Spring MVC发送邮件

        Spring发送html邮件一文件阐述了使用Spring发送html邮件的方法，根据该文，作者写了一个综合的发送邮件的工具类MailUtil，如下所示：

/** * * @author geloin * @date 2012-5-8 上午11:02:41 */package com.embest.ruisystem.util;import java.io.File;import java.util.ArrayList;import java.util.HashMap;import java.util.Iterator;import java.util.List;import java.util.Map;import java.util.Properties;import javax.mail.Session;import javax.mail.internet.MimeMessage;import org.springframework.core.io.FileSystemResource;import org.springframework.mail.javamail.JavaMailSenderImpl;import org.springframework.mail.javamail.MimeMessageHelper;/** *  * @author geloin * @date 2012-5-8 上午11:02:41 */public class MailUtil {/** * 发件人邮箱服务器 */private String emailHost;/** * 发件人邮箱 */private String emailFrom;/** * 发件人用户名 */private String emailUserName;/** * 发件人密码 */private String emailPassword;/** * 收件人邮箱，多个邮箱以“;”分隔 */private String toEmails;/** * 邮件主题 */private String subject;/** * 邮件内容 */private String content;/** * 邮件中的图片，为空时无图片。map中的key为图片ID，value为图片地址 */private Map<String, String> pictures;/** * 邮件中的附件，为空时无附件。map中的key为附件ID，value为附件地址 */private Map<String, String> attachments;/** *  * @author geloin * @date 2012-5-9 上午10:49:01 * @return the emailHost */public String getEmailHost() {emailHost = DataUtil.objToStr(emailHost);if (emailHost.equals("")) {emailHost = Constants.emailHost;}return emailHost;}/** *  * @author geloin * @date 2012-5-9 上午10:49:01 * @param emailHost *            the emailHost to set */public void setEmailHost(String emailHost) {this.emailHost = emailHost;}/** *  * @author geloin * @date 2012-5-9 上午10:49:01 * @return the emailFrom */public String getEmailFrom() {emailFrom = DataUtil.objToStr(emailFrom);if (emailFrom.equals("")) {emailFrom = Constants.emailFrom;}return emailFrom;}/** *  * @author geloin * @date 2012-5-9 上午10:49:01 * @param emailFrom *            the emailFrom to set */public void setEmailFrom(String emailFrom) {this.emailFrom = emailFrom;}/** *  * @author geloin * @date 2012-5-9 上午10:49:01 * @return the emailUserName */public String getEmailUserName() {emailUserName = DataUtil.objToStr(emailUserName);if (emailUserName.equals("")) {emailUserName = Constants.emailUsername;}return emailUserName;}/** *  * @author geloin * @date 2012-5-9 上午10:49:01 * @param emailUserName *            the emailUserName to set */public void setEmailUserName(String emailUserName) {this.emailUserName = emailUserName;}/** *  * @author geloin * @date 2012-5-9 上午10:49:01 * @return the emailPassword */public String getEmailPassword() {emailPassword = DataUtil.objToStr(emailPassword);if (emailPassword.equals("")) {emailPassword = Constants.emailPassword;}return emailPassword;}/** *  * @author geloin * @date 2012-5-9 上午10:49:01 * @param emailPassword *            the emailPassword to set */public void setEmailPassword(String emailPassword) {this.emailPassword = emailPassword;}/** *  * @author geloin * @date 2012-5-9 上午10:49:01 * @return the toEmails */public String getToEmails() {return DataUtil.objToStr(toEmails);}/** *  * @author geloin * @date 2012-5-9 上午10:49:01 * @param toEmails *            the toEmails to set */public void setToEmails(String toEmails) {this.toEmails = toEmails;}/** *  * @author geloin * @date 2012-5-9 上午10:49:01 * @return the subject */public String getSubject() {subject = DataUtil.objToStr(subject);if (subject.equals("")) {subject = "无主题";}return DataUtil.objToStr(subject);}/** *  * @author geloin * @date 2012-5-9 上午10:49:01 * @param subject *            the subject to set */public void setSubject(String subject) {this.subject = subject;}/** *  * @author geloin * @date 2012-5-9 上午10:49:01 * @return the content */public String getContent() {return DataUtil.objToStr(content);}/** *  * @author geloin * @date 2012-5-9 上午10:49:01 * @param content *            the content to set */public void setContent(String content) {this.content = content;}/** *  * @author geloin * @date 2012-5-9 上午10:49:01 * @return the pictures */public Map<String, String> getPictures() {return pictures;}/** *  * @author geloin * @date 2012-5-9 上午10:49:01 * @param pictures *            the pictures to set */public void