1、設(shè)置系統(tǒng)值

System.setProperty(“mail.mime.splitlongparameters”, “false”);

2、 在創(chuàng)建對(duì)象的時(shí)候定義編碼格式(utf-8)：

MimeMessageHelper helper = new MimeMessageHelper(mes, true, “utf-8”);

3、 其次，在添加附件的時(shí)候，附件名是需要定義編碼的

helper.addAttachment(MimeUtility.encodeWord(附件名,“utf-8”,“B”), 你的附件對(duì)象);
————————————————
版權(quán)聲明：本文為CSDN博主「往事不堪回首…」的原創(chuàng)文章，遵循CC 4.0 BY-SA版權(quán)協(xié)議，轉(zhuǎn)載請(qǐng)附上原文出處鏈接及本聲明。
原文鏈接：https://blog.csdn.net/qq3892997/article/details/126013828

//生成的數(shù)據(jù)通過excel附件的方式，進(jìn)行發(fā)送。
	public void sendMail(String mailFrom, String mailTo, String title, String content, File file) throws Exception {
		System.setProperty("mail.mime.splitlongparameters", "false");//1.設(shè)置系統(tǒng)值 ---處理文件名亂碼
		MimeMessage mimeMessage = mailSender.createMimeMessage();
		MimeMessageHelper msg = new MimeMessageHelper(mimeMessage, true, "utf-8");//2.在創(chuàng)建對(duì)象的時(shí)候定義編碼格式(utf-8)
		msg.addAttachment(MimeUtility.encodeWord(excelName,"utf-8","B"), file); //3.在添加附件的時(shí)候，附件名是需要定義編碼的 ---以上3條都得有，否則文件名亂碼
		msg.setFrom(mailFrom);
		msg.setTo(mailTo);
		msg.setSubject(title);
		msg.setText(content, true);
		mailSender.send(mimeMessage);
	}

工具類

@Component
@Slf4j
/**
 * 發(fā)送郵件工具類
 * @author ZMH
 * @date 7/7/2023 2:03 下午
 */
public class EmailUtils {

    @Autowired
    private JavaMailSender javaMailSender;

    /**
     * 發(fā)送純文本郵件
     * @author ZMH
     * @date 7/7/2023 10:37 上午
     * @param subject 郵件主題
     * @param text 郵件內(nèi)容
     * @param targetEmail 目標(biāo)郵件地址
     * @param sourceEmail 源郵件地址
     * @return void
     */
    public void sendTextEmail (String subject,String text,String targetEmail,String sourceEmail ){
        SimpleMailMessage mailMessage = new SimpleMailMessage();
        mailMessage.setSubject(subject);//主題
        mailMessage.setText(text);//內(nèi)容
        if (StringUtils.isNotBlank(targetEmail) && targetEmail.split(",").length>1){
            mailMessage.setTo(targetEmail.split(","));//多個(gè)號(hào)碼發(fā)送，該發(fā)送會(huì)將目標(biāo)郵件分組發(fā)送
        }else {
            mailMessage.setTo(targetEmail);
        }
        mailMessage.setFrom(sourceEmail);
        javaMailSender.send(mailMessage);
    }


    /**
     * 發(fā)送文本郵件和附件
     * @author ZMH
     * @date 7/7/2023 2:01 下午
     * @param subject 主題
     * @param text 文本內(nèi)容
     * @param targetEmail 目標(biāo)郵件
     * @param sourceEmail 源郵件
     * @param annexList 附件List
     * @param anneNameList 附件名稱List
     * @return void
     */
    public void sendTextAndAnnexEmail(String subject,String text,String targetEmail,String sourceEmail,
                                      String personal, List<File> annexList,List<String> anneNameList ) throws MessagingException {
        sendSeniorEmail(subject,null,false,text,targetEmail,sourceEmail,personal,annexList,anneNameList);
    }




    /**
     * 發(fā)送郵件根據(jù)HTML模本文件
     * @author ZMH
     * @date 7/7/2023 11:16 上午
     * @param subject 主題
     * @param content 內(nèi)容
     * @param targetEmail 目標(biāo)郵件
     * @param sourceEmail 源郵件
     * @return void
     */
    public void sendHTMLEmail(String subject,String content,String targetEmail,String sourceEmail,String personal) throws MessagingException {
        sendSeniorEmail(subject,content,true,"",targetEmail,sourceEmail,personal,null,null);
    }

