用java发邮件，必须要导入新的包
mail.jar – 发邮件的核心包
activation.jar – 对用户和密码加密.
在mail.jar中有三个核心类：
Javax.mail.Session – 是指与邮件服务器会话。整个项目中只要一个就可以了.
Javax.mail.Message（接口） - 准备发送数据信息。
MimeMessage － 可以设置类型的数据信息。
Transport – 它拥有一个方法可以发送Message。
@Test
public void sendMail() throws Exception{
//1,声明properties对象放信息
Properties props = new Properties();
//设置连接哪一台服务器
props.setProperty("mail.host", "smtp.163.com");
//设置是否认证：
props.setProperty("mail.smtp.auth", "true");
//2，声明用户名和密码
Authenticator auth = new Authenticator(){
//返回用户名和密码对象
@Override
protected PasswordAuthentication getPasswordAuthentication() {
PasswordAuthentication pa = new PasswordAuthentication("xxxxx@163.com", "123456");
return pa;
}
};
//3,获取session对象
Session session = Session.getDefaultInstance(props, auth);
//设置session为调试模式
session.setDebug(true);
//4,声明信息
MimeMessage mm1 = new MimeMessage(session);
//5,设置发件人信息
Address form = new InternetAddress("xxxxx@163.com");
mm1.setFrom(form);
//6,设置收件人 ,RecipientType:发送，抄送，密送 类型
mm1.setRecipient(RecipientType.TO, new InternetAddress("xxx@qq.com"));
//mm1.setRecipient(RecipientType.CC, new InternetAddress(""));//抄送
//7，设置主题
mm1.setSubject("拉面学习通知");
String cont = "请点击 <a href='http://www.fsy158.com/news/31_207'>官网新闻</a>查看祝您发财";
mm1.setContent(cont, "text/html;charset=UTF-8");
//8，发送
Transport.send(mm1);
}
其中的mimeType可是text/plain纯文本。
发送附件：
@Test
public void sendMailWithFile() throws Exception{
Properties ps = new Properties();
ps.setProperty("mail.host", "smtp.163.com");
ps.setProperty("mail.smtp.auth", "true");
Authenticator auth = new Authenticator(){
@Override
protected PasswordAuthentication getPasswordAuthentication() {
return new PasswordAuthentication("xxx@163.com","xxx.");
}
};
Session session = Session.getDefaultInstance(ps, auth);
session.setDebug(true);
MimeMessage msg = new MimeMessage(session);
Address address = new InternetAddress("xxx@163.com");
msg.setFrom(address);
//发送给
msg.setRecipient(RecipientType.TO, new InternetAddress("xxx@qq.com"));
msg.setRecipient(RecipientType.BCC, new InternetAddress("xxx@qq.com"));//密送
msg.setRecipient(RecipientType.CC, new InternetAddress("xxx@qq.com"));//抄送
msg.setSubject("$激情小视频*免费观看");
//声明多部件处理
MimeMultipart mm = new MimeMultipart();
MimeBodyPart body1 = new MimeBodyPart();
//设置附件
DataSource ds1 = new FileDataSource(new File("./img/a.jpg"));
DataHandler dh1 = new DataHandler(ds1);
body1.setDataHandler(dh1);
//必须设置名称
body1.setFileName(MimeUtility.encodeText("美女.jpg"));
MimeBodyPart body2 = new MimeBodyPart();
DataSource ds2 = new FileDataSource(new File("./img/b.jpg"));
DataHandler dh2 = new DataHandler(ds2);
body2.setDataHandler(dh2);
body2.setFileName(MimeUtility.encodeText("美女2.jpg"));
MimeBodyPart body3 = new MimeBodyPart();
DataSource ds3 = new FileDataSource(new File("./img/m.mp3"));
DataHandler dh3 = new DataHandler(ds3);
body3.setDataHandler(dh3);
body3.setFileName(MimeUtility.encodeText("小电影.mp3"));
//添加body到mm
mm.addBodyPart(body1);
mm.addBodyPart(body2);
mm.addBodyPart(body3);
msg.setContent(mm);
//设置发送日期
Calendar c = Calendar.getInstance();
c.add(Calendar.DATE, -5);
msg.setSentDate(c.getTime());
//发送
Transport.send(msg);
}
