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Ek Olarak Büyük Resimli Java MailAPI Kullanarak E-posta Nasıl Gönderilir

Yayınlanan: 2014-03-17

JavaMail API, posta ve mesajlaşma uygulamaları oluşturmak için platformdan bağımsız ve protokolden bağımsız bir çerçeve sağlar. JavaMail API, Java SE platformuyla kullanım için isteğe bağlı bir paket olarak mevcuttur ve ayrıca Java EE platformuna dahildir. JavaMail 1.4.5 sürümü, çeşitli hata düzeltmeleri ve geliştirmeler içerir.

Bir süre önce Gmail SMTP (TLS Kimlik Doğrulaması) kullanarak, ancak Resim Eki olmadan bir e-posta gönderme konusunda bir Eğitim yazdım. Aşağıdaki Java Eğitimi, ek olarak bir e-posta ile Büyük Resim göndermenize yardımcı olacaktır.

Bazen e- postaya bir resim eklemek ve ardından bunu e-posta gövdesinde kullanmak isteriz. Resim ekleri olan ve aynı zamanda e-posta mesajında ​​kullanılan çok sayıda e-posta görmüş olmalısınız. İşin püf noktası, görüntü dosyasını herhangi bir ek gibi eklemek ve ardından görüntü dosyası için Content-ID başlığını ayarlamak ve ardından e-posta mesajı gövdesinde <img src='cid:image_id'> ile aynı içerik kimliğini kullanmaktır.

İşte basit bir Java Programı:

CrunchifyJavaMailWithImageAttachment.java
Java
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package com . crunchify . tutorials ;
 
import java . io . UnsupportedEncodingException ;
import java . util . Date ;
import java . util . Properties ;
 
import javax . activation . DataHandler ;
import javax . activation . DataSource ;
import javax . activation . FileDataSource ;
import javax . mail . Authenticator ;
import javax . mail . BodyPart ;
import javax . mail . Message ;
import javax . mail . MessagingException ;
import javax . mail . Multipart ;
import javax . mail . PasswordAuthentication ;
import javax . mail . Session ;
import javax . mail . Transport ;
import javax . mail . internet . AddressException ;
import javax . mail . internet . InternetAddress ;
import javax . mail . internet . MimeBodyPart ;
import javax . mail . internet . MimeMessage ;
import javax . mail . internet . MimeMultipart ;
 
/**
* @author Crunchify.com
*
*/
 
public class CrunchifyJavaMailWithImageAttachment {
 
     static Properties mailServerProperties ;
     static Session getMailSession ;
     static MimeMessage msg ;
 
     public static void main ( String args [ ] ) throws AddressException , MessagingException {
 
         System . out . println ( "\n1st ===> setup Mail Server Properties.." ) ;
 
         final String sourceEmail = "<Your Gmail Email ID" ; // requires valid Gmail id
         final String password = "Your Gmail Password" ; // correct password for Gmail id
         final String toEmail = "[email protected]" ; // any destination email id
 
         Properties props = new Properties ( ) ;
         props . put ( "mail.smtp.host" , "smtp.gmail.com" ) ;
         props . put ( "mail.smtp.port" , "587" ) ;
         props . put ( "mail.smtp.auth" , "true" ) ;
         props . put ( "mail.smtp.starttls.enable" , "true" ) ;
 
         System . out
                 . println ( "\n2nd ===> create Authenticator object to pass in Session.getInstance argument.." ) ;
 
         Authenticator authentication = new Authenticator ( ) {
             protected PasswordAuthentication getPasswordAuthentication ( ) {
                 return new PasswordAuthentication ( sourceEmail , password ) ;
             }
         } ;
         Session session = Session . getInstance ( props , authentication ) ;
         generateAndSendEmail (
                 session ,
                 toEmail ,
                 "Crunchify's JavaMail API example with Image Attachment" ,
                 "Greetings, <br><br>Test email by Crunchify.com JavaMail API example. Please find here attached Image."
                        + "<br><br> Regards, <br>Crunchify Admin" ) ;
 
     }
 
     public static void generateAndSendEmail ( Session session , String toEmail , String subject ,
             String body ) {
         try {
             System . out . println ( "\n3rd ===> generateAndSendEmail() starts.." ) ;
 
             MimeMessage crunchifyMessage = new MimeMessage ( session ) ;
             crunchifyMessage . addHeader ( "Content-type" , "text/HTML; charset=UTF-8" ) ;
             crunchifyMessage . addHeader ( "format" , "flowed" ) ;
             crunchifyMessage . addHeader ( "Content-Transfer-Encoding" , "8bit" ) ;
 
             crunchifyMessage . setFrom ( new InternetAddress ( "[email protected]" ,
                     "NoReply-Crunchify" ) ) ;
             crunchifyMessage . setReplyTo ( InternetAddress . parse ( "[email protected]" , false ) ) ;
             crunchifyMessage . setSubject ( subject , "UTF-8" ) ;
             crunchifyMessage . setSentDate ( new Date ( ) ) ;
             crunchifyMessage . setRecipients ( Message . RecipientType . TO ,
                     InternetAddress . parse ( toEmail , false ) ) ;
 
             // Create the message body part
             BodyPart messageBodyPart = new MimeBodyPart ( ) ;
             messageBodyPart . setContent ( body , "text/html" ) ;
 
             // Create a multipart message for attachment
             Multipart multipart = new MimeMultipart ( ) ;
 
             // Set text message part
             multipart . addBodyPart ( messageBodyPart ) ;
 
             messageBodyPart = new MimeBodyPart ( ) ;
 
             // Valid file location
             String filename = "/Users/<username>//cdn.crunchify.com/Desktop/JavaMailAPIwithImage-CrunchifyExample.png" ;
             DataSource source = new FileDataSource ( filename ) ;
             messageBodyPart . setDataHandler ( new DataHandler ( source ) ) ;
             messageBodyPart . setFileName ( filename ) ;
             // Trick is to add the content-id header here
             messageBodyPart . setHeader ( "Content-ID" , "image_id" ) ;
             multipart . addBodyPart ( messageBodyPart ) ;
 
             System . out . println ( "\n4th ===> third part for displaying image in the email body.." ) ;
             messageBodyPart = new MimeBodyPart ( ) ;
             messageBodyPart . setContent ( "<br><h3>Find below attached image</h3>"
                    + "<img src='cid:image_id'>" , "text/html" ) ;
             multipart . addBodyPart ( messageBodyPart ) ;
             crunchifyMessage . setContent ( multipart ) ;
 
             System . out . println ( "\n5th ===> Finally Send message.." ) ;
 
             // Finally Send message
             Transport . send ( crunchifyMessage ) ;
 
             System . out
                     . println ( "\n6th ===> Email Sent Successfully With Image Attachment. Check your email now.." ) ;
             System . out . println ( "\n7th ===> generateAndSendEmail() ends.." ) ;
 
         } catch ( MessagingException e ) {
             e . printStackTrace ( ) ;
         } catch ( UnsupportedEncodingException e ) {
             e . printStackTrace ( ) ;
         }
     }
}

Çıktı:

Output
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1st === > setup Mail Server Properties . .
 
2nd === > create Authenticator object to pass in Session . getInstance argument . .
 
3rd === > generateAndSendEmail ( ) starts . .
 
4th === > third part for displaying image in the email body . .
 
5th === > Finally Send message . .
 
6th === > Email Sent Successfully With Image Attachment . Check your email now . .
 
7th === > generateAndSendEmail ( ) ends . .

Örnek Ekran Görüntüsü:

JavaMailAPIwithImage - Örneği Crunchify