參考：https://blog.csdn.net/liguo9860/article/details/6874040

我這裡就說一下使用Spring的JavaMailSender如何實現

1. 配置JavaMailSender

    @Bean
    public JavaMailSender javaMailSender(){
        JavaMailSenderImpl javaMailSender = new JavaMailSenderImpl();
        javaMailSender.setDefaultEncoding("UTF-8");
        javaMailSender.setUsername(env.getProperty("email.user"));
        javaMailSender.setPassword(env.getProperty("email.pwd"));
        javaMailSender.setHost(env.getProperty("email.host"));
        Security.addProvider(new com.sun.net.ssl.internal.ssl.Provider());
        final String SSL_FACTORY = "javax.net.ssl.SSLSocketFactory";
        // Get a Properties object
        Properties props = System.getProperties();
        props.setProperty("mail.smtp.socketFactory.class", SSL_FACTORY);
        props.setProperty("mail.smtp.socketFactory.fallback", "false");
        props.setProperty("mail.smtp.port", "465");
        props.setProperty("mail.smtp.socketFactory.port", "465");
        props.put("mail.smtp.auth", "true");
        javaMailSender.setJavaMailProperties(props);
        return javaMailSender;
    }

2. 傳送郵件

String[] receivers = new String[]{"收件人[email protected]", "收件人[email protected]"};
String subject = "測試SSL傳送郵件，走465埠";
String content = "<h2>哈哈測試， 原文地址：https://home.cnblogs.com/u/tomcatandjerry/</h2>"
MimeMessagePreparator preparator = new MimeMessagePreparator() {
    public void prepare(MimeMessage mimeMessage) throws Exception {
        MimeMessageHelper message = new MimeMessageHelper(mimeMessage);
        message.setTo(receivers);
        if(data.getBcc() != null){
            message.setBcc(data.getBcc());
        }
        message.setFrom("
 
[email protected]");
        message.setSubject(subject);
        message.setText(content, true);
    }
};
mailSender.send(preparator);