此程序尝试发送电子邮件但会引发运行时异常:
javax.mail.AuthenticationFailedException: failed to connect, no password specified?
为我提供正确的用户名和密码进行身份验证时,为什么会出现此异常?
发件人和收件人都有g-mail帐户。发件人和收件人都有g-mail帐号。发件人已禁用两步验证流程。
这是代码:
import javax.mail.*;
import javax.mail.internet.*;
import java.util.*;
class tester {
public static void main(String args[]) {
Properties props = new Properties();
props.put("mail.smtp.host" , "smtp.gmail.com");
props.put("mail.stmp.user" , "username");
//To use TLS
props.put("mail.smtp.auth", "true");
props.put("mail.smtp.starttls.enable", "true");
props.put("mail.smtp.password", "password");
//To use SSL
props.put("mail.smtp.socketFactory.port", "465");
props.put("mail.smtp.socketFactory.class",
"javax.net.ssl.SSLSocketFactory");
props.put("mail.smtp.auth", "true");
props.put("mail.smtp.port", "465");
Session session = Session.getDefaultInstance( props , null);
String to = "me@gmail.com";
String from = "from@gmail.com";
String subject = "Testing...";
Message msg = new MimeMessage(session);
try {
msg.setFrom(new InternetAddress(from));
msg.setRecipient(Message.RecipientType.TO,
new InternetAddress(to));
msg.setSubject(subject);
msg.setText("Working fine..!");
Transport transport = session.getTransport("smtp");
transport.connect("smtp.gmail.com" , 465 , "username", "password");
transport.send(msg);
System.out.println("fine!!");
}
catch(Exception exc) {
System.out.println(exc);
}
}
}
即使在给出密码后我也得到了例外。为什么不进行身份验证?
答案 0 :(得分:10)
您需要将对象身份验证作为参数添加到会话中。比如
Session session = Session.getDefaultInstance(props,
new javax.mail.Authenticator(){
protected PasswordAuthentication getPasswordAuthentication() {
return new PasswordAuthentication(
"XXXX@gmail.com", "XXXXX");// Specify the Username and the PassWord
}
});
现在你不会得到这种例外......
javax.mail.AuthenticationFailedException: failed to connect, no password specified?
答案 1 :(得分:9)
尝试创建一个javax.mail.Authenticator对象,并将其与属性对象一起发送到Session对象。
Authenticator 编辑:
您可以修改此选项以接受用户名和密码,您可以将其存储在那里或任何您想要的位置。
public class SmtpAuthenticator extends Authenticator {
public SmtpAuthenticator() {
super();
}
@Override
public PasswordAuthentication getPasswordAuthentication() {
String username = "user";
String password = "password";
if ((username != null) && (username.length() > 0) && (password != null)
&& (password.length () > 0)) {
return new PasswordAuthentication(username, password);
}
return null;
}
在您发送电子邮件的班级中:
SmtpAuthenticator authentication = new SmtpAuthenticator();
javax.mail.Message msg = new MimeMessage(Session
.getDefaultInstance(emailProperties, authenticator));
答案 2 :(得分:3)
您的电子邮件会话应提供验证者实例,如下所示
Session session = Session.getDefaultInstance(props,
new Authenticator() {
protected PasswordAuthentication getPasswordAuthentication() {
return new PasswordAuthentication(
"myemail@gmail.com", "password");
}
});
这里有一个完整的例子http://bharatonjava.wordpress.com/2012/08/27/sending-email-using-java-mail-api/
答案 3 :(得分:2)
除了RMT的回答。我也不得不修改一下代码。
这是我的示例send()方法。配置对象只是一个愚蠢的数据容器。
public boolean send(String to, String from, String subject, String text) {
return send(new String[] {to}, from, subject, text);
}
public boolean send(String[] to, String from, String subject, String text) {
Properties props = new Properties();
props.put("mail.smtp.auth", "true");
props.put("mail.smtp.host", config.host);
props.put("mail.smtp.user", config.username);
props.put("mail.smtp.port", config.port);
props.put("mail.smtp.password", config.password);
Session session = Session.getInstance(props, new SmtpAuthenticator(config));
try {
Message message = new MimeMessage(session);
message.setFrom(new InternetAddress(from));
InternetAddress[] addressTo = new InternetAddress[to.length];
for (int i = 0; i < to.length; i++) {
addressTo[i] = new InternetAddress(to[i]);
}
message.setRecipients(Message.RecipientType.TO, addressTo);
message.setSubject(subject);
message.setText(text);
Transport.send(message);
} catch (MessagingException e) {
e.printStackTrace();
return false;
}
return true;
}
答案 4 :(得分:2)
我已在Transport.send
电话中解决了此问题添加用户和密码:
