1、引入依赖包

<dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-mail</artifactId>
</dependency>

2、配置文件

spring:mail:host: smtp.qq.com# 发送者的邮箱账号username: 1111@qq.com# 邮箱密码授权码password: ****default-encoding: utf-8properties:mail:debug: truesmtp:auth: truestarttls:enable: truerequired: true

3、业务逻辑

3.1 定义邮件发送类

@Data
public  class MailInfo {// 邮件接收人private String[] receiver;// 邮件主题private String subject;// 邮件的文本内容private String content;// 抄送人private String[] cc;// 邮件附件的文件名private String[] attachFileNames;// 邮件内容内嵌图片private Map<String,String> imageMap;
}

3.2 定义 ISendMsgHandle

public interface ISendMsgHandle {/*** 功能描述：发送text邮件* @param mailInfo 邮件信息* @return {@link }* @author weigang* @date 2021/12/29 9:27 上午*/void sendSimpleTextEmail(MailInfo mailInfo);/*** 功能描述：发送html邮件* @param mailInfo 邮件信息* @param html 是否是html邮件* @return {@link }* @author weigang* @date 2021/12/29 9:27 上午*/void sendHtmlEmail(MailInfo mailInfo,boolean html);/*** 功能描述：发送文本内容（内嵌图片）且带附件的html邮件* @param mailInfo 邮件信息* @return {@link }* @author wi-gang* @date 2021/12/29 2:49 下午*/void sendEnclosureEmail(MailInfo mailInfo);
}

3.3 邮件处理逻辑

import com.weigang.email.bean.MailInfo;
import com.weigang.email.handle.ISendMsgHandle;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.mail.SimpleMailMessage;
import org.springframework.mail.javamail.JavaMailSender;
import org.springframework.mail.javamail.MimeMessageHelper;
import org.springframework.stereotype.Component;import javax.activation.DataHandler;
import javax.activation.FileDataSource;
import javax.annotation.Resource;
import javax.mail.internet.MimeBodyPart;
import javax.mail.internet.MimeMessage;
import javax.mail.internet.MimeMultipart;
import java.util.*;@Slf4j
@Component
public class EmailSendMsgHandle implements ISendMsgHandle {@Resourceprivate JavaMailSender javaMailSender;@Value(value = "${spring.mail.username}")private String emailFrom;@Overridepublic void sendSimpleTextEmail(MailInfo mailInfo) {try {SimpleMailMessage mailMessage = new SimpleMailMessage();//发件人mailMessage.setFrom(emailFrom);//接收人mailMessage.setTo(mailInfo.getReceiver());//邮件主题mailMessage.setSubject(mailInfo.getSubject());//邮件抄送mailMessage.setCc(mailInfo.getCc());//邮件内容mailMessage.setText(mailInfo.getContent());//发送邮件javaMailSender.send(mailMessage);} catch (Exception e) {log.error("邮件发送失败:{}", e.getMessage());}}@Overridepublic void sendHtmlEmail(MailInfo mailInfo,boolean html) {try {MimeMessage mimeMailMessage = javaMailSender.createMimeMessage();//true 表示需要创建一个multipart messageMimeMessageHelper mimeMessageHelper = new MimeMessageHelper(mimeMailMessage);//发件人mimeMessageHelper.setFrom(emailFrom);//接收人mimeMessageHelper.setTo(mailInfo.getReceiver());//邮件主题mimeMessageHelper.setSubject(mailInfo.getSubject());//邮件抄送mimeMessageHelper.setCc(mailInfo.getCc());//邮件内容mimeMessageHelper.setText(mailInfo.getContent(), html);javaMailSender.send(mimeMailMessage);} catch (Exception e) {log.error("邮件发送失败:{}", e.getMessage());}}@Overridepublic void sendEnclosureEmail(MailInfo mailInfo) {try {MimeMessage mimeMailMessage = javaMailSender.createMimeMessage();//true 表示需要创建一个multipart messageMimeMessageHelper mimeMessageHelper = new MimeMessageHelper(mimeMailMessage, true);//发件人mimeMessageHelper.setFrom(emailFrom);//邮件接收人mimeMessageHelper.setTo(mailInfo.getReceiver());//邮件主题mimeMessageHelper.setSubject(mailInfo.getSubject());//邮件抄送mimeMessageHelper.setCc(mailInfo.getCc());//设置显示的发件时间mimeMessageHelper.setSentDate(new Date());MimeMultipart allMultipart = new MimeMultipart();//创建代表邮件正文和附件的各个MimeBodyPart对象MimeBodyPart contentPart = createContent(mailInfo.getContent(), mailInfo.getImageMap());allMultipart.addBodyPart(contentPart);//创建用于组合邮件正文和附件的MimeMultipart对象for (int i = 0; i < mailInfo.getAttachFileNames().length; i++) {allMultipart.addBodyPart(createAttachment(mailInfo.getAttachFileNames()[i]));}//设置整个邮件内容为最终组合出的MimeMultipart对象mimeMailMessage.setContent(allMultipart);mimeMailMessage.saveChanges();javaMailSender.send(mimeMailMessage);} catch (Exception e) {log.error("邮件发送失败:{}", e.getMessage());}}/*** 功能描述：邮件附件* @param filename 文件路径* @return {@link MimeBodyPart}* @author wi-gang* @date 2021/12/29 2:50 下午*/public MimeBodyPart createAttachment(String filename) throws Exception {//创建保存附件的MimeBodyPart对象，并加入附件内容和相应的信息MimeBodyPart attachPart = new MimeBodyPart();FileDataSource fsd = new FileDataSource(filename);attachPart.setDataHandler(new DataHandler(fsd));attachPart.setFileName(fsd.getName());return attachPart;}/*** 功能描述：文本内容* @param body html格式的文本内容* @return {@link MimeBodyPart}* @author wi-gang* @date 2021/12/29 2:50 下午*/public MimeBodyPart createContent(String body) throws Exception {//创建代表组合Mime消息的MimeMultipart对象，将该MimeMultipart对象保存到MimeBodyPart对象MimeBodyPart contentPart = new MimeBodyPart();MimeMultipart contentMultipart = new MimeMultipart("related");//创建用于保存HTML正文的MimeBodyPart对象，并将它保存到MimeMultipart中MimeBodyPart htmlBodyPart = new MimeBodyPart();htmlBodyPart.setContent(body, "text/html;charset=UTF-8");contentMultipart.addBodyPart(htmlBodyPart);//将MimeMultipart对象保存到MimeBodyPart对象contentPart.setContent(contentMultipart);return contentPart;}/*** 功能描述：文本内嵌图片* @param body html格式的文本内容* @param map 图片集合* @return {@link MimeBodyPart}* @author wi-gang* @date 2021/12/29 2:50 下午*/public MimeBodyPart createContent(String body, Map<String, String> map) throws Exception {//创建代表组合Mime消息的MimeMultipart对象，将该MimeMultipart对象保存到MimeBodyPart对象MimeBodyPart contentPart = new MimeBodyPart();MimeMultipart contentMultipart = new MimeMultipart("related");//创建用于保存HTML正文的MimeBodyPart对象，并将它保存到MimeMultipart中MimeBodyPart htmlBodyPart = new MimeBodyPart();htmlBodyPart.setContent(body, "text/html;charset=UTF-8");contentMultipart.addBodyPart(htmlBodyPart);if (map != null && map.size() > 0) {Set<Map.Entry<String, String>> set = map.entrySet();for (Map.Entry<String, String> entry : set) {//创建用于保存图片的MimeBodyPart对象，并将它保存到MimeMultipart中MimeBodyPart gifBodyPart = new MimeBodyPart();FileDataSource fds = new FileDataSource(entry.getValue());//图片所在的目录的绝对路径gifBodyPart.setDataHandler(new DataHandler(fds));gifBodyPart.setContentID(entry.getKey());    //cid的值contentMultipart.addBodyPart(gifBodyPart);}}//将MimeMultipart对象保存到MimeBodyPart对象contentPart.setContent(contentMultipart);return contentPart;}
}

