springboot实现qq、163邮箱发送邮件代码（发送附件，多人发送邮件）_springboot 动态群发邮件

1、首先导入所需依赖

 <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-mail</artifactId>
  </dependency>
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2、配置yml文件

spring:
  mail:
    host: smtp.163.com 
    username: 邮箱名
    password: 授权码
    port: 25
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也可以是其他邮箱

spring:
  mail:
    host: smtp.qq.com
    username: 邮箱名
    password: 授权码
    port: 587
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3、授权码获取（以qq和163为例）

qq邮箱：

下滑找到POP3/IMAP/SMTP/Exchange/CardDAV/CalDAV服务，点击开启，根据提示发送短信即可获取

163邮箱：

点击：POP3/SMTP/IMAP，点击开启，根据提示发送短信即可获取

4、主要代码如下

package com.coding.mail.controller;

import io.swagger.annotations.Api;
import io.swagger.annotations.ApiOperation;
import io.swagger.annotations.ApiParam;
import lombok.RequiredArgsConstructor;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.core.io.ByteArrayResource;
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.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RequestPart;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.multipart.MultipartFile;

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

@Slf4j
@Api(tags = "发送邮件")
@RequiredArgsConstructor
@RestController
public class EmailController {

    private final JavaMailSender javaMailSender;

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


    @ApiOperation("多人群发简单邮件")
    @PostMapping("sendSimpleMail")
    public String sendSimpleMail(
            @ApiParam("收件地址") @RequestParam String address,
            @ApiParam("标题") @RequestParam String subject,
            @ApiParam("正文") @RequestParam String body) {
        SimpleMailMessage smm = new SimpleMailMessage();
        smm.setFrom(account);
        // 设置多个收件人
        smm.setTo(address.split(","));
        smm.setSubject(subject);
        smm.setText(body);
        javaMailSender.send(smm);
        return "发送成功";
    }

    @ApiOperation("发送带附件的邮件")
    @PostMapping("sendAttachmentMail")
    public String sendAttachmentMail(
            @ApiParam("收件地址") @RequestParam String address,
            @ApiParam("标题") @RequestParam String subject,
            @ApiParam("正文") @RequestParam String body,
            @ApiParam("附件") @RequestPart MultipartFile file) throws MessagingException, IOException {
        //定制复杂邮件信息MimeMessage
        MimeMessage mimeMailMessage = javaMailSender.createMimeMessage();
        //使用MimeMessageHelper帮助类，并设置multipart多部件使用为true
        MimeMessageHelper mimeMessageHelper = new MimeMessageHelper(mimeMailMessage, true);
        mimeMessageHelper.setFrom(account);
        mimeMessageHelper.setTo(new String[]{address});
        mimeMessageHelper.setSubject(subject);
        mimeMessageHelper.setText(body);
        String fileName= file.getOriginalFilename();
        mimeMessageHelper.addAttachment(fileName, file);
        log.info("fileName:{}", fileName);
        javaMailSender.send(mimeMailMessage);
        return "发送成功";
    }
}
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