Springboot定时发送邮件，并附带Excel文件和PDF文件

1、导入jar包

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

注意： 先进入QQ邮箱，点击设置，再点击帐户

在帐户中找到POP3/IMAP/SMTP/Exchange/CardDAV/CalDAV服务，开启IMAP/SMTP服务，获取密码

2、配置application.yml

spring: 
 mail:
    #邮箱服务器地址
    host: smtp.qq.com      #QQ邮箱
    username: xxxxxxxxx@qq.com #QQ邮箱
    password: xxxxxxxxxx  #开启邮箱服务的密码
    default-encoding: UTF-8

3、我是把发送、接收和抄送的邮箱都配置在了application.yml，如果你不想配置在yml文件里可以跳过这一步

mail:
  fromMail:
    addr: xxxxxxx@qq.com #发送邮件的邮箱
  toMail:
    to: xxxxxxx@qq.com #接收邮件的邮箱
    ccone: xxxxxxx@hotmail.com #第一个抄送邮箱
    cctwo: xxxxxxxx@gmail.com #第二个抄送邮箱
    bcc: xxxxxxx@qq.com #隐秘抄送邮箱

4、创建发送邮件方法

4.1、MailService

/**
 * @program: 
 * @description: 定时发送邮件Service
 * @author: SaffiChan
 * @create: 2021-04-13 09:16
 **/
public interface MailService {

    void sendHtmlMail(String subject, String content, String filePathExcel, String filePathPdf);

}

4.2、MailServiceImpl

import com.well.supermarket.service.MailService;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.core.io.FileSystemResource;
import org.springframework.mail.javamail.JavaMailSender;
import org.springframework.mail.javamail.MimeMessageHelper;
import org.springframework.stereotype.Component;
import org.springframework.stereotype.Service;
import org.springframework.web.bind.annotation.ResponseBody;

import javax.annotation.Resource;
import javax.mail.MessagingException;
import javax.mail.internet.MimeMessage;
import java.io.*;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLEncoder;
import java.util.regex.Pattern;

/**
 * @program: 
 * @description: 定时发送邮件ServiceImpl
 * @author: SaffiChan
 * @create: 2021-04-13 09:18
 **/

@Component
@Service
public class MailServiceImpl implements MailService {

    private final Logger logger = LoggerFactory.getLogger(this.getClass());

    @Resource
    private JavaMailSender mailSender;

    @Value("${mail.fromMail.addr}")
    private String from;

    @Value("${mail.toMail.to}")
    private String to;

    @Value("${mail.toMail.ccone}")
    private String ccone;

    @Value("${mail.toMail.cctwo}")
    private String cctwo;

    @Value("${mail.toMail.bcc}")
    private String bcc;
/**
     * 发送html邮件
     *
     * @param
     * @param subject
     * @param content
     */
    @Override
    public void sendHtmlMail(String subject, String content, String filePathExcel, String filePathPdf) {
        MimeMessage message = mailSender.createMimeMessage();

        try {
            //true表示需要创建一个multipart message
            MimeMessageHelper helper = new MimeMessageHelper(message, true);
            helper.setFrom(from); //配置在yml文件中的发件人邮箱
            helper.setTo(to);  //配置在yml文件中的收件人邮箱
            String[] cc = {ccone,cctwo}; //将两个抄送邮箱放进String[]中作为一个参数传值
            helper.setCc(cc); //设置抄送人邮箱
            helper.setBcc(bcc);  //设置隐秘抄送人邮箱
            helper.setSubject(subject);  //设置标题
            helper.setText(content, true); //设置邮件内容，并开启H5

            // 判断是否带有Excel附件
            if (filePathExcel != null) {
                FileSystemResource file = new FileSystemResource(new File(filePathExcel));
                String fileName = filePathExcel.substring(filePathExcel.lastIndexOf(File.separator));
                helper.addAttachment(fileName, file);
            }
            // 判断是否带有Pdf附件
            if (filePathPdf != null) {
                FileSystemResource file = new FileSystemResource(new File(filePathPdf));
                String fileName = filePathPdf.substring(filePathPdf.lastIndexOf(File.separator));
                helper.addAttachment(fileName, file);
            }
            mailSender.send(message);
            logger.info("定时报表邮件发送成功");
        } catch (MessagingException e) {
            logger.error("发送定时报表邮件时发生异常！", e);
        }
    }
}

5、创建定时任务

import com.well.supermarket.service.MailService;import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.scheduling.annotation.Scheduled;
import org.springframework.stereotype.Component;

import java.text.SimpleDateFormat;import java.util.Date;/**
 * @program: 
 * @description: 发送邮件定时任务
 * @author: SaffiChan
 * @create: 2021-04-13 09:23
 **/

@Component
public class EmailSchedulerTask {

    @Autowired
    private MailService mailService;
/**
     * 每天凌晨00:02分执行，corn表达式可根据自己需求定义
     */
    @Scheduled(cron="0 02 00 * * ? ")  
    private void processDay() throws Exception {
       
        SimpleDateFormat formatter = new SimpleDateFormat("yyyy-MM-dd");

        String emailContent = formatter.format(new Date())+" 日報表";

        mailService.sendHtmlMail(formatter.format(new Date())+"日報表",emailContent, filePathExcel,filePathPdf);


    }

}