3.4 测试

（1）简单邮件发送

    @Testvoid sendSimpleTextEmail() {MailInfo mailInfo = new MailInfo();mailInfo.setReceiver(new String[]{"11111@qq.com"});mailInfo.setSubject("测试主题");mailInfo.setContent("邮件内容");emailSendMsgHandle.sendSimpleTextEmail(mailInfo);}

（2）以html格式发送

    @Testpublic void sendHTMLMail() {MailInfo mailBean = new MailInfo();//接收人mailBean.setReceiver(new String[]{"11111@qq.com"});mailBean.setSubject("SpringBootMailHTML之这是一封HTML格式的邮件");//抄送给谁mailBean.setCc(new String[]{"11111@qq.com","winsky.com"});StringBuilder sb = new StringBuilder();sb.append("<h2>SpirngBoot测试邮件HTML</h2>").append("<p style='text-align:left'>这是一封HTML邮件...</p>").append("<p> 时间为："+ new Date() +"</p>");mailBean.setContent(sb.toString());//true、false控制以普通文本发送还是以html格式发送emailSendMsgHandle.sendHtmlEmail(mailBean,true);}

（2）以html格式发送并带附件

    @Testvoid sendEmail() {MailInfo mailBean = new MailInfo();mailBean.setReceiver(new String[]{"11111@qq.com"});mailBean.setSubject("SpringBootMailHTML之这是一封HTML格式的邮件");mailBean.setCc(new String[]{"11111@qq.com","winsky.com"});StringBuilder sb = new StringBuilder();sb.append("<h2>SpirngBoot测试邮件HTML</h2>").append("<p style='text-align:left'>这是一封HTML邮件...</p>").append("<p> 时间为："+ new Date() +"</p>");mailBean.setContent(sb.toString());mailBean.setAttachFileNames(new String[]{"/Users/Downloads/密码管理.xlsx","/Users/Downloads/1635834323888.jpg"});emailSendMsgHandle.sendEnclosureEmail(mailBean);}

