<!-- maven 依赖 -->
<dependency><groupId>javax.mail</groupId><artifactId>mail</artifactId><version>1.4.7</version>
</dependency>

package com.example.zgz.demo;import java.io.File;
import java.util.List;/*** @author zhangguangze* @version v1.0* @project: zgz* @description: 这里描述类的用处* @copyright: © 2018* @company:* @date 2018/5/17 15:02*/
public class SendEmailVO {private String from;private String password;private String subject;private String content;private List<String> toArr;private List<String> ccArr;private List<File> attachArr;public String getFrom() {return from;}public void setFrom(String from) {this.from = from;}public String getPassword() {return password;}public void setPassword(String password) {this.password = password;}public String getSubject() {return subject;}public void setSubject(String subject) {this.subject = subject;}public String getContent() {return content;}public void setContent(String content) {this.content = content;}public List<String> getToArr() {return toArr;}public void setToArr(List<String> toArr) {this.toArr = toArr;}public List<String> getCcArr() {return ccArr;}public void setCcArr(List<String> ccArr) {this.ccArr = ccArr;}public List<File> getAttachArr() {return attachArr;}public void setAttachArr(List<File> attachArr) {this.attachArr = attachArr;}
}

package com.example.zgz.demo;import javax.mail.PasswordAuthentication;
import javax.mail.Session;
import java.util.ArrayList;
import java.util.List;
import java.util.Properties;
import javax.activation.DataHandler;
import javax.activation.DataSource;
import javax.activation.FileDataSource;
import javax.mail.Authenticator;
import javax.mail.BodyPart;
import javax.mail.Message;
import javax.mail.Transport;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeBodyPart;
import javax.mail.internet.MimeMessage;
import javax.mail.internet.MimeMultipart;
import javax.mail.internet.MimeUtility;
import java.io.File;
import java.util.Date;/*** @author zhangguangze* @version v1.0* @project: zgz* @description: 这里描述类的用处* @copyright: © 2018* @company:* @date 2018/5/17 13:56*/
public class EmailUtil {private static String host = "mail.qq.com";private static String port = "25";private static String userName = "xx@qq.com";private static String password = "xxxxx";/*** 发送邮件** @throws Exception*/private static void sendMail(SendEmailVO vo) throws Exception{Message mailMessage = getMessage(vo);MimeMultipart multipart = new MimeMultipart("mixed");//设置正文BodyPart messageBodyPart = new MimeBodyPart();String content = vo.getContent();messageBodyPart.setContent(content, "text/html; charset=utf-8");multipart.addBodyPart(messageBodyPart);//设置附件
        MimeBodyPart fileBodyPart;if(vo.getAttachArr()!=null && vo.getAttachArr().size()>0){for(File f :vo.getAttachArr()){fileBodyPart = new MimeBodyPart();DataSource fds = new FileDataSource(f);fileBodyPart.setDataHandler(new DataHandler(fds));fileBodyPart.setFileName(MimeUtility.encodeWord(f.getName()));multipart.addBodyPart(fileBodyPart);}}// 设置邮件消息的主要内容
        mailMessage.setContent(multipart);// 发送邮件
