前提：
qq邮箱要开通pop3服务协议，操作：qq邮箱-设置-账户-开启pop3，并记录生成的验证码。
执行代码：
public class MailUtil {
private static final String SSL_FACTORY = "javax.net.ssl.SSLSocketFactory";
private static final String SMTP_HOST = "smtp.qq.com";
private static final String SMTP_PORT = "465";
private static final String SMTP_USER = "[email protected]";
private static final String SMTP_SENDER = "[email protected]";
private static final String SMTP_PASSWORD = "******"; //******
public static boolean send(String toRecipient, String subject, String text) {
List<String> toRecipients = new ArrayList<>();
toRecipients.add(toRecipient);
return send(toRecipients, subject, text, false, null);
}
/**
* 邮件发送
* @param toRecipient 接收人
* @param subject 主题
* @param html 内容
* @return
*/
public static boolean sendHtml(String toRecipient, String subject, String html) {
List<String> toRecipients = new ArrayList<>();
toRecipients.add(toRecipient);
return send(toRecipients, subject, html, true, null);
}
public static boolean send(List<String> toRecipients, String subject, String content, boolean isHtml, List<String> attachmentNames) {
//验证和处理邮箱地址
if (SMTP_HOST == null || SMTP_PORT == null || SMTP_USER == null
|| SMTP_PASSWORD == null || SMTP_SENDER == null) {
return false;
}
if (toRecipients == null) {
return false;
}
Properties properties = new Properties();
properties.put("mail.smtp.host", SMTP_HOST);
properties.put("mail.smtp.auth", "true");
properties.put("mail.smtp.socketFactory.class", SSL_FACTORY);//使用JSSE的SSL socketfactory来取代默认的socketfactory
properties.put("mail.smtp.socketFactory.fallback", "false");//只处理SSL的连接,对于非SSL的连接不做处理
properties.put("mail.smtp.port", SMTP_PORT);
properties.put("mail.smtp.socketFactory.port", SMTP_PORT);
Session session = Session.getDefaultInstance(
properties, new Authenticator() {
protected PasswordAuthentication getPasswordAuthentication() {
return new PasswordAuthentication(SMTP_USER, SMTP_PASSWORD);
}
});
//session.setDebug(true); //debug信息
MimeMessage message = new MimeMessage(session);
try {
// 发件人
Address address = new InternetAddress(SMTP_SENDER);
message.setFrom(address);
// 收件人
for (String recipient : toRecipients) {
Address toAddress = new InternetAddress(recipient);
message.addRecipient(MimeMessage.RecipientType.TO, toAddress);
}
toRecipients.clear();
// 主题
message.setSubject(MimeUtility.encodeText(subject, "UTF-8", "B"));
// 时间
message.setSentDate(new Date());
// 主体
Multipart multipart = new MimeMultipart();
// 主体:正文
BodyPart bodyPart = new MimeBodyPart();
if (isHtml) {
bodyPart.setContent(content, "text/html; charset=utf-8");
} else {
bodyPart.setText(content);
}
multipart.addBodyPart(bodyPart);
// 主体:附件
if (attachmentNames != null && attachmentNames.size() > 0) {
for (String fileName : attachmentNames) {
BodyPart adjunct = new MimeBodyPart();
FileDataSource fileDataSource = new FileDataSource(fileName);
adjunct.setDataHandler(new DataHandler(fileDataSource));
adjunct.setFileName(MimeUtility.encodeText(fileDataSource.getName(), "UTF-8", "B"));
multipart.addBodyPart(adjunct);
}
attachmentNames.clear();
}
message.setContent(multipart);
message.saveChanges();
Transport.send(message);
return true;
} catch (Exception e) {
e.printStackTrace();
return false;
}
}
public static void main(String[] args) {
boolean result = sendHtml("[email protected]", "测试邮件", "<html><head></head><body><h1>你好</h1><p>这是正文, 这是<i>正文</i>.</p></body></html>");
System.out.println(result);
}
}