Java SpringBoot实现邮件发送

亦凉 2023-10-09 23:24 44阅读 0赞

## 依赖 ##

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

## 邮件模板 ##

<!DOCTYPE html>
    <html lang="zh" xmlns:th="http://www.thymeleaf.org">
    <head>
        <meta charset="UTF-8">
        <title>邮件</title>
        <style>
            table {
                border: 3px solid black;
                border-spacing: 0;
                border-collapse: collapse;
            }
    
            td {
                border: 3px solid black;
                padding: 10px;
                text-align: center;
            }
        </style>
    </head>
    <body>
    <div style="font-size: 24px">
        <div style="border-bottom: 3px solid #eee; margin-bottom: 15px">[[${email.date}]] 农安试验场原始数据上传情况</div>
    
        <table>
            <tr style="font-weight: bold">
                <td>TEVG System</td>
                <td>空间总数据量 Summe：[[${email.amount}]]</td>
                <td colspan="3">[[${email.date}]]</td>
            </tr>
            <tr style="font-weight: bold">
                <td>VDS Nr.</td>
                <td>日期Date-时间Time</td>
                <td>文件夹大小 Size/M</td>
                <td>迁移状态 Upload Status</td>
            </tr>
            <tr th:each="data:${email.list}">
                <td><a th:href="${data.codeUrl}">[[${data.code}]]</a></td>
                <td><a th:href="${data.dateUrl}">[[${data.date}]]</a></td>
                <td>[[${data.folderSize}]]</td>
                <td>[[${data.migrations}]]</td>
            </tr>
    
        </table>
    </div>
    </body>
    </html>

## 邮件接口 ##

public interface SmtpMailService {
        /**
         * 发送文本邮件
         *
         * @param to      收件人地址
         * @param subject 邮件主题
         * @param content 邮件内容
         * @param cc      抄送地址
         */
        void sendSimpleMail(List<String> to, String subject, String content, List<String> cc);
    
        /**
         * 发送HTML邮件
         *
         * @param to      收件人地址
         * @param subject 邮件主题
         * @param content 邮件内容
         * @param cc      抄送地址
         * @throws MessagingException 邮件发送异常
         */
        void sendHtmlMail(List<String> to, String subject, String content, List<String> cc);
    
        /**
         * 发送带附件的邮件
         *
         * @param to       收件人地址
         * @param subject  邮件主题
         * @param content  邮件内容
         * @param filePath 附件地址
         * @param cc       抄送地址
         * @throws MessagingException 邮件发送异常
         */
        void sendAttachmentsMail(List<String> to, String subject, String content, List<String> filePath, List<String> cc);
    
        /**
         * 发送正文中有静态资源的邮件
         *
         * @param to      收件人地址
         * @param subject 邮件主题
         * @param content 邮件内容
         * @param rscPath 静态资源地址
         * @param rscId   静态资源id
         * @param cc      抄送地址
         * @throws MessagingException 邮件发送异常
         */
        void sendResourceMail(List<String> to, String subject, String content, String rscPath, String rscId, List<String> cc);

## 邮件接口实现 ##

@Service
    public class SmtpMailServiceImpl implements SmtpMailService {
    
        @Autowired
        private IVwEmailServerService vwEmailServerService;
    
        private String from;
    
        /**
         * 发送文本邮件
         *
         * @param to      收件人地址
         * @param subject 邮件主题
         * @param content 邮件内容
         * @param cc      抄送地址
         */
        @Override
        public void sendSimpleMail(List<String> to, String subject, String content, List<String> cc) {
            JavaMailSenderImpl jms = getMailSender();
            MimeMessage mimeMessage = jms.createMimeMessage();
            MimeMessageHelper helper;
    
            try {
                helper = new MimeMessageHelper(mimeMessage, true);
                for (String addressee : to) {
                    helper.setFrom(from);
                    helper.setTo(addressee);
                    helper.setSubject(subject);
                    helper.setText(content);
                    if (!cc.isEmpty()) {
                        helper.setCc(cc.toString());
                    }
                    jms.send(mimeMessage);
                }
            } catch (MessagingException e) {
                System.out.println(e);
            }
    
    
        }
    
        /**
         * 发送HTML邮件
         *
         * @param to      收件人地址
         * @param subject 邮件主题
         * @param content 邮件内容
         * @param cc      抄送地址
         */
        @Override
        public void sendHtmlMail(List<String> to, String subject, String content, List<String> cc) {
            JavaMailSenderImpl jms = getMailSender();
            MimeMessage mimeMessage = jms.createMimeMessage();
            MimeMessageHelper helper;
    
            try {
                helper = new MimeMessageHelper(mimeMessage, true);
                for (String addressee : to) {
                    helper.setFrom(from);
                    helper.setTo(addressee);
                    helper.setSubject(subject);
                    helper.setText(content, true);
                    if (!cc.isEmpty()) {
                        String[] sup = cc.toArray(new String[cc.size()]);
                        helper.setCc(sup);
                    }
                    jms.send(mimeMessage);
                }
            } catch (MessagingException e) {
                System.out.println(e);
            }
    
