本文参考spring官网email接口文档所写。

spring-email官方网址：https://docs.spring.io/spring/docs/5.1.8.RELEASE/spring-framework-reference/integration.html#mail

1：相关依赖

        
        
            org.springframework.boot
            spring-boot-starter-mail
            2.1.6.RELEASE
        

2：邮箱收件人

public class EmailModel implements Serializable {

    /**
     * 收件人姓名
     **/
    private String recieverName;

    /**
     * 收件人邮箱地址
     **/
    private String recieverEmailAddress;

    /**
     * 邮件主题
     **/
    private String emailTheme;

    /**
     * 邮件内容
     **/
    private String emailContent;

    public String getRecieverName() {
        return recieverName;
    }

    public void setRecieverName(String recieverName) {
        this.recieverName = recieverName;
    }

    public String getRecieverEmailAddress() {
        return recieverEmailAddress;
    }

    public void setRecieverEmailAddress(String recieverEmailAddress) {
        this.recieverEmailAddress = recieverEmailAddress;
    }

    public String getEmailTheme() {
        return emailTheme;
    }

    public void setEmailTheme(String emailTheme) {
        this.emailTheme = emailTheme;
    }

    public String getEmailContent() {
        return emailContent;
    }

    public void setEmailContent(String emailContent) {
        this.emailContent = emailContent;
    }
}

3：邮箱工具类

package com.dev.utils.email;

import com.dev.model.email.EmailModel;
import org.jetbrains.annotations.NotNull;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.mail.MailException;
import org.springframework.mail.javamail.JavaMailSender;
import org.springframework.mail.javamail.JavaMailSenderImpl;
import org.springframework.mail.javamail.MimeMessageHelper;
import org.springframework.mail.javamail.MimeMessagePreparator;

import javax.mail.Message;
import javax.mail.MessagingException;
import javax.mail.internet.MimeMessage;
import java.time.LocalDateTime;
import java.time.format.DateTimeFormatter;

/**
 * Created on 2019-08-02 16:06.
 *
 * @author zgq7
 */
public class MailSendUtils {

    private static final Logger logger = LoggerFactory.getLogger(MailSendUtils.class);

    /**
     * 发送者地址
     **/
    private static String posterAdress = "xxx@qq.com";

    /**
     * 发送者姓名
     **/
    private static final String posterName = "xxx";

    @Autowired
    private JavaMailSender javaMailSender;

    @Autowired
    private JavaMailSenderImpl javaMailSenderImpl;

    /**
     * 文本发送
     **/
    public void sendEmailAsText(final EmailModel emailModel) {
        MimeMessagePreparator mimeMessagePreparator = mimeMessage -> {
            mimeMessage.setFrom(posterAdress);
            mimeMessage.setRecipients(Message.RecipientType.TO, emailModel.getRecieverEmailAddress());
            mimeMessage.setText(""
                    + "hello：" + emailModel.getRecieverName()
                    + "
" + "msg：" + emailModel.getEmailContent()
                    + "
" + "from :" + posterName
                    + "");
        };
        try {
            this.javaMailSender.send(mimeMessagePreparator);
            logger.info("邮箱已返送至[{}]邮箱！", emailModel.getRecieverName());
        } catch (MailException e) {
            logger.error("邮箱异常：{}", e);
        }
    }

    /**
     * html 网页发送
     * 该方法为同步方法
     **/
    public void sendEmailAsSysExceptionHtml(final EmailModel emailModel) {
        MimeMessage mimeMessage = javaMailSenderImpl.createMimeMessage();
        MimeMessageHelper mimeMessageHelper;
        try {
            mimeMessageHelper = new MimeMessageHelper(mimeMessage, true);
            mimeMessageHelper.setFrom(posterAdress);
            mimeMessageHelper.setTo(emailModel.getRecieverEmailAddress());
            mimeMessageHelper.setText("\n" +
                            "\n" +
                            "\t\n" +
                            "\t\t\n" +
                            "\t\t\n" +
                            "\t\n" +
                            "\t\n" +
                            "\n" +
                            "\t\n" +
                            "\t\t\n" +
                            "\t\t\t\n" +
                            "\t\t\t\t\n" +
                            "\t\t\t\t\t\n" +
                            "\t\t\t\t\t\n" +
                            "\t\t\t\t\n" +
                            "\t\t\t\t\n" +
                            "\t\t\t\t\t\n" +
                            "\t\t\t\t\t\n" +
                            "\t\t\t\t\n" +
                            "\t\t\t\t\n" +
                            "\t\t\t\t\t\n" +
                            "\t\t\t\t\t\n" +
                            "\t\t\t\t\n" +
                            "\t\t\t\n" +
                            "\t\t
时间
" + LocalDateTime.now().format(DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss")) + "
信息
" + "测试" + "
堆栈
" + emailModel.getEmailContent() + "
\n" +
                            "\t\n" +
                            "\n" +
                            ""
                    , true);

