2、配置文件org.springframework.boot spring-boot-starter-mail
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-8
properties:
mail:
debug: true
smtp:
auth: true
starttls:
enable: true
required: 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 imageMap;
}
3.2 定义 ISendMsgHandle
public interface ISendMsgHandle {
void sendSimpleTextEmail(MailInfo mailInfo);
void sendHtmlEmail(MailInfo mailInfo,boolean html);
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 {
@Resource
private JavaMailSender javaMailSender;
@Value(value = "${spring.mail.username}")
private String emailFrom;
@Override
public 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());
}
}
@Override
public void sendHtmlEmail(MailInfo mailInfo,boolean html) {
try {
MimeMessage mimeMailMessage = javaMailSender.createMimeMessage();
//true 表示需要创建一个multipart message
MimeMessageHelper 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());
}
}
@Override
public void sendEnclosureEmail(MailInfo mailInfo) {
try {
MimeMessage mimeMailMessage = javaMailSender.createMimeMessage();
//true 表示需要创建一个multipart message
MimeMessageHelper 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());
}
}
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;
}
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;
}
public MimeBodyPart createContent(String body, Map 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> set = map.entrySet();
for (Map.Entry 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
@Test
void 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
@Test
public 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("SpirngBoot测试邮件HTML")
.append("这是一封HTML邮件...
")
.append(" 时间为："+ new Date() +"
");
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
@Test
void 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("SpirngBoot测试邮件HTML")
.append("这是一封HTML邮件...
")
.append(" 时间为："+ new Date() +"
");
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
@Test
void 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("SpirngBoot测试邮件HTML")
.append("这是一封HTML邮件...
")
.append("点击进入百度
")
//内嵌图片
.append("")
.append("")
.append(" 时间为："+ new Date() +"
");
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Map
Map 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 customerProductList = customerService.selectCustomerProductList();
//根据项目编号去重
List 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("rn");
stringBuilder.append("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！");
stringBuilder.append("");
stringBuilder.append("" +
"客户中文名称 " +
"客户英文名称 " +
"项目名称 " +
"项目编号 " +
// "产品名称 " +
// "产品版本 " +
"查询时间 " +
"维保结束时间 " +
" ");
for (CustomerProductVo vo : newCustomerProductList) {
stringBuilder.append("");
stringBuilder.append("" + vo.getCustomerChName() + " ");
stringBuilder.append("" + vo.getCustomerEnName() + " ");
stringBuilder.append("" + vo.getProjectName() + " ");
stringBuilder.append("" + vo.getProjectCode() + " ");
// stringBuilder.append("" + vo.getProductName() + " ");
// stringBuilder.append("" + vo.getProductVersion() + " ");
stringBuilder.append("" + DateUtils.date2Str(new SimpleDateFormat("yyyy-MM-dd")) + " ");
stringBuilder.append("" + DateUtils.date2Str(vo.getDealine(),new SimpleDateFormat("yyyy-MM-dd")) + " ");
stringBuilder.append("");
}
stringBuilder.append("
");
stringBuilder.append("");
//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()+"---");
