之前已经看到，如果消息包指定了他们之间的关系，增加一个文件进去，邮箱就会显示成普通附件
但是那毕竟不是附件，附件就是附件不能含糊
其实增加附件很简单
指定消息包内元素为混合关系
增加附件并指定附件的名称
package com.mail;
import java.util.Date;
import java.util.Properties;
import javax.activation.DataHandler;
import javax.activation.FileDataSource;
import javax.mail.Message;
import javax.mail.Session;
import javax.mail.Transport;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeBodyPart;
import javax.mail.internet.MimeMessage;
import javax.mail.internet.MimeMultipart;
import javax.mail.internet.MimeUtility;
public class Html_File_InnerFile {
public static void main(String[] args) throws Exception {
Properties props = new Properties();
props.put( "mail.smtp.host ", "smtp.163.com ");
props.put("mail.smtp.auth", "true");
Session session = Session.getInstance(props);
Message message = new MimeMessage(session);
InternetAddress from = new InternetAddress("test20120711120200@163.com");
from.setPersonal(MimeUtility.encodeText("风中落叶<test20120711120200@163.com>"));
message.setFrom(from);
InternetAddress to = new InternetAddress("test20120711120200@163.com");
message.setRecipient(Message.RecipientType.TO, to);
message.setSubject(MimeUtility.encodeText("强哥邀请，谁敢不从！"));
message.setSentDate(new Date());
MimeMultipart msgMultipart = new MimeMultipart("mixed");// 指定为混合关系
message.setContent(msgMultipart);
// 邮件内容
MimeBodyPart htmlPart = new MimeBodyPart();
htmlPart.setContent(
"<body background='http://dl.iteye.com/upload/picture/pic/110267/e244bda9-9034-36e3-87fd-807629b84222.jpg'>"
+ "<div style='position: absolute; left: 390px; top: 150px;height: "
+ "100px;width: 200px;' align='center'>"
+ "<font color='red'>这是测试邮件，请勿回复</font>" + "</div></body>",
"text/html;charset=UTF-8");
// TODO 组装的顺序非常重要，一定要先组装文本域，再组装文件
msgMultipart.addBodyPart(htmlPart);
// 组装附件
MimeBodyPart file = new MimeBodyPart();
FileDataSource file_datasource = new FileDataSource("D:\\img201008031058340.zip");
DataHandler dh = new DataHandler(file_datasource);
file.setDataHandler(dh);
// 附件区别内嵌内容的一个特点是有文件名，为防止中文乱码要编码
file.setFileName(MimeUtility.encodeText(dh.getName()));
msgMultipart.addBodyPart(file);
message.saveChanges();
Transport transport = session.getTransport("smtp");
transport.connect("smtp.163.com", 25, "test20120711120200", "test123456");
transport.sendMessage(message, message.getAllRecipients());
transport.close();
System.out.println("发送完毕");
}
}
主要组装元素的时候一定要先组装邮件内容再组装附件
无论在 客户端工具还是邮箱，都是提示附件，邮件还是带背景图片的
附件名称是你自己指定的
