使用Java实现邮件发送功能，邮件发送API JavaMail

package cn.harry.utils; import javax.activation.DataHandler; import javax.activation.DataSource; import javax.activation.FileDataSource; import javax.mail.*; import javax.mail.internet.InternetAddress; import javax.mail.internet.MimeBodyPart; import javax.mail.internet.MimeMessage; import javax.mail.internet.MimeMultipart; import java.util.Properties; /** * @author harry * @公众号 Harry技术 */ public class AttachmentEmailSender { public static void main(String[] args) { System.setProperty("javax.net.debug", "ssl,handshake"); // 邮件服务器配置 String host = "smtp.qq.com"; final String user = "XXXX@qq.com"; // 发件人邮箱 final String password = "XXXXX"; // 发件人密码 // 收件人邮箱 String to = "XXXXX@qq.com"; // 配置属性 Properties props = new Properties(); props.put("mail.smtp.host", host); props.put("mail.smtp.auth", "true"); props.put("mail.smtp.port", "587"); props.put("mail.smtp.starttls.enable", "true"); // 获取默认session对象 Session session = Session.getInstance(props, new javax.mail.Authenticator() { @Override protected PasswordAuthentication getPasswordAuthentication() { return new PasswordAuthentication(user, password); } }); try { // 创建邮件对象 Message message = new MimeMessage(session); message.setFrom(new InternetAddress(user)); message.setRecipients(Message.RecipientType.TO, InternetAddress.parse(to)); message.setSubject("Mail with Attachment from Java"); // 创建消息部分 BodyPart messageBodyPart = new MimeBodyPart(); messageBodyPart.setText("This is message body"); // 创建多部分 Multipart multipart = new MimeMultipart(); multipart.addBodyPart(messageBodyPart); // 第二部分是附件 messageBodyPart = new MimeBodyPart(); // 附件路径 String filename = "path-to-file"; DataSource source = new FileDataSource(filename); messageBodyPart.setDataHandler(new DataHandler(source)); messageBodyPart.setFileName(filename); multipart.addBodyPart(messageBodyPart); // 设置完整消息 message.setContent(multipart); // 发送邮件 Transport.send(message); System.out.println("Mail sent successfully!"); } catch (MessagingException e) { e.printStackTrace(); } } }