Want to read something of your gmail (not only subject but body content too) using javax Lib?

Want to read something of your Gmail (not only subject but body content too) using javax Lib? For contentBody where MimeType is "text/plain" i.e. it's a plain text message, it works straight forward by using getContent() method but in case you have contentBody MimeType= text/html i.e. the message body only in HTML, you need to take care of Multipart for multipart/alternative and multipart/mixed based on your requirements.


Here's the working code:

Note* You still need to tweak the code based on your requirements like if there are more than 1 unread or read emails having the same subject that you are trying to look for in the subject like by setting Flags.Flag.DELETED=True before reading this new email or using Flags.Flag.RECENT=True.

You may need to enable less secure apps to use JavaMail with Gmail: https://myaccount.google.com/lesssecureapps

// userName is your gmail userName
// password is your gmail password
// subjectToContains is what you need to look for in the target Email Subject
public static boolean readMailContent(String userName, String password, String subjectToContains) {

Folder folder = null;
Store store = null;
System.out.println("***READING MAILBOX...");
try {
Properties props = new Properties();
props.put("mail.store.protocol", "imaps");
Session session = Session.getInstance(props);
store = session.getStore("imaps");
store.connect("imap.gmail.com", userName, password);
folder = store.getFolder("INBOX");
folder.open(Folder.READ_ONLY);
Message[] messages = folder.getMessages();
System.out.println("No of Messages : " + folder.getMessageCount());
System.out.println("No of Unread Messages : " + folder.getUnreadMessageCount());
for (int i = 0; i < messages.length; i++) {
System.out.println("Reading MESSAGE # " + (i + 1) + "...");
Message msg = messages[i];
String strMailSubject = "", strMailBody = "";
// Getting mail subject
Object subject = msg.getSubject();
// Getting mail body
Object content = msg.getContent();

// Casting objects of mail subject and body into String
strMailSubject = (String) subject;
strMailBody = content.toString();
// ---- This is what you want to do for fetching Subject and body------
if (strMailSubject.contains(subjectToContains)) {
System.out.println(strMailSubject);
if (content instanceof String) {
String body = (String) content;
System.out.println((String) msg.getContent());

} else if (content instanceof Multipart) {

Multipart mp = (Multipart) content;
Multipart contentBody = (Multipart) content;
BodyPart htmlTextPart = null;
int count = contentBody.getCount();
for (int j = 0; j < count; j++) {
BodyPart part = contentBody.getBodyPart(j);

if (part.isMimeType("text/html")) {
htmlTextPart = part;
String html = (String) htmlTextPart.getContent();
System.out.println("Your Body text is: "+ html);

}


}
}

break;
}
}
return true;
} catch (MessagingException messagingException) {
messagingException.printStackTrace();
} catch (IOException ioException) {
ioException.printStackTrace();
} finally {
if (folder != null) {
try {
folder.close(true);
} catch (MessagingException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
if (store != null) {
try {
store.close();
} catch (MessagingException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
return false;
}

Here's the dependency that you need to add in your pom file:

<dependency>
<groupId>javax.mail</groupId>
<artifactId>mail</artifactId>
<version>1.4.7</version>
</dependency>