1. 邮箱发送

2. 准备工作

3. 整合SpringBoot

3.1 配置

依赖引入

        <!--        邮件服务-->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-mail</artifactId>
        </dependency>

application.yml

spring:
  mail:
    host: smtp.qq.com
    port: 587
    username: QQ邮箱
    password: 授权码
    default-encoding: UTF-8
    properties:
      mail:
        debug: true
        smtp:
          sockFactory:
            class: javax.net.ssl.SSLSocketFactory

其他

邮件对象

package com.ruoyi.common.vo;

import lombok.Data;

/**
 * 邮件对象
 */
@Data
public class MailMessage {
    //发送者
    private String from;
    //接受者
    private String to;
    //抄送人
    private String cc;
    //主题
    private String subject;
    //内容
    private String text;
    //附件
    private MultipartFile file;
}

3.2 发送简单邮件

创建邮箱组件

package com.ruoyi.common.component;

import cn.hutool.core.bean.BeanUtil;
import cn.hutool.core.util.StrUtil;
import com.ruoyi.common.vo.MailMessage;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Bean;
import org.springframework.mail.SimpleMailMessage;
import org.springframework.mail.javamail.JavaMailSender;
import org.springframework.stereotype.Component;

import javax.annotation.Resource;

/**
 * qq邮箱
 */
@Component
public class MailService {
    @Value("${spring.mail.username}")
    private String mailFrom;
    @Resource
    private JavaMailSender javaMailSender;

    /**
     * 发送邮件
     *
     * @param from    发送者
     * @param to      收件人
     * @param cc      抄送人
     * @param subject 主题
     * @param content 内容
     */
    public void sendSimpleMail(String from, String to, String cc, String subject, String content) {
        SimpleMailMessage mailMessage = new SimpleMailMessage();
        mailMessage.setFrom(mailFrom);
        mailMessage.setTo(to);
        mailMessage.setCc(cc);
        mailMessage.setSubject(subject);
        mailMessage.setText(content);
        javaMailSender.send(mailMessage);
    }

    public void sendSimpleMail(MailMessage message) {
        SimpleMailMessage mailMessage = new SimpleMailMessage();
        mailMessage.setFrom(mailFrom);
        String[] tos = StrUtil.splitToArray(message.getTo(), ";");
        mailMessage.setTo(tos);
        String[] ccs = StrUtil.splitToArray(message.getCc(), ";");
        mailMessage.setCc(ccs);
        mailMessage.setSubject(message.getSubject());
        mailMessage.setText(message.getText());
        javaMailSender.send(mailMessage);
    }
}

测试

控制层

    @Resource
    private MailService mailService;

    /**
     * 发送邮件
     *
     * @param user
     * @return
     */
    @GetMapping("/mail")
    public AjaxResult mail(MailMessage mailMessage) {
        mailService.sendSimpleMail(mailMessage);
        return AjaxResult.success();
    }

3.3 发送带附件的邮件

邮箱组件

package com.ruoyi.common.component;

import cn.hutool.core.bean.BeanUtil;
import cn.hutool.core.util.StrUtil;
import com.ruoyi.common.vo.MailMessage;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Bean;
import org.springframework.mail.SimpleMailMessage;
import org.springframework.mail.javamail.JavaMailSender;
import org.springframework.mail.javamail.MimeMessageHelper;
import org.springframework.stereotype.Component;

import javax.annotation.Resource;
import javax.mail.MessagingException;
import javax.mail.internet.MimeMessage;
import java.io.File;

/**
 * qq邮箱
 */
@Component
public class MailService {
    @Value("${spring.mail.username}")
    private String mailFrom;
    @Resource
    private JavaMailSender javaMailSender;

    /**
     * 发送带附件的邮件
     *
     * @param message
     * @param file
     */
    public void sendAttachFileMail(MailMessage message, File file) {
        try {
            MimeMessage mimeMessage = javaMailSender.createMimeMessage();
            MimeMessageHelper mimeMessageHelper = new MimeMessageHelper(mimeMessage, true);
            mimeMessageHelper.setFrom(mailFrom);
            String[] tos = StrUtil.splitToArray(message.getTo(), ";");
            mimeMessageHelper.setTo(tos);
            String[] ccs = StrUtil.splitToArray(message.getCc(), ";");
            mimeMessageHelper.setCc(ccs);
            mimeMessageHelper.setSubject(message.getSubject());
            mimeMessageHelper.setText(message.getText());
            mimeMessageHelper.addAttachment(file.getName(), file);
            javaMailSender.send(mimeMessage);
        } catch (MessagingException e) {
            throw new RuntimeException(e);
        }

    }
}

使用及测试

    @Resource
    private MailService mailService;

