使用JavaMail实现发送模板邮件以及保存到发件箱

需要用到的jar包
1.freemarker-2.3.19.jar
2.javax.mail.jar
3.javax.activation.jar

本次测试邮箱是腾讯企业邮箱，其他未经测试。
做这个功能是因为我女朋友每个月都需要手动去发几十个人的考勤、考核邮件，实在是太过重复的做一件很乏味的事情，所以才有了这个程序，不过，界面是使用的控制台，简单一点。

核心代码展示

/**
	 * 发送邮件
	 * @author hezhao
	 * @Time   2017年3月13日 上午11:25:15
	 */
	public void send() {
		System.out.println("正在发送邮件至:::["+to+"]  ...");
		
		// 设置邮件服务器
		Properties prop = System.getProperties();
		prop.put("mail.smtp.host", stmpmailServer);
		prop.put("mail.smtp.auth", "true");
		prop.put("mail.transport.protocol", this.send);
		prop.put("mail.smtp.socketFactory.class",
				"javax.net.ssl.SSLSocketFactory");
		prop.put("mail.smtp.socketFactory.port", this.smtpport);
		prop.put("mail.smtp.socketFactory.fallback", "false");

		// 使用SSL，企业邮箱必需！
		// 开启安全协议
		MailSSLSocketFactory sf = null;
		try {
			sf = new MailSSLSocketFactory();
			sf.setTrustAllHosts(true);
		} catch (GeneralSecurityException e1) {
			e1.printStackTrace();
		}
		prop.put("mail.smtp.starttls.enable", "true");
		prop.put("mail.smtp.ssl.socketFactory", sf);

		// 获取Session对象
		Session session = Session.getDefaultInstance(prop, new Authenticator() {
			// 此访求返回用户和密码的对象
			@Override
			protected PasswordAuthentication getPasswordAuthentication() {
				PasswordAuthentication pa = new PasswordAuthentication(username,
						password);
				return pa;
			}
		});
		// 设置session的调试模式，发布时取消
		session.setDebug(true);

		try {
			// 封装Message对象
			Message message = new MimeMessage(session);
			// message.setFrom(new InternetAddress(from,from)); //设置发件人

			// 设置自定义发件人昵称
			String nick_from = "";
			try {
				nick_from = javax.mail.internet.MimeUtility.encodeText(this.nickname_from);
			} catch (UnsupportedEncodingException e) {
				e.printStackTrace();
			}
			message.setFrom(new InternetAddress(nick_from + " <" + from + ">"));

			// 设置自定义收件人昵称
			String nick_to = "";
			try {
				nick_to = javax.mail.internet.MimeUtility.encodeText(this.nickname_to);
			} catch (UnsupportedEncodingException e) {
				e.printStackTrace();
			}
			message.setRecipient(Message.RecipientType.TO, new InternetAddress(nick_to + " <" + to + ">"));// 设置收件人
			message.setSubject(mailSubject);// 设置主题
			message.setContent(mailContent, "text/html;charset=utf8");// 设置内容(设置字符集处理乱码问题)
			message.setSentDate(new Date());// 设置日期

			// 发送
			Transport.send(message);
			System.out.println("发送成功...");

			//保存邮件到发件箱
			saveEmailToSentMailFolder(message);
			
			if(mailSubject.contains("考勤")){
				FileLog.writeLog(this.nickname_to + " <" + to + ">发送成功");
			}else{
				FileLog.writeLog(this.nickname_to + " <" + to + ">发送成功");
			}
		} catch (Exception e) {
			e.printStackTrace();
			System.out.println("发送邮件异常...");
			
			if(mailSubject.contains("考勤")){
				FileLog.writeLog(this.nickname_to + " <" + to + ">发送失败");
			}else{
				FileLog.writeLog(this.nickname_to + " <" + to + ">发送失败");
			}
		}
	}

保存至发件箱

/**
	 * 获取用户的发件箱文件夹
	 * 
	 * @param message
	 *            信息
	 * @param store
	 *            存储
	 * @return
	 * @throws IOException
	 * @throws MessagingException
	 */
	private Folder getSentMailFolder(Message message, Store store)
			throws IOException, MessagingException {
		// 准备连接服务器的会话信息
		Properties props = new Properties();
		props.setProperty("mail.store.protocol", get);
		props.setProperty("mail.imap.host", imapmailServer);
		props.setProperty("mail.imap.port", "143");

