JavaMail

/** * 最简单的邮件 * @author ztx */public class Demo1 {/** * @param args */public static void main(String[] args) throws Exception{Properties props = new Properties();props.put("mail.smtp.auth","true");props.put("mail.transport.protocol","smtp");Session session = Session.getInstance(props);Message msg = new MimeMessage(session);msg.setText("你好吗？");msg.setFrom(new InternetAddress("[e-mail]"));Transport transport = session.getTransport();//transport.send(msg,new Address[]{new InternetAddress("[e-mail]")});transport.connect("smtp.sina.com",25,"itcast_test","123456");transport.sendMessage(msg,new Address[]{new InternetAddress("[e-mail]")});transport.close();}}

/** * 有认证的邮件 * @author ztx * */public class Demo2 {public static void main(String[] args) throws Exception {Properties props = new Properties();props.put("mail.smtp.auth","true");//设置以认证的方式与服务器对话props.put("mail.transport.protocol","smtp");//指定邮件协议props.put("mail.host","smtp.sina.com");//服务器地址Session session = Session.getInstance(props, new Authenticator(){ protected PasswordAuthentication getPasswordAuthentication(){ return new PasswordAuthentication("itcast_test","123456");//设置用户名密码 } });session.setDebug(true);//方式一:代码撰写邮件(用代码拼写邮件)/*Message msg = new MimeMessage(session);msg.setFrom(new InternetAddress("[e-mail]"));//发件人msg.setRecipients(RecipientType.TO,InternetAddress.parse("[e-mail],[e-mail]"));//收件人msg.setSubject("中文主题");msg.setContent("<span style="color:red;" mce_style="color:red;">中文呵呵</span>","text/html;charset=gbk");//内容Transport.send(msg); *///方式二:选择客户端撰写完的邮件 (无需用代码拼写出复杂的邮件)Message msg = new MimeMessage(session,new FileInputStream("E//demo3.eml")); Transport.send(msg,InternetAddress.parse("[e-mail]"));//用Transport静态方法发送邮件，内部同时完成了类似Demo1里的以下三部:/*transport.connect("smtp.sina.com",25,"itcast_test","123456");//连接transport.sendMessage(msg,new Address[]{new InternetAddress("[e-mail]")});//发送transport.close();//释放资源*/}}

/** * 复杂邮件 * @author ztx * */public class Demo3 {public static void main(String[] args) throws Exception {Session session = Session.getInstance(new Properties());//创建邮件Message msg = new MimeMessage(session);msg.setFrom(new InternetAddress("'"+MimeUtility.encodeText("传智博客")+"'<[e-mail]>"));//发件人地址msg.setReplyTo(new Address[]{new InternetAddress("[e-mail]")});//回复地址msg.setRecipients(RecipientType.TO, InternetAddress.parse("'"+MimeUtility.encodeText("黎活明")+"'<[e-mail]>"));//收件人//给邮件加主题msg.setSubject("你们的java培训真的是最牛的吗");//混合体MimeMultipart msgMultipart = new MimeMultipart("mixed");//给邮件加内容，内容是个混合体(主内容和附件混合)msg.setContent(msgMultipart);//混合体里的附件MimeBodyPart attch = new MimeBodyPart();//混合体里的主内容MimeBodyPart content = new MimeBodyPart();//混合体里放附件msgMultipart.addBodyPart(attch);//混合体里放主内容msgMultipart.addBodyPart(content);DataSource ds = new FileDataSource("D://...//附件.txt");//文件DataHandler dh = new DataHandler(ds);//包装一个文件attch.setDataHandler(dh);//附件里放入包装对象attch.setFileName(MimeUtility.encodeText("java培训.txt"));//设置附件名//关联体MimeMultipart bodyMultipart = new MimeMultipart("related");//主内容是个关联体(html和图片关联)content.setContent(bodyMultipart);//htmlMimeBodyPart htmlPart = new MimeBodyPart();//图片MimeBodyPart gifPart = new MimeBodyPart();//关联体里放htmlbodyMultipart.addBodyPart(htmlPart);//关联体里放图片bodyMultipart.addBodyPart(gifPart);//填充图片DataSource gifds = new FileDataSource("E://...//logo.gif");DataHandler gifdh = new DataHandler(gifds);gifPart.setDataHandler(gifdh);gifPart.setHeader("Content-Location","http://www.itcast.cn/logo.gif");htmlPart.setContent("你们的Java培训真的是最牛的吗?想跟你们比一下!<img src="http://www.itcast.cn/logo.gif" mce_src="http://www.itcast.cn/logo.gif"/>","text/html;charset=gbk");msg.saveChanges();OutputStream ops = new FileOutputStream("");msg.writeTo(ops);ops.close();}}

 

Web系统发送邮件的方式：让服务器创建Session，应用程序用JNDI获得Session，执行发送。

<Context> <Resource name="mail/Dog" auth="Container" type="javax.mail.Session" mail.smtp.host="smtp.sina.com" mail.smtp.auth="true" mail.transport.protocol="smtp" /></Context>

public class SendMailServlet extends HttpServlet {public void doGet(HttpServletRequest request, HttpServletResponse response)throws ServletException, IOException {doPost(request, response);}public void doPost(HttpServletRequest request, HttpServletResponse response)throws ServletException, IOException {try {//Demo2.main(new String[]{});Context initCtx = new InitialContext();Context envCtx = (Context) initCtx.lookup("java:comp/env");Session session = (Session) envCtx.lookup("mail/Dog");Message message = new MimeMessage(session);message.setFrom(new InternetAddress("[e-mail]"));InternetAddress to[] = new InternetAddress[1];to[0] = new InternetAddress("[e-mail]");message.setRecipients(Message.RecipientType.TO, to);message.setSubject("ha");message.setText("test");//Transport.send(message);Transport transport = session.getTransport();transport.connect("smtp.sina.com", "itcast_test", "123456");transport.sendMessage(message, to);transport.close();response.getWriter().print("ok!");} catch (Exception e) {e.printStackTrace(response.getWriter());}}}