使用Java Mail Authenticator子类进行用户认证来发送电子邮件示例

/** * CrazyItTest * 使用JavaMail的Authenticator类进行用户认证发送带附件的电子邮件示例 */ package com.labci.javamail.test; import java.io.FileNotFoundException; import java.io.IOException; import java.io.UnsupportedEncodingException; import java.util.Date; import java.util.Properties; import javax.activation.DataHandler; import javax.activation.FileDataSource; import javax.mail.Authenticator; import javax.mail.MessagingException; import javax.mail.PasswordAuthentication; import javax.mail.Session; import javax.mail.Transport; import javax.mail.Message.RecipientType; 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; /** * @author Bill Tu * @since May 26, 2011(21:03:36 PM) * */ public class SendEmailTest { private static final String USERNAME="iwtxokhtd";//用户名 private static final String PASSWORD="123456";//密码 private static final String PROTOCOL="smtp";//邮件传输协议 private static final String HOST="smtp.163.com";//SMTP服务器主机地址 /** * 客户端程序自己实现Authenticator子类用于用户认证 */ static class MyAuthenricator extends Authenticator{ String user=null; String pass=""; public MyAuthenricator(String user,String pass){ this.user=user; this.pass=pass; } @Override protected PasswordAuthentication getPasswordAuthentication() { return new PasswordAuthentication(user,pass); } } private static Session getSession(){ Properties mailProps=new Properties(); mailProps.put("mail.smtp.auth", "true");//向SMTP服务器提交用户认证 mailProps.put("mail.transport.protocol", PROTOCOL);//指定发送邮件协议 mailProps.put("mail.host", HOST);//SMTP服务器主机地址 //拿session的时候传入Authenticator子类进行验证 Session session=Session.getDefaultInstance(mailProps,new MyAuthenricator(USERNAME,PASSWORD)); return session; } private static void sendEmail(MimeMessage message) throws MessagingException{ //从session中取mail.smtp.protocol指定协议的Transport Transport transport=getSession().getTransport(); //建立与指定的SMTP服务器的连接 transport.connect();//此时不需要任务参数 //发给所有指定的收件人,若使用message.getAllRecipients()则还包括抄送和暗送的人 transport.sendMessage(message, message.getRecipients(RecipientType.TO)); //关闭连接 transport.close(); /** * Transport的send静态方法包括了connect,saveChanges,sendMessage,close等一系列操作， * 但它连接同一个SMTP服务器每发一封邮件给服务器都得重新建立连接和断开连接, * 虽然使用较方便，但开销较大,不值得推荐。 */ // Transport.send(message, message.getRecipients(RecipientType.TO)); } private static MimeMessage getTextMessage(Session session) throws AddressException, MessagingException, UnsupportedEncodingException{ MimeMessage message=new MimeMessage(session); String from="[email protected]";//发送方邮件地址 String to="[email protected]";//接收方邮件地址 String subject="从163发过来的邮件";//邮件主题，注意是中文的 String content="<h1>看看能收到不,JavaMail写的邮件发送程序，带附件哦</h1><img src="cid:my1.jpg" mce_src="cid:my1.jpg"/>";//cid为my1.jpg，下文会设置此cid message.setFrom(new InternetAddress(from)); message.setRecipient(RecipientType.TO, new InternetAddress(to)); message.setSubject(subject); message.setSentDate(new Date());//发送时间 MimeBodyPart picBodyPart=getPicBodyPart(content,"F://My头像.jpg"); MimeBodyPart attached1BodyPart=getAttachedBodyPart("F://nginx中文.txt");//注意附件名是中文的 MimeBodyPart attached2BodyPart=getAttachedBodyPart("F://nginx英文.doc"); MimeMultipart mmp=new MimeMultipart("mixed");//MIME消息头组合类型是mixed(html+附件) mmp.addBodyPart(picBodyPart); mmp.addBodyPart(attached1BodyPart); mmp.addBodyPart(attached2BodyPart); message.setContent(mmp); message.saveChanges(); return message; } /** * 处理文件名 * 此处是针对Window下的。 * @param filePath * @return */ private static String doHandlerFileName(String filePath){ String fileName=filePath; if(null !=filePath && !"".equals(filePath)){ fileName=filePath.substring(filePath.lastIndexOf("//")+1); } return fileName; } private static MimeBodyPart getAttachedBodyPart(String filePath) throws MessagingException, UnsupportedEncodingException{ MimeBodyPart attached=new MimeBodyPart(); FileDataSource fds=new FileDataSource(filePath); attached.setDataHandler(new DataHandler(fds)); String fileName=doHandlerFileName(filePath); attached.setFileName(MimeUtility.encodeWord(fileName));//处理附件文件的中文名问题 return attached; } /** * 处理html加图片的类型(related) * @param content * @param picName * @return * @throws MessagingException */ private static MimeBodyPart getPicBodyPart(String content,String picName) throws MessagingException{ MimeBodyPart contentPart=new MimeBodyPart(); MimeMultipart mmp=new MimeMultipart("related");//此处MIME消息头组合类型为related MimeBodyPart contented=new MimeBodyPart(); contented.setContent(content,"text/html;charset=gb2312");//因正文内容中有中文 mmp.addBodyPart(contented); MimeBodyPart picBodyPart=new MimeBodyPart(); FileDataSource fds=new FileDataSource(picName); picBodyPart.setDataHandler(new DataHandler(fds)); picBodyPart.setContentID("my1.jpg");//设置contentId mmp.addBodyPart(picBodyPart); contentPart.setContent(mmp); return contentPart; } public static void main(String[] args) throws AddressException, MessagingException, FileNotFoundException, IOException { sendEmail(getTextMessage(getSession())); } }