[基本功能]发送邮件

jar包：mail.jar & activation.jar

方法类

import java.util.Date; import java.util.Properties; import javax.activation.CommandMap; import javax.activation.DataHandler; import javax.activation.DataSource; import javax.activation.FileDataSource; import javax.activation.MailcapCommandMap; import javax.mail.Authenticator; import javax.mail.BodyPart; import javax.mail.Multipart; import javax.mail.PasswordAuthentication; import javax.mail.Session; import javax.mail.Transport; 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 Mail extends Authenticator { private String _user; private String _pass; private String[] _to; private String _from; private String _subject; private String _body; private Multipart _multipart; private Mail() { this._multipart = new MimeMultipart(); MailcapCommandMap commandMap = (MailcapCommandMap) CommandMap.getDefaultCommandMap(); commandMap.addMailcap("text/html;;x-java-content-handler=com.sun.mail.handlers.text_html"); commandMap.addMailcap("text/xml;; x-java-content-handler=com.sun.mail.handlers.text_xml"); commandMap.addMailcap("text/plain;; x-java-content-handler=com.sun.mail.handlers.text_plain"); commandMap.addMailcap("multipart/*;; x-java-content-handler=com.sun.mail.handlers.multipart_mixed"); commandMap.addMailcap("message/rfc822;; x-java-content-handler=com.sun.mail.handlers.message_rfc822"); CommandMap.setDefaultCommandMap(commandMap); } public Mail(String user, String pass) { this(); this._user = user; this._pass = pass; } public void set_from(String _from) { this._from = _from; } public void set_to(String[] _to) { this._to = _to; } public void set_subject(String _subject) { this._subject = _subject; } public void set_body(String _body) { this._body = _body; } /* 添加附件 */ public void addAttachment(String filename) throws Exception { BodyPart messageBodyPart = new MimeBodyPart(); DataSource source = new FileDataSource(filename); DataHandler dataHandler = new DataHandler(source); messageBodyPart.setDataHandler(dataHandler); messageBodyPart.setFileName(MimeUtility.encodeText(dataHandler.getName())); // 解决中文附件名乱码 _multipart.addBodyPart(messageBodyPart); } public boolean send() throws Exception { Properties props = _setProperties(); if (!_user.equals("") && !_pass.equals("") && _to.length > 0 && !_from.equals("") && !_subject.equals("") && !_body.equals("")) { Authentication authentication = new Authentication(_user, _pass); Session session = Session.getDefaultInstance(props, authentication); session.setDebug(true); MimeMessage msg = new MimeMessage(session); msg.setFrom(new InternetAddress(_from)); InternetAddress[] addressTo = new InternetAddress[_to.length]; for (int i = 0; i < _to.length; i++) { addressTo[i] = new InternetAddress(_to[i]); } msg.setRecipients(MimeMessage.RecipientType.TO, addressTo); msg.setSubject(_subject); msg.setSentDate(new Date()); BodyPart messageBodyPart = new MimeBodyPart(); messageBodyPart.setText(_body); _multipart.addBodyPart(messageBodyPart); msg.setContent(_multipart); Transport.send(msg); return true; } else { return false; } } private Properties _setProperties() { Properties props = new Properties(); props.put("mail.smtp.host", "---"); props.put("mail.smtp.port", "---"); props.put("mail.protocol", "smtp"); props.put("mail.useSSL", "false"); props.put("mail.smtp.auth", "true"); return props; } @Override public PasswordAuthentication getPasswordAuthentication() { return new PasswordAuthentication(_user, _pass); } /** * 公共方法：发送邮件 */ public static void send(String username, String password, String[] receivers, String title, String content, String... filePaths) { new Thread(() -> { Mail mail = new Mail(username, password); mail.set_to(receivers); mail.set_from(username); mail.set_subject(title); mail.set_body(content); try { for (String path : filePaths) { mail.addAttachment(path); } if (mail.send()) { } else { } } catch (Exception e) { e.printStackTrace(); } }).start(); } }

调用示例

public class MailTest { public static void main(String[] args) { String username = "---@gmail.com"; String password = "******"; String[] recievers = { "---1@gmail.com", "---2@gmail.com", }; String title = "title"; String content = "content"; Mail.send(username, password, recievers, title, content); } }