邮件发送实现

说明

通过smtp实现邮件发送功能

引入pom.xml

<dependency>
    <groupId>com.sun.mail</groupId>
    <artifactId>javax.mail</artifactId>
    <version>1.6.2</version>
</dependency>

源码

/**
     * 发送邮件
     * @param username 发送者账号
     * @param password 发送者账号的密码
     * @param host 邮件服务器地址
     * @param port 邮件服务器端口
     * @param ssl 是否使用ssl
     * @param toUsername 接收者账号
     * @param subject 邮件主题
     * @param body 邮件内容
     * @param filePath 附件路径
     */
    public static void sendEmail(String username, String password, String host, String port, String ssl,String toUsername, String subject, String body,String filePath) {
        log.info("发送邮件中...");
        // 设置邮件服务器属性
        Properties properties = System.getProperties();
        properties.put("mail.smtp.host", host);
        properties.put("mail.smtp.port", port);
        properties.put("mail.smtp.auth", ssl);
        if("true".equals(ssl)) {
            properties.put("mail.smtp.socketFactory.port", port);
            properties.put("mail.smtp.socketFactory.class", "javax.net.ssl.SSLSocketFactory");
            properties.put("mail.smtp.socketFactory.fallback", "false");
        }
        Session session = Session.getInstance(properties, new Authenticator() {
            @Override
            protected PasswordAuthentication getPasswordAuthentication() {
                return new PasswordAuthentication(username, password);
            }
        });
        try {
            Message message = new MimeMessage(session);
            message.setFrom(new InternetAddress(username));
            message.setRecipients(Message.RecipientType.TO, InternetAddress.parse(toUsername));
            message.setSubject(subject);
            //有附件的情况下
            Multipart multipart = new MimeMultipart();
            BodyPart contentPart = new MimeBodyPart();
            //邮件内容
            contentPart.setContent(body, "text/html;charset=utf-8");
            multipart.addBodyPart(contentPart);
            //邮件附件部分
            if (org.apache.commons.lang3.StringUtils.isNotBlank(filePath)) {
                String[] filePathArr=filePath.split(",");
                for (String path: filePathArr) {
                    //判断文件是否存在，如不存在则不加入附件
                    if(new File(path).exists()){
                        //将文件设置为附件
                        BodyPart attachPart = new MimeBodyPart();
                        //附件地址
                        FileDataSource fileDataSource = new FileDataSource(path);
                        attachPart.setDataHandler(new DataHandler(fileDataSource));
                        attachPart.setFileName(MimeUtility.encodeText(fileDataSource.getName()));
                        multipart.addBodyPart(attachPart);
                    }
                }
            }
            message.setContent(multipart);
            //没有附件
            //message.setText(body);
            Transport.send(message);
            log.info("邮件发送成功！");
        } catch (MessagingException | UnsupportedEncodingException e) {
            log.error("邮件发送失败！", e);
        }
    }