    
        }
    
        /**
         * 发送带附件的邮件
         *
         * @param to       收件人地址
         * @param subject  邮件主题
         * @param content  邮件内容
         * @param filePath 附件地址
         * @param cc       抄送地址
         */
        @Override
        public void sendAttachmentsMail(List<String> to, String subject, String content, List<String> filePath, List<String> cc) {
            JavaMailSenderImpl jms = getMailSender();
            MimeMessage mimeMessage = jms.createMimeMessage();
            MimeMessageHelper helper;
    
            try {
                helper = new MimeMessageHelper(mimeMessage, true);
                for (String address : to) {
                    helper.setFrom(from);
                    helper.setTo(address);
                    helper.setSubject(subject);
                    helper.setText(content, true);
                    if (!cc.isEmpty()) {
                        helper.setCc(cc.toString());
                    }
                    for (String attachment : filePath) {
                        FileSystemResource file = new FileSystemResource(new File(attachment));
                        String fileName = attachment.substring(filePath.lastIndexOf(File.separator));
                        helper.addAttachment(fileName, file);
                    }
    
                    jms.send(mimeMessage);
                }
            } catch (MessagingException e) {
                System.out.println(e);
            }
    
    
        }
    
        /**
         * 发送正文中有静态资源的邮件
         *
         * @param to      收件人地址
         * @param subject 邮件主题
         * @param content 邮件内容
         * @param rscPath 静态资源地址
         * @param rscId   静态资源id
         * @param cc      抄送地址
         */
        @Override
        public void sendResourceMail(List<String> to, String subject, String content, String rscPath, String rscId, List<String> cc) {
            JavaMailSenderImpl jms = getMailSender();
            MimeMessage mimeMessage = jms.createMimeMessage();
            MimeMessageHelper helper;
            try {
                helper = new MimeMessageHelper(mimeMessage, true);
                for (String address : to) {
    
                    helper.setFrom(from);
                    helper.setTo(address);
                    helper.setSubject(subject);
                    helper.setText(content, true);
                    if (!cc.isEmpty()) {
                        helper.setCc(cc.toString());
                    }
                    FileSystemResource res = new FileSystemResource(new File(rscPath));
                    helper.addInline(rscId, res);
    
                    jms.send(mimeMessage);
                }
            } catch (MessagingException e) {
                System.out.println(e);
            }
    
    
        }
    
        public JavaMailSenderImpl getMailSender() {
            List<VwEmailServer> list = vwEmailServerService.selectVwEmailServerList(new VwEmailServer());
            VwEmailServer emailServer = list.get(0);
    
            JavaMailSenderImpl jms = new JavaMailSenderImpl();
            //邮件服务器主机
            jms.setHost(emailServer.getHost());
            //邮件服务器端口
            jms.setPort(emailServer.getPort());
            //邮箱账号
            jms.setUsername(emailServer.getUsername());
            //邮箱密码
            jms.setPassword(emailServer.getPassword());
            //邮件协议 这里用的 smtp
            jms.setProtocol(emailServer.getProtocol());
            //编码
            jms.setDefaultEncoding(emailServer.getEncoding());
            Properties p = new Properties();
            p.setProperty("mail.smtp.auth", "true");
            p.setProperty("mail.smtp.starttls.enable", "true");
            p.setProperty("mail.smtp.starttls.required", "true");
            p.setProperty("mail.smtp.ssl.enable", "false");
            //这里填发送邮箱对应的SMTP地址 ,忽略证书,信任域名
            p.setProperty("mail.smtp.ssl.trust", emailServer.getHost());
            p.setProperty("mail.display.sendmail", "邮件发送");
            jms.setJavaMailProperties(p);
    
            from = emailServer.getUsername();
    
            return jms;
        }
    
    }

## 邮件发送 ##

public class SendEmail {
    
        @Autowired
        private TemplateEngine templateEngine;
    
        @Autowired
        private IVwEmailService vwEmailService;
    
        @Autowired
        private ISysFileInfoService sysFileInfoService;
    
        @Autowired
        private SmtpMailService smtpMailService;
    
        /**
         * 发送文本邮件
         * 含抄送人
         *
         * @param subject 邮件主题
         * @param content 邮件内容
         * @throws Exception 邮件发送异常
         */
        public void sendTextEmailByCC(String subject, String content) throws Exception {
            //收件人
            List<String> to = vwEmailService.selectEmailByReceivingType(ReceivingType.RECIPIENT.getCode());
    
            //抄送人
            List<String> cc = vwEmailService.selectEmailByReceivingType(ReceivingType.CC_TO.getCode());
    
            smtpMailService.sendSimpleMail(to, subject, content, cc);
    
