Java如何通过TLS使用Gmail发送电子邮件？
以下示例显示了如何通过TLS连接使用GmailSMTP发送电子邮件。中username和password是用于验证您对Gmail的。
createConfiguration()方法中定义了用于连接到GmailSMTP的配置/属性。这些属性包括诸如SMTP主机地址，端口号等信息。
要通过SSL使用Gmail发送电子邮件，请参见以下代码片段。如何通过SSL使用Gmail发送电子邮件？
让我们看看下面的代码片段：
package org.nhooo.example.mail;
import javax.mail.*;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeMessage;
import java.util.Date;
import java.util.Properties;
public class GmailSendEmailTLS {
private static final String USERNAME = "nhooo";
private static final String PASSWORD = "********";
public static void main(String[] args) throws Exception {
//电子邮件信息，例如从，到，主题和内容。
String mailFrom = "nhooo@gmail.com";
String mailTo = "nhooo@gmail.com";
String mailSubject = "TLS - Gmail Send Email Demo";
String mailText = "TLS - Gmail Send Email Demo";
GmailSendEmailTLS gmail = new GmailSendEmailTLS();
gmail.sendMail(mailFrom, mailTo, mailSubject, mailText);
}
private void sendMail(String mailFrom, String mailTo, String mailSubject,
String mailText) throws Exception {
Properties config = createConfiguration();
//创建一个邮件会话。我们需要提供用户名和
//Gmail验证的密码。
Session session = Session.getInstance(config, new Authenticator() {
@Override
protected PasswordAuthentication getPasswordAuthentication() {
return new PasswordAuthentication(
GmailSendEmailTLS.USERNAME,
GmailSendEmailTLS.PASSWORD
);
}
});
//创建电子邮件
Message message = new MimeMessage(session);
message.setSentDate(new Date());
message.setFrom(new InternetAddress(mailFrom));
message.setRecipient(Message.RecipientType.TO,
new InternetAddress(mailTo));
message.setSubject(mailSubject);
message.setText(mailText);
//发送消息
Transport.send(message, GmailSendEmailTLS.USERNAME, GmailSendEmailTLS.PASSWORD);
}
private Properties createConfiguration() {
return new Properties() {{
put("mail.smtp.auth", "true");
put("mail.smtp.host", "smtp.gmail.com");
put("mail.smtp.port", "587");
put("mail.smtp.starttls.enable", "true");
}};
}
}Maven依赖
<!-- http://repo1.maven.org/maven2/javax/mail/javax.mail-api/1.5.6/javax.mail-api-1.5.6.jar -->
<dependency>
<groupId>javax.mail</groupId>
<artifactId>javax.mail-api</artifactId>
<version>1.5.6</version>
</dependency>
<!-- http://repo1.maven.org/maven2/javax/mail/mail/1.4.7/mail-1.4.7.jar -->
<dependency>
<groupId>javax.mail</groupId>
<artifactId>mail</artifactId>
<version>1.4.7</version>
</dependency>