前几天,需要做一个功能就是客户使用我们公司的设备的时候 ,每天固定一个时间点 ,我们定时发送该设备的数据到客户邮箱,让客户了解自己设备的一个情况,由于代码不能上传,就把当时我开始搭建开发而写的一个demo记录下来,实现的原理是一样的,非常之简单.

一.创建一个springboot的项目

项目结构图:

首先,我们先测试邮件发送

controller层

package com.csq.study.controller;


import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.bind.annotation.RestController;
import org.thymeleaf.TemplateEngine;
import com.csq.study.service.SendMailService;
import com.sun.xml.internal.messaging.saaj.packaging.mime.MessagingException;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.thymeleaf.context.Context;

import java.io.File;
import java.util.ArrayList;

@RestController
public class SendMailController {
    @Autowired
    private SendMailService sendMailService;

    @Autowired
    private TemplateEngine templateEngine;

    @RequestMapping(value = "/sendOne",method = RequestMethod.GET)
    public String sendOne() throws MessagingException {
        //简单邮件
        //测试企业邮箱
        sendMailService.sendTxtMail1("*******@163.com","简单的文字介绍","我是一封简单的测试邮件");
        return "sendOne发送成功";
    }
    @RequestMapping(value = "/sendTwo",method = RequestMethod.GET)
    @ResponseBody
    public String sendTwo() throws MessagingException {
        //模板邮件
        //测试163邮箱
        Context ct = new Context();
        ct.setVariable("username","我是程小清呀!");
        sendMailService.sendTxtMail2("******@163.com","附带标题内容等邮件",templateEngine.process("mail01",ct));
        return "sendTwo发送成功";
    }
    @RequestMapping(value ="/sendThree",method = RequestMethod.GET)
    public String sendThree() throws MessagingException {
        //模板邮件，带附件
        Context ct = new Context();
        ct.setVariable("username", "我是程小清呀!（附带两首诗歌）");
        ArrayList<File> files = new ArrayList<>();
        File file = new File("/Users/csq/Desktop/mail.txt");
        boolean exists = file.exists();
        if (exists) {
            files.add(file);
            sendMailService.sendTxtMail3("******@163.com", "带有附件的测试邮件", templateEngine.process("mail02", ct), files);
            return "sendThree发送成功";
        }
        return "sendThree发送失败";
     }

}

service层

package com.csq.study.service;

import java.io.File;
import java.util.List;

public interface SendMailService {

     void sendTxtMail1(String accept, String topic, String content) ;

     void sendTxtMail2(String accept, String topic, String content) ;

     void sendTxtMail3(String accept, String topic, String content, List<File> files) ;

}

实现类

package com.csq.study.service;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
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.Service;

import javax.mail.internet.MimeMessage;
import java.io.File;
import java.util.List;


@Service
public class SendMailServiceImpl implements SendMailService {

    @Autowired
    private JavaMailSender javaMailSender;

    /**
     * 邮件的发送方
     */
    @Value("${spring.mail.username}")
    private String sendFrom;


    @Override
    public void sendTxtMail1(String accept, String topic, String content) {
        SimpleMailMessage message = new SimpleMailMessage();
        message.setFrom(sendFrom);
        message.setTo(accept);
        message.setSubject(topic);
        message.setText(content);
        javaMailSender.send(message);
    }

    @Override
    public void sendTxtMail2(String accept, String topic, String content) {
// TODO Auto-generated method stub
        MimeMessage message = javaMailSender.createMimeMessage();
        //true表示需要创建一个multipart message
        try {
            MimeMessageHelper helper = new MimeMessageHelper(message, true);
            helper.setFrom(sendFrom);
            helper.setTo(accept);
            helper.setSubject(topic);
            helper.setText(content, true);
            javaMailSender.send(message);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    @Override
    public void sendTxtMail3(String accept, String topic, String content, List<File> files) {
        try {
            MimeMessage message = javaMailSender.createMimeMessage();
            MimeMessageHelper mh = new MimeMessageHelper(message, true);
            mh.setFrom(sendFrom);
            mh.setTo(accept);
            mh.setSubject(topic);
            mh.setText(content, true);
            //添加附件
            for (File file : files) {
                mh.addAttachment(file.getName(), new FileSystemResource(file));
            }
            javaMailSender.send(message);
        } catch (Exception e) {
         e.printStackTrace();
        }

