记录一个java发送邮件的代码

旧城等待， 2022-05-16 01:58 94阅读 0赞

> 记录一个java发送邮件代码，发送邮件需要三个java包链接：[https://pan.baidu.com/s/14O2ExhQOAjhbGju2GjcyFg][https_pan.baidu.com_s_14O2ExhQOAjhbGju2GjcyFg] 密码：3hp5

package com.raying.abs.util.email;
    
    import java.io.File;
    import java.util.ArrayList;
    import java.util.List;
    import java.util.Properties;
    import java.util.regex.Matcher;
    import java.util.regex.Pattern;
    
    import javax.activation.DataHandler;
    import javax.activation.FileDataSource;
    import javax.mail.Address;
    import javax.mail.Message;
    import javax.mail.Session;
    import javax.mail.Transport;
    import javax.mail.internet.AddressException;
    import javax.mail.internet.InternetAddress;
    import javax.mail.internet.MimeBodyPart;
    import javax.mail.internet.MimeMessage;
    import javax.mail.internet.MimeMultipart;
    import javax.mail.internet.MimeUtility;
    
    
    
    public class EmailSendUnit { 
        /** * email地址正则表达式 */
        public static final String EMAIL_REG_EXP = "^(\\w)+(\\.\\w+)*@(\\w)+((\\.\\w+)+)$";//"^(\\w)+(.)*@(.)+$"
    
        /** * smtp服务器地址 */
        private String smtp;
    
        /** * 登录用户名 */
        private String userName;
    
        /** * 登录密码 */
        private String password;
    
        /** * 发件邮箱 */
        private String emailFrom;
    
        /** * 发件时是否身份验证，一般外部smtp服务器都要，否则发送不了 */
        private boolean auth = true;
    
        public EmailSendUnit(String smtp, String userName, String password, String emailFrom, boolean auth) {
            this.smtp = smtp;
            this.userName = userName;
            this.password = password;
            this.emailFrom = emailFrom;
            this.auth = auth;
        }
    
        public EmailSendUnit(String smtp, String userName, String password, String emailFrom) {
            this.smtp = smtp;
            this.userName = userName;
            this.password = password;
            this.emailFrom = emailFrom;
        }
    
        /** * 发送邮件 * * @param emailTos 收件email集 * @param title 标题 * @param text 正文 */
        public void send(String[] emailTos, String title, String text) throws Exception {
            this.send(emailTos, null, null, title, text, null, true);
        }
    
        /** * 发送邮件 * * @param emailTos 收件email集 * @param title 标题 * @param text 正文 * @param isHtml */
        public void send(String[] emailTos, String title, String text, Boolean isHtml) throws Exception {
            this.send(emailTos, null, null, title, text, null, isHtml);
        }
    
        /** * 发送邮件 * * @param emailTos 收件email集 * @param emailCCTos 抄送email集 * @param title 标题 * @param text 正文 * @param isHtml */
        public void send(String[] emailTos, String[] emailCCTos, String title, String text, Boolean isHtml) throws Exception {
            this.send(emailTos, emailCCTos, null, title, text, null, isHtml);
        }
    
        /** * 发送邮件 * * @param emailTos 收件email集 * @param emailCCTos 抄送email集 * @param emailBCCTos 暗送email集 * @param title 标题 * @param text 正文 * @param attachments 附件集(本地文件地址) * @param isHtml */
        public void send(String[] emailTos, String[] emailCCTos, String[] emailBCCTos, String title, String text, String[] attachments, Boolean isHtml) {
            try {
                //====参数检查====
                Address[] addrTos = this.castEmailAddress(emailTos);
                if (addrTos == null || addrTos.length == 0) {
                    throw new RuntimeException("收件地址无效");
                }
    
                //====组装会话====
                Properties properties = new Properties();
                properties.put("mail.transport.protocol", "smtp");
                properties.put("mail.smtp.host", smtp);
                properties.put("mail.smtp.auth", String.valueOf(auth).toLowerCase());
                Session session = Session.getInstance(properties);
    
                //====组装邮件体====
                MimeMessage message = new MimeMessage(session);//----最重要的，邮件体
                MimeMultipart multipart = new MimeMultipart();
                multipart.setSubType("related");
    
