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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