如何利用模板发送邮件

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如何利用模板发送邮件

2014年8月28日 Bridge Li 发表评论阅读评论

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

2018.09.10补记：

有感于上面的代码写的实在是太烂，稍微优化了一下，供需要的小伙伴参考：

package cn.bridgeli.demo;
 
import org.apache.commons.lang3.StringUtils;
 
import javax.activation.DataHandler;
import javax.activation.DataSource;
import javax.activation.FileDataSource;
import javax.mail.BodyPart;
import javax.mail.Message;
import javax.mail.MessagingException;
import javax.mail.Multipart;
import javax.mail.NoSuchProviderException;
import javax.mail.Session;
import javax.mail.Transport;
import javax.mail.internet.AddressException;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeBodyPart;
import javax.mail.internet.MimeMessage;
import javax.mail.internet.MimeMultipart;
import java.util.Date;
import java.util.List;
import java.util.Properties;
 
public class SendMailUtil {
 
    private SendMailUtil() {
    }
 
    /**
     * smtp 服务器地址
     */
    private static String host = "";
 
    /**
     * 端口
     */
    private static String port = "465";
    /**
     * 用户名
     */
    private static String user = "";
 
    /**
     * 密码
     */
    private static String pwd = "";
 
    /**
     * 发件人邮件地址
     */
    private static String from = "";
 
    /**
     * 发送邮件
     *
     * @param receiveUsers 收件人邮箱地址
     * @param subject      邮件主题
     * @param text         邮件内容
     * @param affix        邮件附件地址
     * @param affixName    邮件附件名
     */
    public static void send(List<String> receiveUsers, String subject, String text, String affix, String affixName) {
 
        Properties props = new Properties();
 
        // 设置发送邮件的邮件服务器的属性
        props.put("mail.smtp.host", host);
        props.put("mail.transport.protocol", "smtp");
        // 需要经过授权，也就是有户名和密码的校验，这样才能通过验证（一定要有这一条）
        props.put("mail.smtp.auth", "true");
        //使用ssl采用465端口发送邮件
        props.put("mail.smtp.socketFactory.class", "javax.net.ssl.SSLSocketFactory");
        props.put("mail.smtp.socketFactory.fallback", "false");
        props.put("mail.smtp.port", port);
        props.put("mail.smtp.socketFactory.port", port);
 
        //用刚刚设置好的props对象构建一个session
        Session session = Session.getDefaultInstance(props);
 
        // 有了这句便可以在发送邮件的过程中在console处显示过程信息，供调试使用（你可以在控制台（console)上看到发送邮件的过程）
        session.setDebug(true);
 
        // 用session为参数定义消息对象
        MimeMessage message = new MimeMessage(session);
        Transport transport = null;
        try {
            message.setFrom(new InternetAddress(from));
            // 加载收件人地址
            int size = receiveUsers.size();
            InternetAddress[] address = new InternetAddress[size];
 
            for (int i = 0; i < size; i++) {
                address[i] = new InternetAddress(receiveUsers.get(i));
            }
            // to 为收件人， cc 为抄送， bcc 为密送
            message.addRecipients(Message.RecipientType.TO, address);
            message.setSubject(subject);
 
            // 向multipart对象中添加邮件的各个部分内容，包括文本内容和附件
            Multipart multipart = new MimeMultipart();
 
            // 设置邮件的文本内容
            BodyPart contentPart = new MimeBodyPart();
            contentPart.setText(text);
            multipart.addBodyPart(contentPart);
 
            // 添加附件
            if (StringUtils.isNotBlank(affix) && StringUtils.isNotBlank(affixName)) {
 
                BodyPart messageBodyPart = new MimeBodyPart();
                DataSource source = new FileDataSource(affix);
                // 添加附件的内容
                messageBodyPart.setDataHandler(new DataHandler(source));
                // 添加附件的标题，这里很重要，通过下面的 Base64 编码的转换可以保证你的中文附件标题名在发送时不会变成乱码
                sun.misc.BASE64Encoder enc = new sun.misc.BASE64Encoder();
                messageBodyPart.setFileName("=?GBK?B?" + enc.encode(affixName.getBytes()) + "?=");
                multipart.addBodyPart(messageBodyPart);
            }
 
            // 将multipart对象放到message中
            message.setContent(multipart);
            // 设置发送的日期
            message.setSentDate(new Date());
            // 保存邮件
            message.saveChanges();
 
            // 发送邮件
            transport = session.getTransport("smtp");
            // 连接服务器的邮箱
            transport.connect(host, user, pwd);
            // 把邮件发送出去
            transport.sendMessage(message, message.getAllRecipients());
 
        } catch (NoSuchProviderException e) {
            e.printStackTrace();
        } catch (AddressException e) {
            e.printStackTrace();
        } catch (MessagingException e) {
            e.printStackTrace();
        } finally {
            if (null != transport) {
                try {
                    transport.close();
                } catch (MessagingException e) {
                    e.printStackTrace();
                }
            }
        }
    }
 
}

需要引入的依赖：

<dependency>
    <groupId>javax.mail</groupId>
    <artifactId>mail</artifactId>
    <version>1.4.7</version>
</dependency>

全文完，如果本文对您有所帮助，请花 1 秒钟帮忙点击一下广告，谢谢。

作者： BridgeLi，https://www.bridgeli.cn
原文链接：http://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。

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