Spring-Boot 定时器+发送邮件案例

首先去邮箱开启POP3和IMAP/SMTP获得授权码，避免将密码直接写到配置中

QQ邮箱——设置——账户

pom.xml

		
			org.springframework.boot
			spring-boot-starter
		

		
			org.springframework.boot
			spring-boot-starter-test
			test
		

        
		
			org.springframework.boot
			spring-boot-starter-mail
		
		
			org.springframework
			spring-context-support
			RELEASE
		
		
			com.sun.mail
			javax.mail
			RELEASE
		

	

application.properties配置

spring.mail.host=smtp.qq.com
[email protected](发送者邮箱)
[email protected](发送者邮箱)
spring.mail.password=xxx(从邮箱处获取的授权码)
spring.mail.default-encoding=UTF-8
mail.filePath=‪g:\\364.jpg（发送附件文件的地址,盘符注意小写）

html模板

    
    


    您好,这是验证邮件,请点击下面的链接完成验证,

    激活账号

springboot启动类

加上@EnableScheduling

创建service接口

package com.hxzy.springbootscheduler.service;

public interface MailService {

    /**
     * 发送网页格式
     * @param to
     * @param subject
     * @param content
     */
     void sendHtmlMail(String to, String subject, String content);

    /**
     * 携带附件
     * @param to
     * @param subject
     * @param content
     * @param filePath
     */
     void sendAttachmentsMail(String to, String subject, String content, String filePath);


}

创建service实现类

package com.hxzy.springbootscheduler.service.impl;

import com.hxzy.springbootscheduler.service.MailService;

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.core.io.FileSystemResource;
import org.springframework.mail.javamail.JavaMailSender;
import org.springframework.mail.javamail.MimeMessageHelper;
import org.springframework.stereotype.Component;

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

@Component
public class MailServiceImpl implements MailService{

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

    @Autowired
    private JavaMailSender mailSender;

    @Value("${mail.fromMail.addr}")
    private String from;
//发送网页
    @Override
    public void sendHtmlMail(String to, String subject, String content) {

        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);
            helper.setTo(to);
            helper.setSubject(subject);

            helper.setText(content, true);

            mailSender.send(message);
            logger.info("html邮件发送成功");
        } catch (MessagingException e) {
            logger.error("发送html邮件时发生异常！", e);
        }
    }

//发送附件
    @Override
    public void sendAttachmentsMail(String to, String subject, String content, String filePath) {
        MimeMessage message = mailSender.createMimeMessage();

        try {
            MimeMessageHelper helper = new MimeMessageHelper(message, true);
            helper.setFrom(from);
            helper.setTo(to);
            helper.setSubject(subject);
            helper.setText(content, true);

            FileSystemResource file = new FileSystemResource(new File(filePath));
            String fileName = filePath.substring(filePath.lastIndexOf(File.separator));
            helper.addAttachment(fileName, file);
            //helper.addAttachment("test"+fileName, file);

            mailSender.send(message);
            logger.info("带附件的邮件已经发送。");
        } catch (MessagingException e) {
            logger.error("发送带附件的邮件时发生异常！", e);
        }
    }
}

创建一个定时发送邮箱的类

package com.hxzy.springbootscheduler.task;

import com.hxzy.springbootscheduler.service.MailService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.scheduling.annotation.Scheduled;
import org.springframework.stereotype.Component;

import java.io.BufferedReader;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.time.LocalDateTime;
import java.util.UUID;

@Component
public class Demo01Task {

    @Autowired
    private MailService mailService;

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

    @Scheduled(cron = "30 * * * * ?")
    private void sendMail() throws Exception {
      String info=mailContent();
      String id=UUID.randomUUID().toString();
      String url="http://127.0.0.1:8080/validate/"+id;
      //内容替换
        info=info.replace("{href}",url);
//下面的邮箱地址是接受者的邮箱地址
	//发送不带附件的
       mailService.sendHtmlMail("[email protected]","账户激活操作",info);
       //发送带附件的
       //mailService.sendAttachmentsMail("[email protected]","账户激活操作",info,filePath);

    }

    private String mailContent() throws  Exception {
        String fileAddress=Demo01Task.class.getResource("/mailTemplate.html").getPath();
        File file=new File(fileAddress);
        StringBuffer str=new StringBuffer();
        BufferedReader reader=new BufferedReader(new FileReader(file));
        String  s=null;
        while( (s=reader.readLine())!=null){
             str.append(s);
        }
        reader.close();
        return str.toString();
    }

}