JavaMail(3)——发送带附件的邮件

关键技术：

发送带附件的邮件时必须使用MimeMultipart和MimeBodyPart。MimeBodyPart可以存储HTML子内容，也可以存储二进制数据，如文件内容。

MimeBodyPart的setDataHandler方法能够把DataHandler对象保存到邮件消息中，而用文件的File对象可以构造文件数据源FileDataSource，由FileDataSource可以构造DataHandler对象，所以，可以把文件内容设置到邮件消息中，此时文件便成了邮件的附件。

MimeBodyPart的setFileName方法给附件设置文件。

import?java.io.File;
import?java.util.Date;

import?javax.activation.DataHandler;
import?javax.activation.FileDataSource;
import?javax.mail.Address;
import?javax.mail.BodyPart;
import?javax.mail.Message;
import?javax.mail.Multipart;
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;

/**
?*?发送带附件的邮件
?*/
public?class?AttachmentMailSender?{

????public?static?boolean?sendMail(MailSenderInfo?mailInfo)?{
????????//?判断是否需要身份认证
????????MyAuthenticator?authenticator?=?null;
????????if?(mailInfo.isValidate())?{
????????????//?如果需要身份认证，则创建一个密码验证器
????????????authenticator?=?new?MyAuthenticator(mailInfo.getUserName(),
????????????????????mailInfo.getPassword());
????????}
????????//?根据邮件发送的属性和密码验证器构造一个发送邮件的session
????????Session?sendMailSession?=?Session.getInstance(mailInfo
????????????????.getProperties(),?authenticator);
????????try?{
????????????//?根据session创建一个邮件消息
????????????Message?mailMessage?=?new?MimeMessage(sendMailSession);
????????????//?创建邮件发送者地址
????????????Address?from?=?new?InternetAddress(mailInfo.getFromAddress());
????????????//?设置邮件消息的发送者
????????????mailMessage.setFrom(from);
????????????//?创建邮件的接收者地址，并设置到邮件消息中
????????????Address?to?=?new?InternetAddress(mailInfo.getToAddress());
????????????mailMessage.setRecipient(Message.RecipientType.TO,to);
????????????//?设置邮件消息的主题
????????????mailMessage.setSubject(mailInfo.getSubject());
????????????//?设置邮件消息发送的时间
????????????mailMessage.setSentDate(new?Date());
????????????
????????????//?MiniMultipart类是一个容器类，包含MimeBodyPart类型的对象
????????????Multipart?mainPart?=?new?MimeMultipart();
????????????//?创建一个包含HTML内容的MimeBodyPart
????????????BodyPart?html?=?new?MimeBodyPart();
????????????//?设置HTML内容
????????????html.setContent(mailInfo.getContent(),?"text/html;?charset=GBK");
????????????mainPart.addBodyPart(html);
????????????//?为邮件添加附件
????????????String[]?attachFileNames?=?mailInfo.getAttachFileNames();
????????????if?(attachFileNames?!=?null?&&?attachFileNames.length?>?0)?{
????????????????//?存放邮件附件的MimeBodyPart
????????????????MimeBodyPart?attachment?=?null;
????????????????File?file?=?null;
????????????????for?(int?i?=?0;?i?<?attachFileNames.length;?i++)?{
????????????????????attachment?=?new?MimeBodyPart();
????????????????????//?根据附件文件创建文件数据源
????????????????????file?=?new?File(attachFileNames[i]);
????????????????????FileDataSource?fds?=?new?FileDataSource(file);
????????????????????attachment.setDataHandler(new?DataHandler(fds));
????????????????????//?为附件设置文件名
????????????????????attachment.setFileName(MimeUtility.encodeWord(file.getName(),?"GBK",
????????????????????????????null));
????????????????????mainPart.addBodyPart(attachment);
????????????????}
????????????}
????????????//?将MiniMultipart对象设置为邮件内容
????????????mailMessage.setContent(mainPart);
????????????//?发送邮件
????????????Transport.send(mailMessage);
????????????return?true;
????????????
????????}?catch?(Exception?e)?{
????????????e.printStackTrace();
????????????return?false;
????????}
????}
????
????public?static?void?main(String[]?args)?{
????????//?创建邮件信息
????????MailSenderInfo?mailInfo?=?new?MailSenderInfo();
????????mailInfo.setMailServerHost("smtp.sina.com.cn");
????????mailInfo.setMailServerPort("25");
????????mailInfo.setValidate(true);
????????mailInfo.setUserName("***");
????????mailInfo.setPassword("***");
????????mailInfo.setFromAddress("***@sina.com");
????????mailInfo.setToAddress("***@163.com");
????????mailInfo.setSubject("MyMail测试");
????????mailInfo.setContent("我的邮件测试/n/rMy?test?mail/n/r");

????????String[]?fileNames?=?new?String[3];
????????fileNames[0]?=?"C:/temp/new.txt";
????????fileNames[1]?=?"C:/temp/test.wav";
????????fileNames[2]?=?"C:/temp/mary_photo.jpg";
????????mailInfo.setAttachFileNames(fileNames);
????????
????????AttachmentMailSender.sendMail(mailInfo);
????}
}