使用Java'；发送电子邮件时，我无法在gmail中获得查看操作；s邮件api
示例代码段使用Java'；发送电子邮件时，我无法在gmail中获得查看操作；s邮件api,java,email,google-schemas,Java,Email,Google Schemas,示例代码段 MimeBodyPart htmlpart = new MimeBodyPart(); htmlpart.setContent("<h1>Sample</h1><p>This is a sample HTML part","text/html"); MimeBodyPart scriptcontent = new MimeBodyPart(); // scriptcont
MimeBodyPart htmlpart = new MimeBodyPart();
htmlpart.setContent("<h1>Sample</h1><p>This is a sample HTML part","text/html");
MimeBodyPart scriptcontent = new MimeBodyPart();
// scriptcontent.setHeader("Content-Type", "application/ld+json");
scriptcontent.setContent(" <script type=\"application/ld+json\">{ \"@context\":\"http://schema.org\",\"@type\":\"EmailMessage\",\"description\":\"Check this out\",\"action\": { \"@type\": \"ViewAction\",\"url\":\"https://www.youtube.com/\" } } </script>","application/ld+json");
Multipart mp = new MimeMultipart();
mp.addBodyPart(htmlpart);
mp.addBodyPart(scriptcontent);
mail.setContent(mp);
MimeBodyPart htmlpart=new MimeBodyPart（）；
setContent（“示例这是一个示例HTML部分”，“text/HTML”）；
MimeBodyPart scriptcontent=新的MimeBodyPart（）；
//setHeader（“内容类型”、“应用程序/ld+json”）；
scriptcontent.setContent（“{\'@context\”：\”http://schema.org\“，\“@type\”：“EmailMessage\”，“description\”：“checkthis\”，“action\”：{\“@type\”：“ViewAction\”，“url\”：\”https://www.youtube.com/\“}}”、“应用程序/ld+json”）；
Multipart mp=新的MimeMultipart（）；
mp.addBodyPart（htmlpart）；
mp.addBodyPart（脚本内容）；
mail.setContent（mp）；
我已经将脚本类型设置为json+ld，但我仍然收到一封没有查看操作的普通电子邮件。这样做有效吗
MimeBodyPart htmlpart = new MimeBodyPart();
String html = "<html><h1>Sample</h1><p>This is a sample HTML part";
html += " <script type=\"application/ld+json\">{ \"@context\":\"http://schema.org\",\"@type\":\"EmailMessage\",\"description\":\"Check this out\",\"action\": { \"@type\": \"ViewAction\",\"url\":\"https://www.youtube.com/\" } } </script>";
html += "</html>";
htmlpart.setContent(html, "text/html");
Multipart mp = new MimeMultipart();
mp.addBodyPart(htmlpart);
mail.setContent(mp);
MimeBodyPart htmlpart=new MimeBodyPart（）；
String html=“Sample这是一个示例html部分”；
html+=“{\'@context\”：\”http://schema.org\“，\“@type\”：“EmailMessage\”，“description\”：“checkthis\”，“action\”：{\“@type\”：“ViewAction\”，“url\”：\”https://www.youtube.com/\" } } ";
html+=“”；
setContent（html，“text/html”）；
Multipart mp=新的MimeMultipart（）；
mp.addBodyPart（htmlpart）；
mail.setContent（mp）；