setPictures(Map<String, String> pictures) {this.pictures = pictures;}/** *  * @author geloin * @date 2012-5-9 上午10:49:01 * @return the attachments */public Map<String, String> getAttachments() {return attachments;}/** *  * @author geloin * @date 2012-5-9 上午10:49:01 * @param attachments *            the attachments to set */public void setAttachments(Map<String, String> attachments) {this.attachments = attachments;}/** * 发送邮件 *  * @author geloin * @date 2012-5-9 上午11:18:21 * @throws Exception */public void sendEmail() throws Exception {if (this.getEmailHost().equals("") || this.getEmailFrom().equals("")|| this.getEmailUserName().equals("")|| this.getEmailPassword().equals("")) {throw new RuntimeException("发件人信息不完全，请确认发件人信息！");}JavaMailSenderImpl senderImpl = new JavaMailSenderImpl();// 设定mail serversenderImpl.setHost(emailHost);// 建立邮件消息MimeMessage mailMessage = senderImpl.createMimeMessage();MimeMessageHelper messageHelper = null;messageHelper = new MimeMessageHelper(mailMessage, true, "UTF-8");// 设置发件人邮箱messageHelper.setFrom(emailFrom);// 设置收件人邮箱String[] toEmailArray = toEmails.split(";");List<String> toEmailList = new ArrayList<String>();if (null == toEmailArray || toEmailArray.length <= 0) {throw new RuntimeException("收件人邮箱不得为空！");} else {for (String s : toEmailArray) {s = DataUtil.objToStr(s);if (!s.equals("")) {toEmailList.add(s);}}if (null == toEmailList || toEmailList.size() <= 0) {throw new RuntimeException("收件人邮箱不得为空！");} else {toEmailArray = new String[toEmailList.size()];for (int i = 0; i < toEmailList.size(); i++) {toEmailArray[i] = toEmailList.get(i);}}}messageHelper.setTo(toEmailArray);// 邮件主题messageHelper.setSubject(subject);// true 表示启动HTML格式的邮件messageHelper.setText(content, true);// 添加图片if (null != pictures) {for (Iterator<Map.Entry<String, String>> it = pictures.entrySet().iterator(); it.hasNext();) {Map.Entry<String, String> entry = it.next();String cid = entry.getKey();String filePath = entry.getValue();if (null == cid || null == filePath) {throw new RuntimeException("请确认每张图片的ID和图片地址是否齐全！");}File file = new File(filePath);if (!file.exists()) {throw new RuntimeException("图片" + filePath + "不存在！");}FileSystemResource img = new FileSystemResource(file);messageHelper.addInline(cid, img);}}// 添加附件if (null != attachments) {for (Iterator<Map.Entry<String, String>> it = attachments.entrySet().iterator(); it.hasNext();) {Map.Entry<String, String> entry = it.next();String cid = entry.getKey();String filePath = entry.getValue();if (null == cid || null == filePath) {throw new RuntimeException("请确认每个附件的ID和地址是否齐全！");}File file = new File(filePath);if (!file.exists()) {throw new RuntimeException("附件" + filePath + "不存在！");}FileSystemResource fileResource = new FileSystemResource(file);messageHelper.addAttachment(cid, fileResource);}}Properties prop = new Properties();prop.put("mail.smtp.auth", "true"); // 将这个参数设为true，让服务器进行认证,认证用户名和密码是否正确prop.put("mail.smtp.timeout", "25000");// 添加验证MyAuthenticator auth = new MyAuthenticator(emailUserName, emailPassword);Session session = Session.getDefaultInstance(prop, auth);senderImpl.setSession(session);// 发送邮件senderImpl.send(mailMessage);}public static void main(String[] args) throws Exception {MailUtil mu = new MailUtil();// test1(mu);// test2(mu);// test3(mu);// test4(mu);// test5(mu);test6(mu);}public static void test1(MailUtil mu) throws Exception {String toEmails = "[e-mail]";String subject = "第一封，简单文本邮件";StringBuilder builder = new StringBuilder();builder.append("我相信天上不会掉馅饼");String content = builder.toString();mu.setToEmails(toEmails);mu.setSubject(subject);mu.setContent(content);mu.sendEmail();}public static void test2(MailUtil mu) throws Exception {String toEmails = "[e-mail]";String subject = "第二封，HTML邮件";StringBuilder builder = new StringBuilder();builder.append("<html><body>老婆：<br />我是你的老公吗？<br />是的，是很久了。