从 gmail 搜索电子邮件不起作用

Question

我遵循了这个：Reading email from gmail is not working，我能够获取所有电子邮件。但是，当我使用搜索参数时，我总是得到 0 个结果。这是我尝试过的：

  Date d1 = new DateTime(date.getTime()).toLocalDate().toDate();
  Date d2 = new DateTime(date.getTime()).plusDays(-30).toLocalDate().toDate();
  SearchTerm olderThan = new ReceivedDateTerm(ComparisonTerm.LT, d1);
  SearchTerm newerThan = new ReceivedDateTerm(ComparisonTerm.GT, d2);
  SearchTerm andTerm = new AndTerm(olderThan, newerThan);

  Message[] messages = emailFolder.search(andTerm);

如果我将最后一行更改为

  Message[] messages = emailFolder.getMessages();

一切正常，我收到所有电子邮件。我的收件箱中有过去 30 天内收到的电子邮件。我的搜索逻辑有问题吗？

Answer 1

您缺少下面的代码行，您必须覆盖 match 方法并将条件放在那里

    // creates a search criterion
    SearchTerm searchCondition = new SearchTerm() {
        @Override
        public boolean match(Message message) {
            try {
                if (message.getSubject().contains(keyword)) {
                    return true;
                }
            } catch (MessagingException ex) {
                ex.printStackTrace();
            }
            return false;
        }
    };

    // performs search through the folder
    Message[] foundMessages = folderInbox.search(searchCondition);

    for (int i = 0; i < foundMessages.length; i++) {
        Message message = foundMessages[i];
        String subject = message.getSubject();
        System.out.println("Found message #" + i + ": " + subject);
    }

编辑：-

SearchTerm andTerm = null;
andTerm = new AndTerm(andTerm, olderThan);  //concat the search terms
andTerm = new AndTerm(andTerm, newerThan );
Message messages[] = folderInbox.search(andTerm);    //search on the imap server

编辑 1：-

for (Message message : messages) {
    if (message.getSentDate().after(olderThan) && message.getSentDate().before(newerThan))
       {
          //do whatever you want with your filtered by period message
       } 
}