Java邮件客户端发送邮件＋附件

目前研究一下使用Java发送带有附件的邮件，从网上搜索了一下发现都存在各种各样的问题。在这里总结一下，展示一下基础代码，防止遗忘。

代码

public static boolean sendMail(String subject, String toMail,
            String content, String... files) {
        boolean isFlag = false;
        try {

            String smtpFromMail = "你的QQ号码@qq.com"; // 账号
            String pwd = "QQ上面申请的授权码"; // 密码
            int port = 465; // 端口
            String host = "smtp.qq.com"; // 端口

            Properties props = new Properties();
            props.put("mail.smtp.host", host);
            props.setProperty("mail.smtp.socketFactory.class",
                    "javax.net.ssl.SSLSocketFactory");
            props.put("mail.smtp.auth", "true");
            Session session = Session.getDefaultInstance(props);
            session.setDebug(false);

            MimeMessage message = new MimeMessage(session);
            try {
                message.setFrom(new InternetAddress(smtpFromMail, "QQ邮件测试"));
                message.addRecipient(Message.RecipientType.TO,
                        new InternetAddress(toMail));
                message.setSubject(subject);
                message.addHeader("charset", "UTF-8");

                /* 添加正文内容 */
                Multipart multipart = new MimeMultipart();
                BodyPart contentPart = new MimeBodyPart();
                contentPart.setText(content);

                contentPart.setHeader("Content-Type",
                        "text/html; charset=UTF-8");
                multipart.addBodyPart(contentPart);

                /* 添加附件 */
                for (String file : files) {
                    File usFile = new File(file);
                    MimeBodyPart fileBody = new MimeBodyPart();
                    DataSource source = new FileDataSource(file);
                    fileBody.setDataHandler(new DataHandler(source));
                    sun.misc.BASE64Encoder enc = new sun.misc.BASE64Encoder();
                    fileBody.setFileName("=?GBK?B?"
                            + enc.encode(usFile.getName().getBytes()) + "?=");
                    multipart.addBodyPart(fileBody);
                }

                message.setContent(multipart);
                message.setSentDate(new Date());
                message.saveChanges();
                Transport transport = session.getTransport("smtp");

                transport.connect(host, port, smtpFromMail, pwd);
                transport.sendMessage(message, message.getAllRecipients());
                transport.close();
                isFlag = true;
            } catch (Exception e) {
                isFlag = false;
                e.printStackTrace();
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
        return isFlag;
    }

    public static void main(String[] args) {
        boolean res = Main.sendMail("这是一封测试邮件", "想要发送的邮件地址",
                "朋友好久不见", "附件路径");
        System.out.println("Resuylt: " + res);
    }

注

1、使用Java客户端配置QQ邮箱发送邮件，需要现在QQ邮箱网页上申请授权码，发送邮件时放在密码的位置；
2、特别需要注意发送邮件的标题、正文内容的编码格式问题，不然容易造成乱码现象。