<br /></body></html>");String content = builder.toString();mu.setToEmails(toEmails);mu.setSubject(subject);mu.setContent(content);mu.sendEmail();}public static void test3(MailUtil mu) throws Exception {String toEmails = "[e-mail]";String subject = "第三封，图片邮件";Map<String, String> pictures = new HashMap<String, String>();pictures.put("d1", "D:/work/download/d1.jpg");pictures.put("d2", "D:/work/download/测试图片2.jpg");pictures.put("d3", "D:/work/download/d3.jpg");StringBuilder builder = new StringBuilder();builder.append("<html><body>看看下面的图，你会知道花儿为什么是这样红的：<br />");builder.append("<img src=\"cid:d1\" /><br />");builder.append("<img src=\"cid:d2\" /><br />");builder.append("<img src=\"cid:d3\" /><br />");builder.append("</body></html>");String content = builder.toString();mu.setToEmails(toEmails);mu.setSubject(subject);mu.setContent(content);mu.setPictures(pictures);mu.sendEmail();}public static void test4(MailUtil mu) throws Exception {String toEmails = "[e-mail]";String subject = "第四封，附件邮件";Map<String, String> attachments = new HashMap<String, String>();attachments.put("d1.jar", "D:/work/download/activation.jar");attachments.put("d2.doc","C:/Documents and Settings/Administrator/桌面/Java设计模式.doc");StringBuilder builder = new StringBuilder();builder.append("<html><body>看看附件中的资料，你会知道世界为什么是平的。</body></html>");String content = builder.toString();mu.setToEmails(toEmails);mu.setSubject(subject);mu.setContent(content);mu.setAttachments(attachments);mu.sendEmail();}public static void test5(MailUtil mu) throws Exception {String toEmails = "[e-mail]";String subject = "第五封，综合邮件";Map<String, String> attachments = new HashMap<String, String>();attachments.put("d1.jar", "D:/work/download/activation.jar");attachments.put("d2.doc","C:/Documents and Settings/Administrator/桌面/Java设计模式.doc");Map<String, String> pictures = new HashMap<String, String>();pictures.put("d1", "D:/work/download/d1.jpg");pictures.put("d2", "D:/work/download/测试图片2.jpg");pictures.put("d3", "D:/work/download/d3.jpg");StringBuilder builder = new StringBuilder();builder.append("<html><body>看看附件中的资料，你会知道世界为什么是平的。<br />");builder.append("看看下面的图，你会知道花儿为什么是这样红的：<br />");builder.append("<img src=\"cid:d1\" /><br />");builder.append("<img src=\"cid:d2\" /><br />");builder.append("<img src=\"cid:d3\" /><br />");builder.append("</body></html>");String content = builder.toString();mu.setToEmails(toEmails);mu.setSubject(subject);mu.setContent(content);mu.setPictures(pictures);mu.setAttachments(attachments);mu.sendEmail();}public static void test6(MailUtil mu) throws Exception {String toEmails = "[e-mail];[e-mail]";String subject = "第五封，群发邮件";Map<String, String> attachments = new HashMap<String, String>();attachments.put("d1.jar", "D:/work/download/activation.jar");attachments.put("d2.doc","C:/Documents and Settings/Administrator/桌面/Java设计模式.doc");Map<String, String> pictures = new HashMap<String, String>();pictures.put("d1", "D:/work/download/d1.jpg");pictures.put("d2", "D:/work/download/测试图片2.jpg");pictures.put("d3", "D:/work/download/d3.jpg");StringBuilder builder = new StringBuilder();builder.append("<html><body>看看附件中的资料，你会知道世界为什么是平的。<br />");builder.append("看看下面的图，你会知道花儿为什么是这样红的：<br />");builder.append("<img src=\"cid:d1\" /><br />");builder.append("<img src=\"cid:d2\" /><br />");builder.append("<img src=\"cid:d3\" /><br />");builder.append("</body></html>");String content = builder.toString();mu.setToEmails(toEmails);mu.setSubject(subject);mu.setContent(content);mu.setPictures(pictures);mu.setAttachments(attachments);mu.sendEmail();}}

        上文的sendEmail方法即为发送邮件的主要方法，test1-test6分别是各种邮件的示例。

        上文中的MyAuthenticator辅助类为发件人信息验证类，该类代码如下所示：

/** * * @author geloin * @date 2012-5-8 下午2:48:25 */package com.embest.ruisystem.util;import javax.mail.Authenticator;import javax.mail.PasswordAuthentication;/** *  * @author geloin * @date 2012-5-8 下午2:48:25 */public class MyAuthenticator extends Authenticator {private String username;private String password;/** *  * @author geloin * @date 2012-5-8 下午2:48:53 * @param username * @param password */public MyAuthenticator(String username, String password) {super();this.username = username;this.password = password;}protected PasswordAuthentication getPasswordAuthentication() {return new PasswordAuthentication(username, password);}}

        MailUtil中的Constants是作者自定义的一个工具类，该类的主要作用是从配置文件中获取发件人信息，包括发件人服务器、发件人邮箱、发件人账户和密码等。

        DataUtil.objToStr(String str)方法的主要作用是判断str是否为null或空字符串，若是，则返回空字符串，否则返回str.trim()。