    /**
     * 發(fā)送模版文件并包含附件
     * @author ZMH
     * @date 7/7/2023 11:20 上午
     * @param subject 主題
     * @param content 內(nèi)容
     * @param targetEmail 目標(biāo)郵件
     * @param sourceEmail 源郵件
     * @param annexList 附件
     * @param annexNameList 附件名稱
     * @return void
     */
    public void sendHTMLAndAnnexEmail(String subject,String content,String targetEmail,
                              String sourceEmail,String personal,List<File> annexList,List<String> annexNameList) throws MessagingException {
        sendSeniorEmail(subject,content,true,"",targetEmail,sourceEmail,personal,annexList,annexNameList);
    }



    /**
     * 發(fā)送高級(jí)郵件
     * @author ZMH
     * @date 7/7/2023 11:26 上午
     * @param subject 主題
     * @param concent content
     * @param targetEmail 目標(biāo)郵箱
     * @param sourceEmail 源郵箱
     * @param annexList 附件
     * @param annexNameList 附件名稱
     * @return void
     */
    private void sendSeniorEmail(String subject, String concent, Boolean isHtml, String txet, String targetEmail,
                                 String sourceEmail,String personal, List<File> annexList, List<String> annexNameList) throws MessagingException{
        System.setProperty("mail.mime.splitlongparameters", "false");//1.設(shè)置系統(tǒng)值 ---處理文件名亂碼
        MimeMessage message = javaMailSender.createMimeMessage();
        MimeMessageHelper helper = new MimeMessageHelper(message,true,"utf-8");
        helper.setSubject(subject);//郵件主題
        try {
            helper.setFrom(sourceEmail,personal);
        } catch (UnsupportedEncodingException e) {
            e.printStackTrace();
        }
        if (StringUtils.isNotBlank(targetEmail) && targetEmail.split(",").length>1){
            helper.setTo(targetEmail.split(","));//多個(gè)號(hào)碼發(fā)送，該發(fā)送為分組發(fā)送
        }else {
            helper.setTo(targetEmail);
        }
        if (isHtml) {
            //String absolutePath = htmlFile.getAbsolutePath();
            //String htmlModel = FileUtil.getStringByFile(absolutePath);
             concent = "<!DOCTYPE html>\n" +
                    "<html lang=\"en\">\n" +
                    "<head>\n" +
                    "    <meta charset=\"UTF-8\">\n" +
                    "    <meta name=\"viewport\" content=\"width=device-width, initial-scale=1.0\">\n" +
                    "    <title></title>\n" +
                    "</head>\n" +
                    "<body>\n" +
                    "  <div>" + concent + "</div>\n" +
                    "</body>\n" +
                    "</html>";
            helper.setText(concent,true);
        }else {
            helper.setText(txet,false);
        }
        helper.setSentDate(new Date());//郵件發(fā)送時(shí)間
        if (!CollectionUtils.isEmpty(annexList)){
            if (CollectionUtils.isEmpty(annexNameList)){
                for (File file : annexList) {
                    annexNameList.add(file.getName());
                }
            }else {
                if (annexList.size()!= annexNameList.size()){
                    throw new MessagingException("附件名稱和附件條次不一致");
                }
            }
            try {
                for (int i = 0; i < annexList.size(); i++) {
                    helper.addAttachment(MimeUtility.encodeWord(annexNameList.get(i), "utf-8", "B"), annexList.get(i));
                }
            } catch (UnsupportedEncodingException e) {
                e.printStackTrace();
            }
        }
        javaMailSender.send(message);
    }


}

yml配置文件增加

spring:
  mail:
    username: 郵箱號(hào)碼
    password: 授權(quán)碼
    host: smtp.qq.com
    port: 465
    properties:
      mail:
        smtp:
          auth: true
          socketFactory:
            class: javax.net.ssl.SSLSocketFactory
          starttls:
            enable: true
          ssl:
            enable: true

pom.xml 增加文章來源地址http://www.zghlxwxcb.cn/news/detail-615687.html

	  <!-- SpringEmail -->
	  <dependency>
		  <groupId>org.springframework.boot</groupId>
		  <artifactId>spring-boot-starter-mail</artifactId>
	  </dependency>

到了這里，關(guān)于springboot 發(fā)送郵件，以及郵件工具類 并且解決spring-boot-starter-mail 發(fā)送郵件附件亂碼或者文件錯(cuò)亂的文章就介紹完了。如果您還想了解更多內(nèi)容，請(qǐng)?jiān)谟疑辖撬阉鱐OY模板網(wǎng)以前的文章或繼續(xù)瀏覽下面的相關(guān)文章，希望大家以后多多支持TOY模板網(wǎng)！