我有此代码可通过 IMAP 连接到 Gmail
public static Session getSessionGmail() throws GeneralSecurityException {
final Properties props = new Properties();
MailSSLSocketFactory sf = new MailSSLSocketFactory();
sf.setTrustAllHosts(true);
props.setProperty("mail.imap.host", "imap.gmail.com");
props.setProperty("mail.imap.user", gmailUsername);
props.setProperty("mail.imap.password", password);
props.setProperty("mail.imap.port", "993");
props.setProperty("mail.imap.auth", "true");
props.setProperty("mail.imap.starttls.enable", "true");
props.put("mail.imap.starttls.enable", "true");
props.put("mail.imap.ssl.socketFactory", sf);
Authenticator auth = new Authenticator() {
@Override
public PasswordAuthentication getPasswordAuthentication() {
return new PasswordAuthentication(gmailUsername, password);
}
};
return Session.getDefaultInstance(props, auth);
}
public static Folder openFolder(Session session, String folder) throws MessagingException {
Store store = session.getStore("imaps");
store.connect(gmailUsername, password);
Folder f = store.getFolder(folder);
f.open(Folder.READ_ONLY);
return f;
}
我总是遇到这个异常,指向 store.connect()
javax.mail.AuthenticationFailedException: failed to connect
at javax.mail.Service.connect(Service.java:332)
at javax.mail.Service.connect(Service.java:176)
at javax.mail.Service.connect(Service.java:196)
我查了Google的所有信息,如果我没猜错的话,IMAP的端口是993。用户名和密码绝对正确。我想我错过了一些东西,但我无法弄清楚。
任何帮助将不胜感激!
编辑
添加mail.debug后,我得到了这些日志,但我仍然停留在store.connect()
DEBUG: successfully loaded resource: /META-INF/javamail.default.providers
DEBUG: Tables of loaded providers
DEBUG: Providers Listed By Class Name: {com.sun.mail.smtp.SMTPSSLTransport=javax.mail.Provider[TRANSPORT,smtps,com.sun.mail.smtp.SMTPSSLTransport,Oracle], com.sun.mail.smtp.SMTPTransport=javax.mail.Provider[TRANSPORT,smtp,com.sun.mail.smtp.SMTPTransport,Oracle], com.sun.mail.imap.IMAPSSLStore=javax.mail.Provider[STORE,imaps,com.sun.mail.imap.IMAPSSLStore,Oracle], com.sun.mail.pop3.POP3SSLStore=javax.mail.Provider[STORE,pop3s,com.sun.mail.pop3.POP3SSLStore,Oracle], com.sun.mail.imap.IMAPStore=javax.mail.Provider[STORE,imap,com.sun.mail.imap.IMAPStore,Oracle], com.sun.mail.pop3.POP3Store=javax.mail.Provider[STORE,pop3,com.sun.mail.pop3.POP3Store,Oracle]}
DEBUG: Providers Listed By Protocol: {imaps=javax.mail.Provider[STORE,imaps,com.sun.mail.imap.IMAPSSLStore,Oracle], imap=javax.mail.Provider[STORE,imap,com.sun.mail.imap.IMAPStore,Oracle], smtps=javax.mail.Provider[TRANSPORT,smtps,com.sun.mail.smtp.SMTPSSLTransport,Oracle], pop3=javax.mail.Provider[STORE,pop3,com.sun.mail.pop3.POP3Store,Oracle], pop3s=javax.mail.Provider[STORE,pop3s,com.sun.mail.pop3.POP3SSLStore,Oracle], smtp=javax.mail.Provider[TRANSPORT,smtp,com.sun.mail.smtp.SMTPTransport,Oracle]}
DEBUG: successfully loaded resource: /META-INF/javamail.default.address.map
DEBUG: getProvider() returning javax.mail.Provider[STORE,imaps,com.sun.mail.imap.IMAPSSLStore,Oracle]
DEBUG IMAPS: mail.imap.fetchsize: 16384
DEBUG IMAPS: mail.imap.ignorebodystructuresize: false
DEBUG IMAPS: mail.imap.statuscachetimeout: 1000
DEBUG IMAPS: mail.imap.appendbuffersize: -1
DEBUG IMAPS: mail.imap.minidletime: 10
...
DEBUG IMAPS: protocolConnect login, host=imap.gmail.com, user=louis.t@gmail.com, password=<non-null>
DEBUG IMAPS: AUTHENTICATE PLAIN command trace suppressed
DEBUG IMAPS: AUTHENTICATE PLAIN command result: A1 NO [ALERT] Please log in via your web browser:
它已登录,但仍停留在连接状态..
最佳答案
尝试这样(注意字符串中的 imaps)
sf.setTrustAllHosts(true);
props.setProperty("mail.imaps.host", "imap.gmail.com");
props.setProperty("mail.imaps.user", gmailUsername);
props.setProperty("mail.imaps.password", password);
props.setProperty("mail.imaps.port", "993");
props.setProperty("mail.imaps.auth", "true");
props.setProperty("mail.debug", "true");
我遇到了“从不安全的设备连接”的错误 - 但在 gmail 设置中有一个已知的解决方法。
关于java - 无法使用 IMAP 连接到 Gmail,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/34615522/