前言

在许多企业级项目中,需要用到邮件发送的功能,如:

  1. 注册用户时需要邮箱发送验证
  2. 用户生日时发送邮件通知祝贺
  3. 发送邮件给用户等

    创建工程导入依赖
<!-- 邮箱发送依赖 -->
<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-mail</artifactId>
</dependency>
<!-- 小火龙代码简化 -->
<dependency>
    <groupId>org.projectlombok</groupId>
        <artifactId>lombok</artifactId>
    <version>1.18.8</version>
</dependency>

本工程依赖于SpringBoot,是基于SpringBoot再次对邮箱发送进行了一次封装。

创建Application.properties
# JavaMailSender 邮件发送的配置
spring.mail.host=smtp.qq.com
[email protected]
#授权码
spring.mail.password=
spring.mail.properties.mail.smtp.auth=true
spring.mail.properties.mail.smtp.starttls.enable=true
spring.mail.properties.mail.smtp.starttls.required=true
spring.mail.default-encoding=UTF-8
封装邮箱发送工具类

创建邮箱信息实体类,如下:

/**
 * 邮件信息实体
 *
 * @author:伍梓涛
 * @version:1.0.0
 * @Modified By:SimpleWu
 * @CopyRright (c)2019-:YUM架构平台
 */
@Data
public class MailEntity {
    private String to; //收件人
    private String subject;//标题
    private String text;//正文
    private boolean isHtml = false;//是否html邮件
    private List<String> files;//附件地址
    private Date sentDate;//发送时间

}

创建邮箱信息实体类工具,快捷创建邮件信息

/**
 * 邮箱发送信息统一处理封装
 *
 * @author:伍梓涛
 * @version:1.0.0
 * @Modified By:SimpleWu
 * @CopyRright (c)2019-:YUM架构平台
 */
@Slf4j
public class MailEntityHelper {


    public static MimeMessageHelper craeteMessageHelper(MimeMessage mimeMessage, MailEntity mailBean) throws MessagingException {

        MimeMessageHelper mimeMessageHelper = new MimeMessageHelper(mimeMessage, true);
        // mimeMessageHelper.setFrom(emailSender);//发件人
        mimeMessageHelper.setTo(mailBean.getTo());//收件人
        mimeMessageHelper.setSubject(mailBean.getSubject());//标题
        mimeMessageHelper.setText(mailBean.getText(), mailBean.isHtml());//是否html
        mimeMessageHelper.setSentDate(mailBean.getSentDate() == null ? new Date() : mailBean.getSentDate());// 客户端邮箱发送时间
        if (mailBean.getFiles() != null && mailBean.getFiles().size() > 0) {
            //附件添加
            mailBean.getFiles().forEach(filename -> {
                String ext = filename.substring(filename.lastIndexOf(".") + 1, filename.length());
                File diskfile = new File(filename);
                try {
                    mimeMessageHelper.addAttachment(diskfile.getName(), diskfile);
                } catch (MessagingException e) {
                    e.printStackTrace();
                    log.error("设置附件失败:{}", mailBean);
                }
            });
        }
        return mimeMessageHelper;
    }

}

创建邮箱发送工具类,进行邮箱发送:


/**
 * 邮箱发送工具类
 *
 * @author:伍梓涛
 * @version:1.0.0
 * @Modified By:SimpleWu
 * @CopyRright (c)2019-:YUM架构平台
 */
@Component
@Slf4j
public class MailHelper {


    @Autowired
    private JavaMailSender javaMailSender;

    @Value("${spring.mail.username}")
    private String emailSender;

    private static MailHelper mailHelper;

    public MailHelper() {
        mailHelper = this;
    }

    /**
     * 构建静态获取实例
     *
     * @return
     */
    public static MailHelper buidler() {
        if (mailHelper == null) {
            return null;
        }
        return mailHelper;
    }

    /*public void sendSimpleMail(EmailContextPojo mailBean) {
        try {
            SimpleMailMessage simpleMailMessage = new SimpleMailMessage();
            //邮件发送人
            simpleMailMessage.setFrom(emailSender);
            //邮件接收人
            simpleMailMessage.setTo(mailBean.getTo());
            //邮件主题
            simpleMailMessage.setSubject(mailBean.getSubject());
            //邮件内容
            simpleMailMessage.setText(mailBean.getText());
            javaMailSender.send(simpleMailMessage);
        } catch (Exception e) {
            e.printStackTrace();
            log.error("邮件发送失败", e.getMessage());
        }
    }*/


    public void sendMail(MailEntity mailBean) {
        MimeMessage mimeMailMessage = null;
        try {
            mimeMailMessage = javaMailSender.createMimeMessage();
            MimeMessageHelper mimeMessageHelper = MailEntityHelper.craeteMessageHelper(mimeMailMessage, mailBean);
            mimeMessageHelper.setFrom(emailSender);//发件人
            javaMailSender.send(mimeMailMessage);
        } catch (Exception e) {
            log.error("邮件发送失败", e.getMessage());
        }
    }


    public void sendMail(MailEntity... mailBeans) {
        //批量发送集合
        List<MimeMessage> mimeMessages = new ArrayList<>(mailBeans.length);
        try {
            if (mailBeans != null || mailBeans.length > 0) {
                for (int i = 0; i < mailBeans.length; i++) {
                    MimeMessage mimeMailMessage = javaMailSender.createMimeMessage();
                    MimeMessageHelper messageHelper = MailEntityHelper.craeteMessageHelper(mimeMailMessage, mailBeans[i]);
                    messageHelper.setFrom(emailSender);//发件人
                    mimeMessages.add(mimeMailMessage);
                }
            }

            MimeMessage[] resultMessage = new MimeMessage[mimeMessages.size()];
            mimeMessages.toArray(resultMessage);
            javaMailSender.send((resultMessage));
        } catch (Exception e) {
            log.error("邮件发送失败", e.getMessage());
        }
    }


}

在之前通过邮箱发送信息统一处理的工具类,对邮件信息实体进行封装后,这里就只需要传入对象参数即可。由于在这里使用的是SpringBoot已经封装好的,由于我们要把它当成工具类使用,每次需要注入并不方便。
所在在类中加了个静态对象,在Spring 容器实例化的时候给他初始化直接赋值给javaMailSender并且通过buidler()可以静态获取到实例对象,但是这样如果被重新创建对象后就会产生问题,所以最好在工具类中使用Spring 容器去获取 javaMailSender即可 。

发送邮件

1.发送普通邮件

 MailEntity emailContextPojo = new MailEntity();
 emailContextPojo.setSubject("Ycloud 邮箱标题");
 emailContextPojo.setText("Ycloud 邮箱正文");
 emailContextPojo.setTo(" 接收邮箱号 ");
 MailHelper.buidler().sendMail(emailContextPojo);

2.发送Html邮件

 emailContextPojo.setHtml(true);

只需要将信息实体类设置成true即可。
3.发送附件

emailContextPojo.setFiles(Arrays.asList("D:\\Yum系统架构平台\\004.高系统部署\\004.PXC\\部署手册.docx"));

只需要增加附件路径即可。
注: 请勿直接在项目中使用邮箱发送
可参考JOB实现定时发送邮件:https://www.cnblogs.com/SimpleWu/p/11341453.html
本文代码案例:https://github.com/450255266/open-doubi/tree/master/SpringBoot/email

08-24 06:30