Transport.send(msg, "user", "password");
根据javax.mail中send
function的签名(来自version 1.5 ):
public static void send(Message msg, String user, String password)
此外,如果您使用此签名,则无需设置任何Authenticator
,并在Properties
中设置用户和密码(仅需要主机)。所以你的代码可能是:
private void sendMail(){
try{
Properties prop = System.getProperties();
prop.put("mail.smtp.host", "yourHost");
Session session = Session.getInstance(prop);
Message msg = #createYourMsg(session, from, to, subject, mailer, yatta yatta...)#;
Transport.send(msg, "user", "password");
}catch(Exception exc) {
// Deal with it! :)
}
}
答案 5 :(得分:1)
可能值得验证gmail帐户由于多次登录尝试失败而未被锁定,您可能需要重置密码。我和你有同样的问题,结果证明这是解决方案。
答案 6 :(得分:1)
我也有这个问题所以不用担心。由于外部身份验证问题,它来自邮件服务器端。打开邮件,您将收到来自邮件服务器的邮件,告知您启用辅助功能。完成后,重试您的程序。
答案 7 :(得分:0)
import java.util.Properties;
import javax.mail.Authenticator;
import javax.mail.Message;
import javax.mail.MessagingException;
import javax.mail.PasswordAuthentication;
import javax.mail.Session;
import javax.mail.Transport;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeMessage;
import com.opensymphony.xwork2.ActionSupport;
import com.opensymphony.xwork2.ModelDriven;
@SuppressWarnings("serial")
public class RegisterAction {
public String execute() {
RegisterAction mailBean = new RegisterAction();
String subject="Your username & password ";
String message="Hi," + username;
message+="\n \n Your username is " + email;
message+="\n \n Your password is " + password;
message+="\n \n Please login to the web site with your username and password.";
message+="\n \n Thanks";
message+="\n \n \n Regards";
//Getting FROM_MAIL
String[] recipients = new String[1];
recipients[0] = new String();
recipients[0] = customer.getEmail();
try{
mailBean.sendMail(recipients,subject,message);
return "success";
}catch(Exception e){
System.out.println("Error in sending mail:"+e);
}
return "failure";
}
public void sendMail( String recipients[ ], String subject, String message)
throws MessagingException
{
boolean debug = false;
//Set the host smtp address
Properties props = new Properties();
props.put("mail.smtp.host", "smtp.gmail.com");
props.put("mail.smtp.starttls.enable", true);
props.put("mail.smtp.auth", true);
// create some properties and get the default Session
Session session = Session.getDefaultInstance(props, new Authenticator() {
protected PasswordAuthentication getPasswordAuthentication() {
return new PasswordAuthentication(
"username@gmail.com", "5373273437543");// Specify the Username and the PassWord
}
});
session.setDebug(debug);
// create a message
Message msg = new MimeMessage(session);
InternetAddress[] addressTo = new InternetAddress[recipients.length];
for (int i = 0; i < recipients.length; i++)
{
addressTo[i] = new InternetAddress(recipients[i]);
}
msg.setRecipients(Message.RecipientType.TO, addressTo);
// Optional : You can also set your custom headers in the Email if you Want
//msg.addHeader("MyHeaderName", "myHeaderValue");
// Setting the Subject and Content Type
msg.setSubject(subject);
msg.setContent(message, "text/plain");
//send message
Transport.send(msg);
System.out.println("Message Sent Successfully");
}
}
答案 8 :(得分:0)
即使使用Authenticator,我也必须将mail.smtp.auth属性设置为true。这是一个有效的例子:
final Properties props = new Properties();
props.put("mail.smtp.host", config.getSmtpHost());
props.setProperty("mail.smtp.auth", "true");
Session session = Session.getDefaultInstance(props, new javax.mail.Authenticator()
{
protected PasswordAuthentication getPasswordAuthentication()
{
return new PasswordAuthentication(config.getSmtpUser(), config.getSmtpPassword());
}
});
答案 9 :(得分:0)
开启&#34;访问不太安全的应用&#34;在gmail帐户的安全设置中(来自邮件),请参阅以下链接以获取参考资料
http://www.ghacks.net/2014/07/21/gmail-starts-block-less-secure-apps-enable-access/
答案 10 :(得分:0)
此错误可能与密码字符有关。如果您的密码包含特殊字符,并且您还将密码添加到Transport
类方法中;
例如
Transport transport = session.getTransport("smtp");
transport.connect("user","passw@rd");
或
Transport.send(msg, "user", "passw%rd");
您可能会收到该错误。因为Transport
类'方法可能无法处理特殊字符。如果您使用javax.mail.PasswordAuthentication
课程将您的用户名和密码添加到邮件中,我希望您能够避免该错误;
例如
...
