j2ee 开发web两种邮件发送方式

1、javax.mail支持发送

1-1、pom文件gav配置

 <dependency>
     <groupId>javax.mailgroupId>
     <artifactId>mailartifactId>
     <version>1.4.7version>
 dependency>
 
 <dependency>
     <groupId>javax.activationgroupId>
     <artifactId>activationartifactId>
     <version>1.1.1version>
 dependency>

1-2、邮件配置属性

163邮箱配置实例：

        Properties properties = new Properties();
        properties.setProperty("mail.transport.protocol", "smtp");
        properties.setProperty("mail.smtp.host", mailSmtpHost);
        properties.setProperty("mail.smtp.auth", "true");
        properties.setProperty("mail.smtp.port",port);

gmail邮箱配置实例：

        Properties properties = new Properties();
        properties.setProperty("mail.transport.protocol", "smtp");
        properties.setProperty("mail.smtp.host", mailSmtpHost);
        properties.setProperty("mail.smtp.auth", "true");
        properties.setProperty("mail.smtp.port",port);
        properties.setProperty("mail.smtp.starttls.enable", "true");
        properties.setProperty("mail.smtp.starttls.required", "true");
        properties.setProperty("mail.smtp.ssl.enable", "true");
        properties.setProperty("mail.smtp.auth", "true");

1-3、邮件发送代码片段

    public static final String MAIL_TEMPLATE_CONTENT = "
用户：%s
图片：
（1）、 
";
    
  Session session = Session.getInstance(properties);
  MimeMessage message = new MimeMessage(session);
  message.setFrom(new InternetAddress(mailAccount));
  InternetAddress[] internetAddresses = InternetAddress.parse(receiveMaile);
  message.setRecipients(Message.RecipientType.TO, internetAddresses);
  message.setSubject("主题");
  //设置邮件发送内容
  message.setContent(createMimeMultipart(mailContentDTO));
  message.saveChanges();

  Transport transport = session.getTransport();
  transport.connect(mailAccount, mailAccountPassword);
  transport.sendMessage(message, message.getAllRecipients());
  transport.close();

   public MimeMultipart createMimeMultipart(MailContentDTO mailContentDTO) throws MessagingException, UnsupportedEncodingException {
        MimeMultipart mmTextImage = new MimeMultipart();
        int picNum = 1;
        for (MultipartFile multipartFile : mailContentDTO.getMultipartFiles()) {
            File file1 = new File(sendmailLocaldirPath);
            if (!file1.exists()) {
                file1.mkdirs();
            }
            String fileName = multipartFile.getOriginalFilename();
            if (fileName == null) {
                continue;
            }
            log.info("fileName={}", fileName);
            String fileNameEndPrefix = "";
            if (fileName.contains(".")) {
                fileNameEndPrefix = fileName.substring(fileName.lastIndexOf(".") - 1);
            }
            File file = new File(String.format(LOCAL_FILE_PATH, sendmailLocaldirPath, UUID.randomUUID().toString(), fileNameEndPrefix));
            try (InputStream inputStream = multipartFile.getInputStream();
                 FileOutputStream fileOutputStream = new FileOutputStream(file);
                 ByteArrayOutputStream output = new ByteArrayOutputStream();
            ) {
                byte[] buffer = new byte[1024];
                int i = 0;
                while ((i = inputStream.read(buffer)) != -1) {
                    output.write(buffer, 0, i);
                }
                fileOutputStream.write(output.toByteArray());
            } catch (IOException e) {
                log.error(e.getMessage(), e);
                continue;
            }
            MimeBodyPart image = new MimeBodyPart();
            image.setDataHandler(new DataHandler(new FileDataSource(file)));
            image.setContentID("picture_view" + picNum);
            mmTextImage.addBodyPart(image);
            picNum++;
        }

        MimeBodyPart text = new MimeBodyPart();
        text.setContent(mimeMessageHelper.setText(String.format(MAIL_TEMPLATE_CONTENT，"用户名"),  "text/html;charset=UTF-8");
        mmTextImage.addBodyPart(text);
        mmTextImage.setSubType("related");
        return mmTextImage;
    }

2、spring boot支持发送

2-1、pom文件gav配置

<dependency>
    <groupId>org.springframework.bootgroupId>
    <artifactId>spring-boot-starter-mailartifactId>
dependency>

2-1、邮件配置属性

163邮箱配置实例：

spring:
  mail:
    host: smtp.163.com
    password: xxxx
    username: [email protected]
    port: 25
  recive:
    mail: [email protected],[email protected]

gmail邮箱配置实例：

spring:
  mail:
    username: [email protected]
    password: xxxxxxx
    host: smtp.gmail.com
    port: 465
    properties:
      mail:
        smtp:
          starttls:
            enable: true
            required: true
          ssl:
            enable: true
          auth: true

  recive:
    mail: [email protected],[email protected],[email protected]

spring官方文档参考地址：
https://docs.spring.io/spring-boot/docs/current/reference/html/io.html#io.email
https://docs.spring.io/spring-framework/reference/integration/email.html
配置文件官方文档参考地址：
https://docs.spring.io/spring-boot/docs/current/reference/html/application-properties.html#appendix.application-properties.mail

2-3、邮件发送代码片段

    public static final String MAIL_TEMPLATE_CONTENT = "
用户：%s
图片：
（1）、 
";
  
  MimeMessage message = mailSender.createMimeMessage();
        MimeMessageHelper mimeMessageHelper = new MimeMessageHelper(message, true);
        mimeMessageHelper.setFrom(username);
        mimeMessageHelper.setText(String.format(MAIL_TEMPLATE_CONTENT，"用户名"), true);
        mimeMessageHelper.setSubject("主题");
       //设置邮件发送内容
        createMimeMultipart(mailContentDTO, mimeMessageHelper);

        mimeMessageHelper.setTo(mailContentDTO.getUserMail());
        mailSender.send(message);

        mimeMessageHelper.setTo(receiveMaile.split(","));
        mailSender.send(message);

   public MimeMessageHelper createMimeMultipart(MailContentDTO mailContentDTO, MimeMessageHelper mimeMessageHelper)
            throws MessagingException, UnsupportedEncodingException {
        MimeMultipart mmTextImage = new MimeMultipart();
        int picNum = 1;
        for (MultipartFile multipartFile : mailContentDTO.getMultipartFiles()) {
            File file1 = new File(sendmailLocaldirPath);
            if (!file1.exists()) {
                file1.mkdirs();
            }
            String fileName = multipartFile.getOriginalFilename();
            if (fileName == null) {
                continue;
            }
            log.info("fileName={}", fileName);
            String fileNameEndPrefix = "";
            if (fileName.contains(".")) {
                fileNameEndPrefix = fileName.substring(fileName.lastIndexOf(".") - 1);
            }
            File file = new File(String.format(SendMailManager.LOCAL_FILE_PATH, sendmailLocaldirPath, UUID.randomUUID().toString(), fileNameEndPrefix));
            try (InputStream inputStream = multipartFile.getInputStream();
                 FileOutputStream fileOutputStream = new FileOutputStream(file);
                 ByteArrayOutputStream output = new ByteArrayOutputStream();
            ) {
                byte[] buffer = new byte[1024];
                int i = 0;
                while ((i = inputStream.read(buffer)) != -1) {
                    output.write(buffer, 0, i);
                }
                fileOutputStream.write(output.toByteArray());
            } catch (IOException e) {
                log.error(e.getMessage(), e);
                continue;
            }
            mimeMessageHelper.addInline("picture_view" + picNum, new FileDataSource(file));
            picNum++;
        }
        return mimeMessageHelper;
    }