Javamail和Gmail获取消息

我有一个大学的gmail帐号

该账户由

student.university.com

所以如果我试着剪下这个：

Properties props = System.getProperties();
        props.setProperty("mail.store.protocol", "imaps");
        try {
            Session session = Session.getDefaultInstance(props, null);
            Store store = session.getStore("imaps");
            store.connect("mail.gmail.com", "username", "password");


            Folder inbox = store.getFolder("INBOX");
            inbox.open(Folder.READ_ONLY);
            Message msg = inbox.getMessage(inbox.getMessageCount());
            Address[] in = msg.getFrom();
            for (Address address : in) {
                System.out.println("FROM:" + address.toString());
            }
            Multipart mp = (Multipart) msg.getContent();
            BodyPart bp = mp.getBodyPart(0);
            System.out.println("SENT DATE:" + msg.getSentDate());
            System.out.println("SUBJECT:" + msg.getSubject());
            System.out.println("CONTENT:" + bp.getContent());
        } catch (Exception mex) {
            mex.printStackTrace();
        }

但如果我试图改变这一点，它就不起作用了：

    store.connect("student.university.com", "username", "pass");

还是不行。。。我错在哪里

编辑：2分钟后，我出现以下错误：

javax.mail.MessagingException: Connection timed out;
  nested exception is:
    java.net.ConnectException: Connection timed out;
    at com.sun.mail.imap.IMAPStore.protocolConnect(IMAPStore.java:670)
    at javax.mail.Service.connect(Service.java:295)
    at javax.mail.Service.connect(Service.java:176)
    at RetriveMail.main(RetriveMail.java:17)

如果我尝试使用Debug，我有：

DEBUG IMAPS: trying to connect to host "imap.gmail.com", port 993, isSSL true
* OK Gimap ready for requests from 151.40.212.208 p48if11656880wer.170
A0 CAPABILITY
* CAPABILITY IMAP4rev1 UNSELECT IDLE NAMESPACE QUOTA ID XLIST CHILDREN X-GM-EXT-1 XYZZY SASL-IR AUTH=XOAUTH AUTH=XOAUTH2 AUTH=PLAIN AUTH=PLAIN-CLIENTTOKEN
A0 OK Thats all she wrote! p48if11656880wer.170
DEBUG IMAPS: AUTH: XOAUTH
DEBUG IMAPS: AUTH: XOAUTH2
DEBUG IMAPS: AUTH: PLAIN
DEBUG IMAPS: AUTH: PLAIN-CLIENTTOKEN
DEBUG IMAPS: protocolConnect login, host=imap.gmail.com, user=username@student.university.com, password=<non-null>
DEBUG IMAPS: AUTHENTICATE PLAIN command trace suppressed
DEBUG IMAPS: AUTHENTICATE PLAIN command result: A1 NO [AUTHENTICATIONFAILED] Invalid credentials (Failure)

DEBUG IMAPS:尝试连接到主机“imap.gmail.com”，端口993，isSSL true
*OK Gimap准备好接受来自151.40.212.208 P48IF1165680WER.170的请求
A0能力
*功能IMAP4rev1取消选择空闲命名空间配额ID XLIST子项X-GM-EXT-1 XYZZY SASL-IR AUTH=XOATH AUTH=XOATUH2 AUTH=PLAIN AUTH=PLAIN-CLIENTTOKEN
好的，她就写这些！P48IF1165680WER.170
调试IMAPS:AUTH:XOAUTH
调试IMAPS:AUTH:XOAUTH2
调试IMAPS:AUTH:PLAIN
调试IMAPS:AUTH:PLAIN-CLIENTTOKEN
调试IMAPS:protocolConnect登录，主机=imap.gmail.com，用户=username@student.university.com，密码=
调试IMAPS:取消验证普通命令跟踪
调试IMAPS:验证普通命令结果：A1无[AUTHENTICATIONFAILED]无效凭据（失败）

它不工作怎么办？各位，真的很难想象事情会以多种方式失败吗？我没有任何反应。如果我尝试使用另一个帐户，但由Google direct works管理。@FelasDroid:定义“它不起作用”。错误是什么？当你调试这个时，它以什么方式失败？我编辑了带有错误的帖子