        }
    
        /**
         * 发送HTML模板邮件
         * 含抄送人
         *
         * @throws Exception 邮件发送异常
         */
        public void sendHtmlEmailByCC() throws Exception {
            //收件人
            List<String> to = vwEmailService.selectEmailByReceivingType(ReceivingType.RECIPIENT.getCode());
    
            //抄送人
            List<String> cc = vwEmailService.selectEmailByReceivingType(ReceivingType.CC_TO.getCode());
    
            //获取邮件vo
            FromEmailVo vo = getfromEmailVo();
            // 通过 Context 构造模版中变量需要的值
            Context context = new Context();
            context.setVariable("email", vo);
            //模版进行渲染
            String emailTemplate = emailTemplate(context);
    
            smtpMailService.sendHtmlMail(to, DateUtils.datePath() + " 农安试验场原始数据上传情况", emailTemplate, cc);
    
        }
    
        /**
         * 发送附件邮件
         * 含抄送人
         *
         * @param subject    邮件主题
         * @param content    邮件内容
         * @param attachment 附件
         * @throws Exception 邮件发送异常
         */
        public void sendAttachmentByCC(String subject, String content, List<String> attachment) throws Exception {
            //收件人
            List<String> to = vwEmailService.selectEmailByReceivingType(ReceivingType.RECIPIENT.getCode());
    
            //抄送人
            List<String> cc = vwEmailService.selectEmailByReceivingType(ReceivingType.CC_TO.getCode());
    
            smtpMailService.sendAttachmentsMail(to, subject, content, attachment, cc);
        }
    
        /**
         * 获取封装的邮件vo
         *
         * @return
         */
        public FromEmailVo getfromEmailVo() throws Exception {
            String uploadPath = RuoYiConfig.getUploadPath();
            List<SysFileInfo> sysFileInfos = sysFileInfoService.selectFileName();
            List<EmailDataVo> gpsList = new ArrayList<>();
            Long amount = 0L;
            for (SysFileInfo fi : sysFileInfos) {
                File file = new File(uploadPath + File.separator + fi.getExperimentName() + File.separator + "log" + File.separator + fi.getFileTime());
                //判断当天是否上传过数据
                if (file.exists() && file.isDirectory()) {
                    //获取文件夹大小
                    long totalSizeOfFilesInDir = getTotalSizeOfFilesInDir(file);
                    Double fileSizeMb = YmlUtil.getFileSizeMb(totalSizeOfFilesInDir);
                    amount += totalSizeOfFilesInDir;
    
                    EmailDataVo vo = new EmailDataVo();
                    vo.setCode(fi.getExperimentName());
                    vo.setCodeUrl(fi.getExperimentName() + "/" + "log");
                    vo.setGpsUrl(fi.getExperimentName() + "/" + "log" + "/" + fi.getFileTime());
                    vo.setDate(fi.getFileTime());
                    vo.setFolderSize(fileSizeMb);
                    gpsList.add(vo);
                }
            }
    
            FromEmailVo vo = new FromEmailVo();
            //字节转换
            String fileSize = YmlUtil.getFileSizeString(amount);
            vo.setAmount(fileSize);
            vo.setDate(DateUtils.datePath());
    
            List<EmailDataVo> list = new ArrayList<>();
    
            for (EmailDataVo gp : gpsList) {
                EmailDataVo ed = new EmailDataVo();
                ed.setCode(gp.getCode());
                //外部链接
                ed.setCodeUrl("https://www.baidu.com");
                ed.setDate(gp.getDate());
                //外部链接
                ed.setDateUrl("https://www.baidu.com");
                ed.setTrace(gp.getTrace());
                ed.setFolderSize(gp.getFolderSize());
                ed.setMigrations("迁移完成 Upload Finished");
                list.add(ed);
            }
    
            vo.setList(list);
    
            return vo;
        }
    
        /**
         * 返回文件或文件夹大小
         *
         * @param file
         * @return
         */
        private long getTotalSizeOfFilesInDir(File file) {
            if (file.isFile()) {
                return file.length();
            }
            final File[] children = file.listFiles();
            long total = 0;
            if (children != null) {
                for (final File child : children) {
                    total += getTotalSizeOfFilesInDir(child);
                }
    
            }
            return total;
        }
    
        /**
         * html模板转字符串
         *
         * @param context
         * @return
         */
        public String emailTemplate(Context context) {
            // 使用TemplateEngine 对模版进行渲染（Thymeleaf 模版默认位置是 resources/templates）
            String template = "template/email-template.html";
            return templateEngine.process(template, context);
        }
    
    }

## **结果**![28f477327afd4b64a5f3f1d8c6803851.png][] ##

[28f477327afd4b64a5f3f1d8c6803851.png]: https://img-blog.csdnimg.cn/28f477327afd4b64a5f3f1d8c6803851.png