Session session = Session.getInstance(props, new javax.mail.Authenticator()
{
protected PasswordAuthentication getPasswordAuthentication()
{
return new PasswordAuthentication("user", "pas$w@r|d");
}
});
Message message = new MimeMessage(session);
...
Transport.send(message);
答案 11 :(得分:0)
请参见代码的9行,可能是错误;应该是:
mail.smtp.user
不是
mail.stmp.user;
答案 12 :(得分:0)
首先,在您的Gmail帐户中启用安全性较低的应用程序,您可以使用以下链接从中发送电子邮件:-https://myaccount.google.com/lesssecureapps?pli=1
然后,您只需在会话创建中添加以下代码。它将正常工作。
Session mailSession = Session.getInstance(props, new javax.mail.Authenticator(){
protected PasswordAuthentication getPasswordAuthentication() {
return new PasswordAuthentication(
"your_email", "your_password");// Specify the Username and the PassWord
}
});
如果您想要更详细的说明,请使用以下命令:-
import java.util.Properties;
import javax.mail.Message;
import javax.mail.MessagingException;
import javax.mail.NoSuchProviderException;
import javax.mail.PasswordAuthentication;
import javax.mail.Session;
import javax.mail.Transport;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeBodyPart;
import javax.mail.internet.MimeMessage;
import javax.mail.internet.MimeMultipart;
public class MailSender {
public Properties mailProperties() {
Properties props = new Properties();
props.setProperty("mail.transport.protocol", "smtp");
props.setProperty("mail.smtp.host", "smtp.gmail.com");
props.setProperty("mail.smtp.port", "587");
props.setProperty("mail.smtp.user", "your_email");
props.setProperty("mail.smtp.password", "your_password");
props.setProperty("mail.smtp.starttls.enable", "true");
props.setProperty("mail.smtp.auth", "true");
return props;
}
public String sendMail(String from, String to, String subject, String msgBody) {
Properties props = mailProperties();
Session mailSession = Session.getInstance(props, new javax.mail.Authenticator(){
protected PasswordAuthentication getPasswordAuthentication() {
return new PasswordAuthentication(
"your_email", "your_password");// Specify the Username and the PassWord
}
});
mailSession.setDebug(false);
try {
Transport transport = mailSession.getTransport();
MimeMessage message = new MimeMessage(mailSession);
message.setSubject(subject);
message.setFrom(new InternetAddress(from));
message.addRecipients(Message.RecipientType.TO, to);
MimeMultipart multipart = new MimeMultipart();
MimeBodyPart messageBodyPart = new MimeBodyPart();
messageBodyPart.setContent(msgBody, "text/html");
multipart.addBodyPart(messageBodyPart);
message.setContent(multipart);
transport.connect();
transport.sendMessage(message, message.getRecipients(Message.RecipientType.TO));
transport.close();
return "SUCCESS";
} catch (NoSuchProviderException e) {
e.printStackTrace();
return "INVALID_EMAIL";
} catch (MessagingException e) {
e.printStackTrace();
}
return "ERROR";
}
public static void main(String args[]) {
System.out.println(new MailSender().sendMail("your_email/from_email", "to_email", "Subject", "Message"));
}
}
希望!它有助于。谢谢!
答案 13 :(得分:-1)
我刚遇到这个问题,解决方法是“mail.smtp.user”属性应该是您的电子邮件(不是用户名)。
gmail用户的示例:
properties.put("mail.smtp.starttls.enable", "true");
properties.put("mail.smtp.host", host);
properties.put("mail.smtp.user", from);
properties.put("mail.smtp.password", pass);
properties.put("mail.smtp.port", "587");
properties.put("mail.smtp.auth", "true");