（3）以html格式内嵌图片并带附件发送

    @Testvoid sendEmail2() {MailInfo mailBean = new MailInfo();mailBean.setReceiver(new String[]{"111111@qq.com"});mailBean.setSubject("SpringBootMailHTML之这是一封HTML格式的邮件");mailBean.setCc(new String[]{"111111@qq.com","winsky.com"});StringBuilder sb = new StringBuilder();sb.append("<h2>SpirngBoot测试邮件HTML</h2>").append("<p style='text-align:left'>这是一封HTML邮件...</p>").append("<a href=http://www.baidu.com>点击进入百度</a><br/>")//内嵌图片.append("<img src=\"cid:a00000001\"><br/><br/>").append("<img src=\"cid:a00000002\">").append("<p> 时间为："+ new Date() +"</p>");mailBean.setContent(sb.toString());//附件mailBean.setAttachFileNames(new String[]{"/Users/Downloads/密码管理.xlsx","/Users/Downloads/1635834323888.jpg"});//内嵌了多少张图片，如果没有，则new一个不带值的MapMap<String,String> image = new HashMap<>();image.put("a00000001", "/Users/Downloads/WechatIMG22.jpg");image.put("a00000002", "/Users/Downloads/face_1631083961355.png");mailBean.setImageMap(image);emailSendMsgHandle.sendEnclosureEmail(mailBean);}

（4）以表格的形式发送邮件

log.info(" --- 任务调度开始 --- ");try {//查询维保时间即将过期的产品List<CustomerProductVo> customerProductList = customerService.selectCustomerProductList();//根据项目编号去重List<CustomerProductVo> newCustomerProductList = customerProductList.stream().filter(distinctByKey(CustomerProductVo::getProjectCode)).collect(Collectors.toList());//发送邮件MailInfo mailBean = new MailInfo();
//            mailBean.setReceiver(new String[]{"weg@bj.com"});mailBean.setSubject("维保时间即将过期的客户产品");mailBean.setCc(new String[]{"weg@bj.com"});StringBuilder stringBuilder = new StringBuilder();//表格制作stringBuilder.append("\r\n");stringBuilder.append("<html><head></head><body><h2>您好，以下内容是维保时间即将过期的客户产品，请及时处理！</h2>");stringBuilder.append("<table border=\"5\" style=\"border:solid 1px #E8F2F9;font-size=14px;;font-size:22px;\">");stringBuilder.append("<tr style=\"background-color: #428BCA; color:#ffffff\">" +"<th width=\"180px\">客户中文名称</th>" +"<th width=\"180px\">客户英文名称</th>" +"<th width=\"180px\">项目名称</th>" +"<th width=\"180px\">项目编号</th>" +
//                    "<th width=\"180px\">产品名称</th>" +
//                    "<th width=\"180px\">产品版本</th>" +"<th width=\"180px\">查询时间</th>" +"<th width=\"200px\">维保结束时间</th>" +"</tr>");for (CustomerProductVo vo : newCustomerProductList) {stringBuilder.append("</tr>");stringBuilder.append("<td style=\"text-align:center\">" + vo.getCustomerChName() + "</td>");stringBuilder.append("<td style=\"text-align:center\">" + vo.getCustomerEnName() + "</td>");stringBuilder.append("<td style=\"text-align:center\">" + vo.getProjectName() + "</td>");stringBuilder.append("<td style=\"text-align:center\">" + vo.getProjectCode() + "</td>");
//                stringBuilder.append("<td style=\"text-align:center\">" + vo.getProductName() + "</td>");
//                stringBuilder.append("<td style=\"text-align:center\">" + vo.getProductVersion() + "</td>");stringBuilder.append("<td style=\"text-align:center\">" + DateUtils.date2Str(new SimpleDateFormat("yyyy-MM-dd")) + "</td>");stringBuilder.append("<td style=\"text-align:center\">" + DateUtils.date2Str(vo.getDealine(),new SimpleDateFormat("yyyy-MM-dd")) + "</td>");stringBuilder.append("</tr>");}stringBuilder.append("</table>");stringBuilder.append("</body></html>");//发送邮件mailBean.setContent(stringBuilder.toString());emailSendMsgHandle.sendHtmlEmail(mailBean,true);} catch (Exception e) {e.printStackTrace();log.error("邮件发送失败，失败原因是：{}",e.getMessage());}log.info(" --- 执行完毕，时间："+DateUtils.now()+"---");

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Springboot 邮件发送(html内嵌图片、附件)

1、引入依赖包

2、配置文件

3、业务逻辑

3.1 定义邮件发送类

3.2 定义 ISendMsgHandle

3.3 邮件处理逻辑

3.4 测试

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