            this.javaMailSender.send(mimeMessage);
            logger.info("邮箱已返送至[{}]邮箱！", emailModel.getRecieverName());

        } catch (MessagingException e) {
            e.printStackTrace();
        } catch (MailException e) {
            logger.error("邮箱异常：{}", e);
        }
    }

}

notice3.1:可自行设置文本发送api、html发送api、图片发送api等。

我的工具类中只写了文本发送和html发送两种格式的api。

4：EmailUtils Bean

因为我们是整合springBoot的，因此我们需要向spring容器注入这个Bean，（因为默认单例）。

@Configuration
public class BeanRegistryCenterConfig {

　　  /**
     * 邮箱工具类 bean 注册
     **/
    @Bean
    public MailSendUtils mailSendUtils() {
        return new MailSendUtils();
    }

}

5：Application.properties

spring.mail.host=smtp.qq.com
spring.mail.port=587
spring.mail.username=你的qq@qq.com
spring.mail.password=xxxxx                  
spring.mail.protocol=smtp
spring.mail.default-encoding=UTF-8

spring.mail.usernam：是你的qq邮箱地址

spring.mail.password：不要用真正的qq邮箱密码，而是qq邮箱第三方服务授权码

6：获取邮箱第三方服务授权码

①：登录qq邮箱，进入首页，点击设置按钮

 ②：点击账户设置

　　 并拉到最下面点击我圈中的开启按钮

　　然后会弹出一个小框提示你发信息，发就行了，发送之后点击验证会收到授权码

　　除了spring.mail.username、spring.mail.password 两项要换成自己的 ，其他的和我一样就行；

7：测试

7.1：文本格式邮件

    /**
     * Java Mail 文本发送
     **/
    @Test
    public void EmaiTest() {
        EmailModel emailModel = new EmailModel();
        emailModel.setEmailTheme("测试");
        emailModel.setRecieverName("测试");
        emailModel.setEmailContent("测试");
        emailModel.setRecieverEmailAddress("xxx@qq.com");

        mailSendUtils.sendEmailAsText(emailModel);
    }

控制台：

目标邮箱收到的邮件：

7.2：html格式邮件

    /**
     * Java Mail 网页发送
     **/
    @Test
    public void EmailTest2() throws MessagingException, InterruptedException {
        EmailModel emailModel = new EmailModel();
        emailModel.setEmailTheme("测试");
        emailModel.setRecieverName("测试");
        emailModel.setEmailContent("测试");
        emailModel.setRecieverEmailAddress("xxx@qq.com");

        mailSendUtils.sendEmailAsSysExceptionHtml(emailModel);

    }

目标邮箱收到的邮件：

　　这个展示效果可以自己设置。

8：注意点

发送邮件者的邮箱地址为qq邮箱，否则会QQ邮箱认证报错。而接收者邮箱可以为其他的邮箱，如企业邮箱、网易邮箱等。

记录同学的问题：

①：如何同时发送邮件给多个邮箱？

回：获取接收者的邮箱，放到一个集合，然后调用封装的api逐个发送。也可以考虑多线程处理，这样会比较快。

②：接收者邮箱需要按平台分开发送吗？

回：不需要，只要接收者的邮箱正确，直接发送就行，我们只需要配置发件人的邮箱。毕竟你不用JavaMail，打开你的邮箱APP，编写好邮件直接发送就行了，不用在乎接收者的邮箱平台。