javamail read mail

gistfile1.java

@Test
public String readMailTest() throws Exception {

	Properties props = new Properties();
	props.put("mail.imap.host", "imap.sina.cn");
	Session session = Session.getDefaultInstance(props);
	IMAPStore store = (IMAPStore) session.getStore("imap");
	store.connect("sgmall_test_001", "sgmall_test_001");

	Folder emailFolder = store.getFolder("INBOX");
	emailFolder.open(Folder.READ_WRITE);

	try {
		Calendar c = Calendar.getInstance();
		c.add(Calendar.SECOND, -15);
		SentDateTerm date = new SentDateTerm(ComparisonTerm.GT, c.getTime());// 15sec 以内的
		NotTerm not = new NotTerm(new BodyTerm("退回邮件"));
		BodyTerm body = new BodyTerm("验证码为(\\d+)");
		FlagTerm notSeen = new FlagTerm(new Flags(Flag.SEEN), false);
		// SearchTerm term = new SearchTerm();
		Message[] messages = emailFolder.search(new AndTerm(new SearchTerm[] { not, body, date, notSeen }));
		int countdown = 5;
		while(messages.length == 0 && countdown > 0) {
			messages = emailFolder.search(new AndTerm(new SearchTerm[] { not, body, date, notSeen }));
			countdown--;
			Thread.sleep(12000);
		}
		if (messages.length == 0) {
			throw new RuntimeException("no matching mail found in limited timespan");
		}
		if (messages.length > 1) {
			throw new RuntimeException("too many mails found, slow down, don't be hurry");
		}
		Message message = messages[messages.length - 1];
		MimeMultipart part = (MimeMultipart) message.getContent();
		part = (MimeMultipart) part.getBodyPart(0).getContent();
		String bodyString = part.getBodyPart(0).getContent().toString();

		Pattern ptn = Pattern.compile("验证码为(\\d+)");
		Matcher m = ptn.matcher(bodyString);
		m.find();
		return m.group(1);

	} finally {
		emailFolder.close(true);
		store.close();
	}
}