JavaMail 发送邮件例证（包括附件，及信息，及html内容的图片处理）
public void SendMessage(String msghtm) {
String to = "name@21cn.com";
String from = "name@21cn.com";
String subject = "testhtml你好";
String mailhost = "smtp.21cn.com";
String content="<html><head> 你好 ！</head><body><a href='http://www.sina.com'>content</a><br>contentcontentcontentcontent</body></html>";
MimeMessage mimeMsg = null;
Session session = null;
String fileAttachment = "C:\\mm.jpg";
try {
Properties props = System.getProperties(); //获得系统属性
props.put("mail.smtp.host", mailhost); //设置SMTP主机
props.put("mail.transpont.protocol","smtp");
props.put("mail.smtp.auth","true");
session = Session.getInstance(props,new PassAuth("name","pass"));
mimeMsg = new MimeMessage( session );
mimeMsg.setFrom(new InternetAddress( from ) );
if(to!=null){
mimeMsg.setRecipients( Message.RecipientType.TO, InternetAddress.parse( to ) );
}
mimeMsg.setSubject(subject,"GB2312");
// 第一部分信息
MimeBodyPart mbp1 = new MimeBodyPart();
mbp1.setText( content, "GB2312");
// 第二部分信息
MimeBodyPart mbp2 = new MimeBodyPart();
FileDataSource fds = new FileDataSource( fileAttachment );
mbp2.setDataHandler(new DataHandler(fds));
mbp2.setFileName(fds.getName());
mbp2.setHeader("Content-ID","image1");
// 在第三部分信息中附加一个文件
StringBuffer msg=new StringBuffer();
String line="";
FileReader fr=new FileReader("c:\\test.htm");
BufferedReader br=new BufferedReader(fr);
while((line=br.readLine())!=null){
msg.append(line);
}
BodyPart mbp3=new MimeBodyPart();
mbp3.setContent(msg.toString(),"text/html;charset=gb2312");
// 创建 Multipart 并放入每个 MimeBodyPart
Multipart mp = new MimeMultipart("related");
mp.addBodyPart( mbp1 );
mp.addBodyPart( mbp2 );
mp.addBodyPart( mbp3);
mimeMsg.setContent(mp);
//mimeMsg.setContent(msghtm,"text/html;charset=gb2312");
mimeMsg.setDisposition("Inline");
mimeMsg.setSentDate(new Date());
Transport.send( mimeMsg );
System.out.println("email send！");
} catch (MessagingException e) {
e.printStackTrace();
} catch (Exception e) {
e.printStackTrace();
}
}