Filter emails by domain using javamail

问题

I'm using javamail to download emails, but now I need to filter some email address by domain.

I try to use the FromStringTerm but I can't know the correct pattern to filter it.

edit 1: the jmehrens solved partially my problem. I would like to filter when i get messages from folder, something like:

            Store store = session.getStore("imap");
            store.connect(configc.host, configc.email, configc.pass);
            Folder folderInbox = store.getFolder("INBOX");
            folderInbox.open(Folder.READ_ONLY);

            Message[] arrayMessages1 = folderInbox.search(??);

How can I filter by domain at this point?

回答1:

The FromStringTerm inherits the behavior described in javax.mail.search.SearchTerm:

This class implements the match method for Strings. The current implementation provides only for substring matching. We could add comparisons (like strcmp ...).

So there is no pattern as it performs substring matching out of the box.

Here is a test case:

public class DomainMatch {

    public static void main(String[] args) throws Exception {
        MimeMessage msg = new MimeMessage((Session) null);
        msg.addFrom(InternetAddress.parse("foo@bar.org"));
        msg.saveChanges();

        System.out.println(new FromStringTerm("@bar.org").match(msg));
        System.out.println(new FromStringTerm("@spam.org").match(msg));
    }
}

Using the javax.mail.Folder::search documentation you would write something like:

Store store = session.getStore("imap");
store.connect(configc.host, configc.email, configc.pass);
Folder folderInbox = store.getFolder("INBOX");
folderInbox.open(Folder.READ_ONLY);

Message[] onlyBarOrg = folderInbox.search(new FromStringTerm("@bar.org"));

来源：https://stackoverflow.com/questions/40895033/filter-emails-by-domain-using-javamail