springboot- asynchronous, send mail (b)

@Test    // send message complexity 
    void contextLoads2 () throws MessagingException {
        MimeMessage mimeMessage = mailSender.createMimeMessage();
        //组装
        MimeMessageHelper helper = new MimeMessageHelper(mimeMessage,true);
        //正文
        helper.setSubject("xxx你好啊");
        helper.setText ( "<style = h1 of 'Color: Red'> row down the road Java </ h1 of>", to true );
         // Annex 
        helper.addAttachment ( "baby Kay .jpg", new new File ( "C : the Users \\ Desktop \\ \\ \\ PC favicon.ico " ));
        helper.addAttachment("莱纳德.jpg",new File("C:\\Users\\pc\\Desktop\\favicon.ico"));

        helper.setTo("[email protected]");
        helper.setFrom("[email protected]");
        mailSender.send(mimeMessage);
    }