		/** QQ邮箱需要建立ssl连接 */
		props.setProperty("mail.imap.socketFactory.class",
				"javax.net.ssl.SSLSocketFactory");
		props.setProperty("mail.imap.socketFactory.fallback", "false");
		props.setProperty("mail.imap.starttls.enable", "true");
		props.setProperty("mail.imap.socketFactory.port", imapport);

		// 创建Session实例对象
		Session session = Session.getInstance(props);
		URLName urln = new URLName(get, imapmailServer, 143, null,
				username, password);
		// 创建IMAP协议的Store对象
		store = session.getStore(urln);
		store.connect();

		// 获得发件箱
		Folder folder = store.getFolder("Sent Messages");
		// 以读写模式打开发件箱
		folder.open(Folder.READ_WRITE);

		return folder;
	}

	/**
	 * 保存邮件到发件箱
	 * 
	 * @param message
	 *            邮件信息
	 */
	private void saveEmailToSentMailFolder(Message message) {

		Store store = null;
		Folder sentFolder = null;
		try {
			sentFolder = getSentMailFolder(message, store);
			message.setFlag(Flag.SEEN, true); // 设置已读标志
			sentFolder.appendMessages(new Message[] { message });
			
			System.out.println("已保存到发件箱...");
		} catch (Exception e) {
			e.printStackTrace();
		} finally {

			// 判断发件文件夹是否打开如果打开则将其关闭
			if (sentFolder != null && sentFolder.isOpen()) {
				try {
					sentFolder.close(true);
				} catch (MessagingException e) {
					e.printStackTrace();
				}
			}
			// 判断邮箱存储是否打开如果打开则将其关闭
			if (store != null && store.isConnected()) {
				try {
					store.close();
				} catch (MessagingException e) {
					e.printStackTrace();
				}
			}
		}
	}

获取模板内容

   /**
	 * 得到模板内容
	 * @author hezhao
	 * @Time   2017年3月13日 下午1:01:08
	 * @param fileName
	 * @param map
	 * @return
	 */
	public String getMailText(String fileName,Map<String,Object> map){
		String htmlText = null;
		try {
			Template template = config.getTemplate(fileName);
			htmlText = FreeMarkerTemplateUtils.processTemplateIntoString(template, map);
		} catch (IOException e) {
			e.printStackTrace();
		} catch (TemplateException e) {
			e.printStackTrace();
		}
		return htmlText;
	}

替换模板内容

FreemarkerUtil freemarkerUtil = null;
try {
     freemarkerUtil = (FreemarkerUtil) context.getBean("freemarkerUtil");
} catch (Exception e) {
    System.out.println("出现异常！！！");
    e.printStackTrace();
}			
String mailContent = freemarkerUtil.getMailText(fileName, map);

HTML模板（这个还是景洲帮我实现的）

<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8" />
	</head>
	<style>
		table{border-collapse:collapse; text-align: center;font-size:12px;}
		.yellow{background: #FFFF00;}
		.blod{font-weight: bold;}
	</style>
	<body>
	<table width="1160"  border="1">
	  <tr>
	    <td colspan="11" align="center" style="font-size: 22px;">${title}</td>
      </tr>
	  <tr>
	    <td rowspan="2" class="yellow">序号</td>
	    <td rowspan="2" class="yellow">部门</td>
	    <td rowspan="2" class="yellow">姓名</td>
	    <td rowspan="2" class="yellow">入职时间</td>
	    <td colspan="5" class="blod" style="font-size: 14px;">考勤结果汇总</td>
	    <td> </td>
	    <td rowspan="2" >备注</td>
      </tr>
	  <tr>
	    <td>正常出勤</td>
	    <td>请假小时</td>
	    <td>迟到分钟</td>
	    <td>迟到扣款</td>
	    <td>旷工天数</td>
	    <td>休年假天数</td>
      </tr>
	  <tr>
	    <td>${no}</td>
	    <td>${dept}</td>
	    <td>${name}</td>
	    <td>${intotime}</td>
	    <td class="yellow blod">${workday}</td>
	    <td class="blod">${outhour}</td>
	    <td class="blod">${deletemin}</td>
	    <td class="blod">${deletemoney}</td>
	    <td class="blod">${kg}</td>
	    <td class="blod">${year}</td>
	    <td>${remark}</td>
      </tr>
    </table>
    
    <div>
    	<br />
    </div>
    
    <hr style=" 210px; height: 1px;" color="#b5c4df" size="1" align="left">
    
    <div style="font-size: 14px;font-family: 'lucida Grande', Verdana;">
    	<span>${bottom}</span>
    </div>
		
	</body>
</html>