1.准备工作
1）下载mail-1.4.jar
2) 下载activation-1.1.jar
如果是maven项目，引入依赖：
<!-- https://mvnrepository.com/artifact/javax.mail/mail --> <dependency> <groupId>javax.mail</groupId> <artifactId>mail</artifactId> <version>1.5.0-b01</version> </dependency> <!-- https://mvnrepository.com/artifact/javax.activation/activation --> <dependency> <groupId>javax.activation</groupId> <artifactId>activation</artifactId> <version>1.1.1</version> </dependency>
2.工具类MailUtil.java
package com.syy.community._gaowenbin.util; import java.util.ArrayList; import java.util.List; import java.util.Map; import java.util.Properties; import javax.activation.DataHandler; import javax.activation.FileDataSource; import javax.mail.Authenticator; import javax.mail.Message; import javax.mail.MessagingException; import javax.mail.PasswordAuthentication; import javax.mail.Session; import javax.mail.Transport; import javax.mail.internet.InternetAddress; import javax.mail.internet.MimeBodyPart; import javax.mail.internet.MimeMessage; import javax.mail.internet.MimeMultipart; /** * * 邮件发送的工具类 * @author HUAWEI * */ public class MailUtil { /** * 创建简单的文本邮件 * @param session * @param mailfrom 邮件发送方地址 eg.xx@qq.com * @param mailTo 邮件接收方地址，eg.xx@qq.com * @param mailTittle 邮件标题 * @param mailText 邮件文本主体 * @return * @throws Exception */ public static MimeMessage createSimpleMail(Session session, String mailfrom, String mailTo, String mailTittle, String mailText) throws Exception { // 创建邮件对象 MimeMessage message = new MimeMessage(session); // 指明邮件的发件人 message.setFrom(new InternetAddress(mailfrom)); // 指明邮件的收件人，现在发件人和收件人是一样的，那就是自己给自己发 message.setRecipient(Message.RecipientType.TO, new InternetAddress(mailTo)); // 邮件的标题 message.setSubject(mailTittle); // 邮件的文本内容 message.setContent(mailText, "text/html;charset=UTF-8"); // 返回创建好的邮件对象 return message; } /** * 创建图文邮件 * @param session * @param mailMap 邮件的所有内容的包装 * @param hasfujian 若为true，mailMap中必须包含相应的信息 * @return * @throws MessagingException */ public static MimeMessage imageMail(Session session,Map<String,Object> mailMap,boolean hasfujian) throws MessagingException { //消息的固定信息 MimeMessage mimeMessage = new MimeMessage(session); //邮件发送人 mimeMessage.setFrom(new InternetAddress(mailMap.get("from").toString())); //邮件接收人，可以同时发送给很多人 mimeMessage.setRecipient(Message.RecipientType.TO, new InternetAddress(mailMap.get("to").toString())); mimeMessage.setSubject(mailMap.get("title").toString()); //邮件主题 //图片 MimeBodyPart body1 = new MimeBodyPart(); body1.setDataHandler(new DataHandler(new FileDataSource(mailMap.get("datasrc").toString()))); body1.setContentID(mailMap.get("contentid").toString()); //图片设置ID //文本 MimeBodyPart body2 = new MimeBodyPart(); body2.setContent(mailMap.get("content"),"text/html;charset=utf-8"); if(hasfujian){ List<Map<String,String>> listmap = (List<Map<String, String>>) mailMap.get("fujian"); List<MimeBodyPart> fjlist = new ArrayList<MimeBodyPart>(); for(Map<String, String> item:listmap){ //附件 MimeBodyPart body = new MimeBodyPart(); body.setDataHandler(new DataHandler(new FileDataSource(item.get("filesrc").toString()))); body.setFileName(item.get("filename")); //附件设置名字 fjlist.add(body); //拼装邮件正文内容 MimeMultipart multipart1 = new MimeMultipart(); multipart1.addBodyPart(body1); multipart1.addBodyPart(body2); multipart1.setSubType("related"); //文本和图片内嵌成功！ //new MimeBodyPart().setContent(multipart1); //将拼装好的正文内容设置为主体 MimeBodyPart contentText = new MimeBodyPart(); contentText.setContent(multipart1); //拼接附件 MimeMultipart allFile =new MimeMultipart(); for(MimeBodyPart mbp:fjlist){ allFile.addBodyPart(mbp); //附件 } allFile.addBodyPart(contentText);//正文 allFile.setSubType("mixed"); //正文和附件都存在邮件中，所有类型设置为mixed； //放到Message消息中 mimeMessage.setContent(allFile); mimeMessage.saveChanges();//保存修改 } }else{ //拼装邮件正文内容 MimeMultipart multipart1 = new MimeMultipart(); multipart1.addBodyPart(body1); multipart1.addBodyPart(body2); multipart1.setSubType("related"); //1.txt.文本和图片内嵌成功！ //new MimeBodyPart().setContent(multipart1); //将拼装好的正文内容设置为主体 MimeBodyPart contentText = new MimeBodyPart(); contentText.setContent(multipart1); //拼接附件 MimeMultipart allFile =new MimeMultipart(); allFile.addBodyPart(contentText);//正文 allFile.setSubType("mixed"); //正文和附件都存在邮件中，所有类型设置为mixed； //放到Message消息中 mimeMessage.setContent(allFile); mimeMessage.saveChanges();//保存修改 } return mimeMessage; } /** * 发送邮件方法封装 * @param contentMap 邮件配置的map * @param imgmial 是否为带图邮件 * @param hasfujian 是否有附件 * @throws Exception */ public static void sendMail(final Map<String, Object> contentMap,boolean imgmial,boolean hasfujian) throws Exception{ Properties prop = new Properties(); //设置QQ邮件服务器 prop.setProperty("mail.host", contentMap.get("host").toString()); //邮件发送协议 prop.setProperty("mail.transport.protocol", "smtp"); //需要验证用户名密码 prop.setProperty("mail.smtp.auth", "true"); //关于QQ邮箱，还要设置SSL加密，加上以下代码即可 //MailSSLSocketFactory sf = new MailSSLSocketFactory(); //sf.setTrustAllHosts(true); prop.put("mail.smtp.ssl.enable", "true"); // prop.put("mail.smtp.ssl.socketFactory", sf); //使用JavaMail发送邮件的5个步骤 //1.txt、创建定义整个应用程序所需的环境信息的Session对象 Session session = Session.getDefaultInstance(prop, new Authenticator() { public PasswordAuthentication getPasswordAuthentication() { //发件人邮件用户名、授权码 return new PasswordAuthentication(contentMap.get("from").toString(), contentMap.get("password").toString()); } }); //可以通过session开启Dubug模式，查看所有的过程 session.setDebug(true); //2.获取连接对象，通过session对象获得Transport，需要捕获或者抛出异常； Transport tp = session.getTransport(); //3.连接服务器,需要抛出异常； tp.connect(contentMap.get("host").toString(),contentMap.get("from").toString(),contentMap.get("password").toString()); MimeMessage mimeMessage = null; //4.连接上之后我们需要发送邮件； if(imgmial){ mimeMessage = imageMail(session,contentMap,hasfujian); }else{ mimeMessage = createSimpleMail(session, contentMap.get("from").toString(), contentMap.get("to").toString(), contentMap.get("title").toString(), contentMap.get("content").toString()); } //5.发送邮件 tp.sendMessage(mimeMessage,mimeMessage.getAllRecipients()); //6.关闭连接 tp.close(); } }