        Transport.send(mailMessage);}private static Message getMessage(SendEmailVO vo) throws Exception{Properties pro = System.getProperties();pro.put("mail.smtp.host", host);pro.put("mail.smtp.port", port);pro.put("mail.smtp.auth", "true");final PasswordAuthentication authentication = new PasswordAuthentication(vo.getFrom(),vo.getPassword());// 根据邮件会话属性和密码验证器构造一个发送邮件的sessionSession session = Session.getDefaultInstance(pro,new Authenticator(){@Overrideprotected PasswordAuthentication getPasswordAuthentication(){return authentication;}});// 根据session创建一个邮件消息Message mailMessage = new MimeMessage(session);// 设置邮件消息的发送者mailMessage.setFrom(new InternetAddress(vo.getFrom()));// 接收者List<String> toArr = vo.getToArr();ArrayList<InternetAddress> toAddArr = new ArrayList<>();for(String to : toArr){if(StringUtils.isNotBlank(to)){toAddArr.add(new InternetAddress(to));}}InternetAddress[] toAdds = toAddArr.toArray(new InternetAddress[toAddArr.size()]);mailMessage.setRecipients(Message.RecipientType.TO, toAdds);// 抄送List<String> ccArr = vo.getCcArr();if(ccArr != null && ccArr.size()>0){ArrayList<InternetAddress> ccAddArr = new ArrayList<>();for(String cc : ccArr){if(StringUtils.isNotBlank(cc)) {ccAddArr.add(new InternetAddress(cc));}}if(ccAddArr.size()>0){InternetAddress[] ccAdds = ccAddArr.toArray(new InternetAddress[ccAddArr.size()]);mailMessage.setRecipients(Message.RecipientType.CC, ccAdds);}}// 设置邮件消息的主题
        mailMessage.setSubject(vo.getSubject());// 设置邮件消息发送的时间mailMessage.setSentDate(new Date());return mailMessage;}/*** 发送内嵌图片和附件邮件** @throws Exceptionpublic void sendImageAndAttachmentMail() throws Exception{Properties pro = System.getProperties();pro.put("mail.smtp.host", host);pro.put("mail.smtp.port", port);pro.put("mail.smtp.auth", "true");// 根据邮件会话属性和密码验证器构造一个发送邮件的sessionSession sendMailSession = Session.getDefaultInstance(pro,new Authenticator(){@Overrideprotected PasswordAuthentication getPasswordAuthentication(){return new PasswordAuthentication(userName, password);}});// 根据session创建一个邮件消息Message mailMessage = new MimeMessage(sendMailSession);// 设置邮件消息的发送者mailMessage.setFrom(new InternetAddress(userName));// 创建邮件的接收者地址，并设置到邮件消息中mailMessage.setRecipient(Message.RecipientType.TO,new InternetAddress(to));// 设置邮件消息的主题mailMessage.setSubject("Test Email");// 设置邮件消息发送的时间mailMessage.setSentDate(new Date());// 正文MimeBodyPart text = new MimeBodyPart();text.setContent("我的头像：<img src='cid:headImg'>","text/html;charset=UTF-8");// 正文图片MimeBodyPart image = new MimeBodyPart();image.setDataHandler(new DataHandler(new FileDataSource("1_jianggujin.jpg")));image.setContentID("headImg");// 附件MimeBodyPart attach = new MimeBodyPart();DataHandler dh = new DataHandler(new FileDataSource("1_jianggujin.jpg"));attach.setDataHandler(dh);attach.setFileName(MimeUtility.encodeWord(dh.getName()));// 描述关系:正文和图片MimeMultipart mp1 = new MimeMultipart();mp1.addBodyPart(text);mp1.addBodyPart(image);mp1.setSubType("related");// 正文MimeBodyPart content = new MimeBodyPart();content.setContent(mp1);MimeMultipart multipart = new MimeMultipart("mixed");multipart.addBodyPart(content);multipart.addBodyPart(attach);mailMessage.setContent(multipart);// 发送邮件Transport.send(mailMessage);}*/public static void main(String[] args) throws Exception {SendEmailVO vo = new SendEmailVO();vo.setFrom(userName);vo.setPassword(password);vo.setSubject("Test");vo.setContent("<html><body><div style='font-weight:bold'>Dear All,<br>this is a test email.</div></body></html>");List<String> toArr = new ArrayList<>();toArr.add("xxxxx@qq.com");vo.setToArr(toArr);List<String> ccArr = new ArrayList<>();ccArr.add("sssss@qq.com");vo.setCcArr(ccArr);List<File> fileArr = new ArrayList<>();fileArr.add(new File("F:\\testpdf\\pdf\\test.txt"));vo.setAttachArr(fileArr);EmailUtil.sendMail(vo);}
}