    /**
     * 发送邮件带附件
     *
     * @param mailMessage
     * @return
     */
    @PostMapping("/mailFile")
    public AjaxResult mailFile(MailMessage mailMessage, MultipartFile multipartFile) {
        try {
            // 获取文件名
            String fileName = multipartFile.getOriginalFilename();
            // 获取文件后缀(.xml)
            String suffix = fileName.substring(fileName.lastIndexOf("."));
            File file = File.createTempFile(fileName.substring(0, fileName.lastIndexOf(".")), suffix);
            multipartFile.transferTo(file);
            mailService.sendAttachFileMail(mailMessage, file);
        } catch (IOException e) {
            throw new RuntimeException(e);
        }
        return AjaxResult.success();
    }

3.4 发送带图片资源的邮件

组件

package com.ruoyi.common.component;

import cn.hutool.core.bean.BeanUtil;
import cn.hutool.core.util.StrUtil;
import com.ruoyi.common.exception.ServiceException;
import com.ruoyi.common.vo.MailMessage;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Bean;
import org.springframework.core.io.FileSystemResource;
import org.springframework.mail.SimpleMailMessage;
import org.springframework.mail.javamail.JavaMailSender;
import org.springframework.mail.javamail.MimeMessageHelper;
import org.springframework.stereotype.Component;
import org.springframework.web.util.HtmlUtils;

import javax.annotation.Resource;
import javax.mail.MessagingException;
import javax.mail.internet.MimeMessage;
import java.io.File;

/**
 * qq邮箱
 */
@Component
public class MailService {
    @Value("${spring.mail.username}")
    private String mailFrom;
    @Resource
    private JavaMailSender javaMailSender;

    /**
     * 发送正文带图片的邮件
     *
     * @param message
     */
    public void sendMailWithirng(MailMessage message) {
        String[] srcPath = message.getSrcPath().split(",");
        String[] resIds = message.getResIds().split(",");
        if (srcPath.length != resIds.length) {
            throw new ServiceException("图片信息不全,发送失败!");
        }
        try {
            MimeMessage mimeMessage = javaMailSender.createMimeMessage();
            MimeMessageHelper helper = new MimeMessageHelper(mimeMessage, true);
            helper.setFrom(mailFrom);
            String[] tos = StrUtil.splitToArray(message.getTo(), ";");
            helper.setTo(tos);
            String[] ccs = StrUtil.splitToArray(message.getCc(), ";");
            helper.setCc(ccs);
            helper.setSubject(message.getSubject());
            helper.setText(message.getText(), true);
            for (int i = 0; i < srcPath.length; i++) {
                FileSystemResource fileSystemResource = new FileSystemResource(new File(srcPath[i]));
                helper.addInline(resIds[i], fileSystemResource);
            }
            javaMailSender.send(mimeMessage);
        } catch (MessagingException e) {
            throw new RuntimeException(e);
        }

    }
}

测试

    @Resource
    private MailService mailService;

    /**
     * 发送正文带图片的邮件
     *
     * @param mailMessage
     * @return
     */
    @PostMapping("/sendMailWithirng")
    public AjaxResult sendMailWithirng(@Validated @RequestBody MailMessage mailMessage) {
        mailService.sendMailWithirng(mailMessage);
        return AjaxResult.success();
    }

3.5 使用 FreeMarker 构建邮件模报

依赖

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

组件

package com.ruoyi.common.component;

import cn.hutool.core.bean.BeanUtil;
import cn.hutool.core.util.StrUtil;
import com.ruoyi.common.exception.ServiceException;
import com.ruoyi.common.vo.MailMessage;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Bean;
import org.springframework.core.io.FileSystemResource;
import org.springframework.mail.SimpleMailMessage;
import org.springframework.mail.javamail.JavaMailSender;
import org.springframework.mail.javamail.MimeMessageHelper;
import org.springframework.stereotype.Component;
import org.springframework.web.util.HtmlUtils;

import javax.annotation.Resource;
import javax.mail.MessagingException;
import javax.mail.internet.MimeMessage;
import java.io.File;

/**
 * qq邮箱
 */
@Component
public class MailService {
    @Value("${spring.mail.username}")
    private String mailFrom;
    @Resource
    private JavaMailSender javaMailSender;

    /**
     * 使用 FreeMarker 构建邮件模报
     *
     * @param message
     */
    public void sendHtmlMail(MailMessage message) {
        try {
            MimeMessage mimeMessage = javaMailSender.createMimeMessage();
            MimeMessageHelper helper = new MimeMessageHelper(mimeMessage, true);
            helper.setFrom(mailFrom);
            String[] tos = StrUtil.splitToArray(message.getTo(), ";");
            helper.setTo(tos);
            String[] ccs = StrUtil.splitToArray(message.getCc(), ";");
            helper.setCc(ccs);
            helper.setSubject(message.getSubject());
            helper.setText(message.getText(), true);
            javaMailSender.send(mimeMessage);
        } catch (MessagingException e) {
            throw new RuntimeException(e);
        }
    }
}

邮件模板

3.6 使用 Thymeleaf 构建邮件模板

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