如何利用模板发送邮件
目前web应用很多时候都需要像用户发送邮件,尤其是在我们注册的时候,其实这些邮件很多时候内容都是类似的,仅仅是一些有户名等不同,那么我们是否可以利用一个模板呢,模板里面有一些占位符,当我们要发送邮件的时候,仅仅把这些占位符做一替换就行了呢?答案肯定是可以的,请看下面的例子程序:
1. 邮件模板mailTemplate.xml
<?xml version="1.0" encoding="UTF-8"?> <email> <ProjectMail> <subject id="ProjectSubject"> <![CDATA[Hello%toUsername%]]></subject> <content id="ProjectMailBody"> <![CDATA[<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> <HTML> <HEAD> <META http-equiv=Content-Type content="text/html; charset=UTF-8"> <META content="MSHTML 6.00.6000.17063" name=GENERATOR> <STYLE> TABLE { MARGIN-LEFT: 20px; } TD { border: 1px solid #CBCBCB; } .dataString { text-align:left; padding-left:3px; } .tableTittle{ background-color: #FF9900; } </STYLE> </HEAD> <BODY bgColor=#ffffff> <DIV><FONT face=Arial size=2></FONT> </DIV> <DIV><FONT face=Arial size=2>Hi %name%, </FONT></DIV> <br> <DIV><FONT face=Arial size=2>欢迎注册</FONT></DIV> <br> <DIV><FONT face=Arial size=2>该邮件是系统自动发出,请不要直接回复,谢谢</FONT></DIV> <br> <table width="800" border="1" cellspacing="0" cellpadding="0"> <tr class="tableTittle"> <th width="25%"><font size="2" face="Arial" class="dataString" ><p align="center">Name</p></font></th> <th width="25%"><font size="2" face="Arial" class="dataString" ><p align="center">Date and time</p></font></th> </tr> <#listItems></#listItems> </table> <br> <DIV><FONT face=Arial size=2></FONT> </DIV> <DIV><FONT face=Arial size=2>Kind regards,</FONT></DIV> <DIV><FONT face=Arial size=2>Bridge</FONT></DIV> ]]> </content> </ProjectMail> </email>
2. Java代码:
@Service("mailService") public class MailServiceImpl implements MailService { private static final Logger LOG = LoggerFactory.getLogger(MailServiceImpl.class); private static final String DO_INVOICE_ITMES = "<#listItems></#listItems>"; private static final String NAME = "%name%"; @Override public void sendMail() { List<String> mailCCList = new ArrayList<String>(); String attachmentPath = null; Map<String, String> mail = buildMail(receiverName); String emailContent = mail.get("mailContent"); String subject = mail.get("emailSubject"); toSendMail(receiverMailAddress, mailCCList, emailContent, subject, attachmentPath, attachmentName); } private void toSendMail(String toAddress, List<String> mailCCList, String emailContent, String subject, String attachmentPath, String attachmentName) { Properties props = new Properties(); // Set the attribute of mail server props.put("mail.smtp.host",MAIL_SERVER_HOST)); // Need to be authorized, such ability through validation (must have this one) props.put("mail.smtp.auth", "true"); // Build a session with props objects Session session = Session.getDefaultInstance(props); // Using the session as parameters define the message object MimeMessage message = new MimeMessage(session); Transport transport = null; try { // Load the sender's address message.setFrom(new InternetAddress(MAIL_ADDRESS); // Load the recipient address message.addRecipient(Message.RecipientType.TO, new InternetAddress(toAddress)); if (StringUtil.isNotEmpty(mailCCList)) { InternetAddress[] to_mail = new InternetAddress[mailCCList.size()]; for (int i = 0; i < mailCCList.size(); i++) { to_mail[i] = new InternetAddress(mailCCList.get(i)); } message.addRecipients(Message.RecipientType.CC, to_mail); } // Load the subject message.setSubject(subject); // Add mail each part to the multipart, including the text content // and accessories MimeMultipart multipart = new MimeMultipart(); // Set the HTML content of the message BodyPart contentPart = new MimeBodyPart(); // To set the content and format/encoding of BodyPart contentPart.setContent(emailContent, "text/html;charset=UTF-8"); multipart.setSubType("related"); multipart.addBodyPart(contentPart); // Add attachment if (!StringUtil.isNullOrEmpty(attachmentName)) { contentPart = new MimeBodyPart(); DataSource source = new FileDataSource(attachmentPath); // Add attachment's content contentPart.setDataHandler(new DataHandler(source)); // Add attachment's title contentPart.setFileName(attachmentName); multipart.addBodyPart(contentPart); } // Add multipart object to the message message.setContent(multipart); // Save the mail message.saveChanges(); transport = session.getTransport("smtp"); // Connect the mail server transport.connect(MAIL_SERVER_HOST,MAIL_SERVER_USERNAME,MAIL_SERVER_PASSWORD); // Send mail transport.sendMessage(message, message.getAllRecipients()); LOG.info("Send mail to: " + toAddress + ",success"); } catch (AddressException e) { LOG.error(e); } catch (NoSuchProviderException e) { LOG.error(e); } catch (MessagingException e) { LOG.error( e); } finally { try { if (null != transport) { transport.close(); } } catch (MessagingException e) { LOG.error(e); } } } private Map<String, String> buildMail(String receiverName) { StringBuilder itemsBuilder = new StringBuilder(); Element emailTemplateRoot = getXMLRootElement("mailTemplate.xml"); String emailSubject = emailTemplateRoot.selectSingleNode("//*[@id='ProjectSubject']").getText().replace(TOUSERNAME, receiverName.toUpperCase()); StringBuilder content = new StringBuilder(); String mailTemplateContent = emailTemplateRoot.selectSingleNode("//*[@id='ProjectMailBody']").getText(); mailTemplateContent = mailTemplateContent.replace(NAME, receiverName).replace(DO_INVOICE_ITMES, itemsBuilder.toString()); content.append(mailTemplateContent); Map<String, String> mail = new HashMap<String, String>(); mail.put("emailSubject", emailSubject); mail.put("mailContent", content.toString()); return mail; } private String getColumnDataString(String data) { String columnData = null; columnData = "<td class='dataString'><font size='2' face='Arial'><p align='center'>" + data + "</p></font></td>" + "n"; return columnData; } private Element getXMLRootElement(String emailFile) { SAXReader reader = new SAXReader(); InputStream inputStream = this.getClass().getClassLoader().getResourceAsStream(emailFile); Document document = null; try { document = reader.read(inputStream); } catch (DocumentException e) { LOG.error("Get XML Root Element fail, DocumentException", e); } return document.getRootElement(); } }
2015.05.25补记:
写这篇文章时,由于是刚写博客,所以写的各种乱,大家可以参考这篇文章:http://blog.sina.com.cn/s/blog_86e49b8f01018zet.html,其实老夫当年写这篇文章时,也是参考了这篇文章,当时没有加上参考链接,是在惭愧
作 者: BridgeLi,https://www.bridgeli.cn
原文链接:https://www.bridgeli.cn/archives/22
版权声明:非特殊声明均为本站原创作品,转载时请注明作者和原文链接。
原文链接:https://www.bridgeli.cn/archives/22
版权声明:非特殊声明均为本站原创作品,转载时请注明作者和原文链接。
分类: Java
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