host","smtp.gmail.com");
            props.put("mail.smtp.socketFactory.port","465");
            props.put("mail.smtp.socketFactory.class","javax.net.ssl.SSLSocketFactory");
            props.put("mail.smtp.auth","true");
            props.put("mail.smtp.port","465");
            Session ses=Session.getInstance(props,
            new javax.mail.Authenticator() {
                protected PasswordAuthentication getPasswordAuthentication(){
                    return new PasswordAuthentication(SEmail,SPass);
                }
            }
            );
            Message message=new MimeMessage(ses);
            message.setFrom(new InternetAddress(SEmail));
            message.setRecipients(Message.RecipientType.TO, InternetAddress.parse(REmail));
            message.setSubject(Sub);
            
            BodyPart messageBodyPart = new MimeBodyPart();
             messageBodyPart.setText("This is your prescription here");
             Multipart multipart = new MimeMultipart();
            multipart.addBodyPart(messageBodyPart);
            messageBodyPart = new MimeBodyPart(); 
            
           // File filep=new File(prescription);
            DataSource source = new FileDataSource("C:\\Users\\Narci\\Desktop\\frontend\\Myqr3.jpg");
            messageBodyPart.setDataHandler(new DataHandler(source));
            messageBodyPart.setFileName(filename);
            multipart.addBodyPart(messageBodyPart);
             message.setContent(multipart);
            
            Transport.send(message);
            session.setAttribute("msg","Mail Sent successfully.");
            }
            else{
                session.setAttribute("msg", "Wrong Emial ID");
            }
            return "Doctor";
        }
        catch(Exception e) {
        e.printStackTrace();
        return "Error";
        }
    } ```

4

2 回答 2

0

解决方案

这个其他 Stack Overflow 答案 (这个答案作为社区 wiki 发布),您可以在前端获取文件对象并将其转换为 base64 对象,如下所示:

const toBase64 = file => new Promise((resolve, reject) => {
    const reader = new FileReader();
    reader.readAsDataURL(file);
    reader.onload = () => resolve(reader.result);
    reader.onerror = error => reject(error);
});

async function Main() {
   const file = document.querySelector('#myfile').files[0];
   console.log(await toBase64(file));
}

Main();

然后,使用此 Base64 对象,您可以将其发送到后端并PUT请求然后按照 Gmail API 说明将其附加到电子邮件以进行分段上传。

我希望这对你有所帮助。让我知道您是否需要其他任何内容,或者您​​是否不理解某些内容。:)

于 2020-09-17T07:15:53.230 回答
0

这有点像在黑暗中拍摄,因为我不相信我真正理解这个问题。如果问题是;我如何使用 File 而不是 MultipartFile 并获得 InputStream那么答案是使用现有的库Files.newInputStream,如 aPath作为参数。

Path path = Paths.get("path", "to", "my", "file");

try (InputStream input = Files.newInputStream(path)) {

}
于 2020-09-08T18:26:05.803 回答