Java---通过smtp模拟发信

可以通过邮件的smtp协议发送邮件

public class MailUtil { public static MimeMessage createMimeMessage(Session session, String sendMail, String receivename, String receiveMail, String subject, String content) throws Exception { // 1. 创建一封邮件 MimeMessage message = new MimeMessage(session); // 2. From: 发件人 message.setFrom(new InternetAddress(sendMail, "发件人名称", "UTF-8")); // 3. To: 收件人（可以增加多个收件人、抄送、密送） message.setRecipient(MimeMessage.RecipientType.TO, new InternetAddress(receiveMail, receivename, "UTF-8")); // 4. Subject: 邮件主题 message.setSubject(subject, "UTF-8"); // 5. Content: 邮件正文（可以使用html标签） MimeBodyPart text = new MimeBodyPart(); text.setContent(content, "text/html;charset=UTF-8"); MimeMultipart mp = new MimeMultipart(); mp.addBodyPart(text); mp.setSubType("mixed"); message.setContent(mp); message.saveChanges(); // 6. 设置发件时间 message.setSentDate(new Date()); // 7. 保存设置 message.saveChanges(); return message; } public static void sendmail(String content,String recivemail) throws Exception{ Properties props = new Properties(); props.put("mail.smtp.host", "smtp服务器地址"); props.put("mail.smtp.starttls.enable","true");//使用 STARTTLS安全连接 props.put("mail.smtp.port", "smtp服务器端口"); //google使用465或587端口 props.put("mail.smtp.auth", "true"); // 使用验证 props.put("mail.debug", "true"); Session mailSession = Session.getInstance(props,new MyAuthenticator("发信的邮箱地址","发信的邮箱密码")); Transport transport = mailSession.getTransport("smtp"); transport.connect("smtp服务器地址","发信的邮箱地址","发信的邮箱密码"); MimeMessage m=MailUtil.createMimeMessage(mailSession, "发件邮箱","收件人姓名", recivemail,"主题",content); transport.sendMessage(m, m.getAllRecipients()); transport.close(); } } class MyAuthenticator extends Authenticator{ String userName=""; String password=""; public MyAuthenticator(){ } public MyAuthenticator(String userName,String password){ this.userName=userName; this.password=password; } protected PasswordAuthentication getPasswordAuthentication(){ return new PasswordAuthentication(userName, password); } }