                //----1:标题、正文、收件地址(多)、抄送地址(多)、暗送地址(多)
                String titleStr = (title == null ? "" : title);
                message.setSubject(titleStr);
                message.setSentDate(new java.util.Date());
                message.setFrom(new InternetAddress(emailFrom));
                message.setRecipients(Message.RecipientType.TO, this.castEmailAddress(emailTos));
                if (emailCCTos != null && emailCCTos.length > 0) {
                    Address[] addrCCs = this.castEmailAddress(emailCCTos);
                    if (addrCCs != null && addrCCs.length > 0) {
                        message.setRecipients(Message.RecipientType.CC, addrCCs);
                    }
                }
                if (emailBCCTos != null && emailBCCTos.length > 0) {
                    Address[] addrBCCs = this.castEmailAddress(emailBCCTos);
                    if (addrBCCs != null && addrBCCs.length > 0) {
                        message.setRecipients(Message.RecipientType.BCC, addrBCCs);
                    }
                }
    
                //----2:组装text/html格式的正文----
                String textStr = text == null ? "" : text;
                textStr = isHtml ? toHtml(textStr) : toText(textStr);
                MimeBodyPart messageBodyText = new MimeBodyPart(); //正文的MimeBodyPart
                messageBodyText.setContent(textStr, "text/html;charset=utf-8");
                messageBodyText.setHeader("Content-ID ", "page ");
                multipart.addBodyPart(messageBodyText);
    
                // ----3:组装附件----
                if (attachments != null && attachments.length > 0) {
                    for (int i = 0; i < attachments.length; i++) {
                        File attachFile = new File(attachments[i]);
                        if (!attachFile.exists() || !attachFile.isFile()) {
                            continue;
                        }
                        MimeBodyPart messageBodyAttach = new MimeBodyPart(); //附件的MimeBodyPart
                        messageBodyAttach.setDataHandler(new DataHandler(new FileDataSource(attachFile.getAbsolutePath())));
                        messageBodyAttach.setFileName(MimeUtility.encodeText(attachFile.getName(), "utf-8", null)); // 对附件名编码，防止乱码
                        multipart.addBodyPart(messageBodyAttach, i + 1); // index从1开始，0为邮件内容
                    }
                }
    
                message.setContent(multipart);
                message.saveChanges();
    
                Transport transport = session.getTransport("smtp");
                transport.connect(smtp, userName, password);
                transport.sendMessage(message, message.getAllRecipients());
                transport.close();
            } catch (RuntimeException e) {
                throw e;
            } catch (Exception e) {
                throw new RuntimeException(e);
            }
        }
    
        /** * 组装邮件地址 */
        private Address[] castEmailAddress(String[] emailAddress) {
            List<Address> adrList = new ArrayList<Address>();
            if (emailAddress != null && emailAddress.length > 0) {
                for (String e : emailAddress) {
                    Matcher m = Pattern.compile(EMAIL_REG_EXP).matcher(e);
                    if (m.find()) {
                        try {
                            adrList.add(new InternetAddress(e));
                        } catch (AddressException e1) {
    
                        }
                    }
                }
            }
            return adrList.toArray(new Address[adrList.size()]);
        }
    
        /** * html处理 */
        public String toHtml(String str) {
            return str.replaceAll("\n", " ")
                    .replaceAll("\t", " ");
        }
    
        /** * 转换目标文本，在网页上显示纯文本，无html效果(文本框中写的内容在网页上显的效果是一样的) */
        public String toText(String str) {
            return str.replaceAll("&", "&")
                    .replaceAll("<", "<")
                    .replaceAll(">", ">")
                    .replaceAll("\n", "<br>")
                    .replaceAll("\t", "&#9")
                    .replaceAll(" ", " ");
        }
    
        public static void main(String[] args) {
            EmailSendUnit ems = new EmailSendUnit("smtp.exmail.qq.com", "madman@xxx.com", "xxxx", "madman@xxx.com");
            String[] toEmail = {
       "1740963193@qq.com", "madman@xx.com"};
            try {
                ems.send(toEmail, "测试标题", "这是内容");
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
    
    }

[https_pan.baidu.com_s_14O2ExhQOAjhbGju2GjcyFg]: https://pan.baidu.com/s/14O2ExhQOAjhbGju2GjcyFg