    }
}

application.properties

#设置服务端口
server.port=9800
# Email配置属性
spring.mail.default-encoding=UTF-8
spring.mail.host=smtp.qq.com
spring.mail.username=***@qq.com
#切记此处需要开启pom3的时候的验证码不是邮箱的密码
spring.mail.password= 你的验证码
spring.mail.properties.mail.smtp.auth=true
spring.mail.properties.mail.smtp.starttls.enable=true
spring.mail.properties.mail.smtp.starttls.required=true

mail01

<!DOCTYPE html>
<html xmlns:th="http://www.thymeleaf.org">
<head>
    <meta charset="UTF-8"/>
    <title>邮件格式</title>
</head>
<body>
<h3><span th:text="${username}"></span>，你好！</h3>
<p style="color: red;">这是一封测试邮件。</p>
</body>
</html>

mail02

<!DOCTYPE html>
<html xmlns:th="http://www.thymeleaf.org">
<head>
    <meta charset="UTF-8"/>
    <title>测试邮件2</title>
</head>
<body>
<h3><span th:text="${username}"></span>，你好！</h3>
<p>这是一封含有附件的邮件，请查收！</p>
</body>
</html>

启动项目访问:

去查我们的邮箱是否有新邮件

含附件的邮件

可以看到已经收到邮件.这就说明邮件发送功能是通的 ,那么我们稍加改动就可以做一个定时发送

新增一个类

SendMailTask

package com.csq.study.task;


import com.csq.study.service.SendMailService;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.scheduling.annotation.Scheduled;
import org.springframework.stereotype.Component;
import org.thymeleaf.TemplateEngine;
import org.thymeleaf.context.Context;

import java.io.File;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Date;


@Component
public class SendMailTask {

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

    @Autowired
    private SendMailService sendMailService;

    @Autowired
    private TemplateEngine templateEngine;
    SimpleDateFormat sf = new SimpleDateFormat("yyyy-MM-dd:hh:mm:ss");
//
//    @Scheduled(cron = "*/59 * * * * ?")
//    public String SendMail() {
//        logger.info("定时发送短信在" + sf.format(new Date()) + "被触发-->");
//        sendMailService.sendTxtMail1("****[email protected]", "简单的文字介绍", "我是一封简单的测试邮件");
//        return "SendMail发送成功";
//
//    }

   @Scheduled(cron = "*/30 * * * * ?")
    public String SendMail01() {
        logger.info("定时发送邮件在" + sf.format(new Date()) + "被触发-->");
        //模板邮件，带附件
        Context ct = new Context();
        ct.setVariable("username", "我是程小清呀!（附带两首诗歌）");
        ArrayList<File> files = new ArrayList<>();
        File file = new File("/Users/csq/Desktop/mail.txt");
        boolean exists = file.exists();
        if (exists) {
            files.add(file);
            sendMailService.sendTxtMail3("*******@163.com", "带有附件的测试邮件", templateEngine.process("mail02", ct), files);
            return "sendThree发送成功";
        }
        return "sendThree发送失败";
    }
}

切记,在启动类上添加@EnableScheduling注解

这样我们在启动项目,就可以看到我们的定时任务触发了

查看控制台:

再去看邮箱

有两封下午3点28发送的,到此,功能完成,非常简单!!

温馨提示:由于我在做测试时候想要快速查看定时发送功能是否好使,改成每5秒发送一次,结果,被腾讯检测出来有攻击邮箱行为,然后被限制发送,所以这个注意一点...

java实现定时发送邮件

首先,我们先测试邮件发送

SendMailTask

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