邮件发送源码: SendMail.java package com.lzw.mail; import java.util.Arrays; import java.util.Date; import java.util.Properties; import javax.activation.DataHandler; import javax.activation.DataSource; import javax.activation.FileDataSource; import javax.mail.Address; import javax.mail.Authenticator; import javax.mail.BodyPart; import javax.mail.Message; import javax.mail.MessagingException; import javax.mail.Multipart; import javax.mail.NoSuchProviderException; import javax.mail.PasswordAuthentication; 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 com.lzw.io.Out; /** * 邮件发送程序 * @author 李赵伟 Create: 2007-12-19 */ public class SendMail { private Session session; //会话 private Transport transport; //发送邮件 private User user; //邮件相关的帐户信息 private MailAddress mailAddress; //收件人地址 private MailBody mailBody; //邮件内容 private final String MAIL_SMTP_HOST = "mail.smtp.host"; private final String MAIL_SMTP_AUTH = "mail.smtp.auth"; public SendMail(User user) { this.user = user; init(); } /** * 初始化<code> Session, Transport </code> */ private void init() { Authenticator auth = new Authenticator() { protected PasswordAuthentication getPasswordAuthentication() { return new PasswordAuthentication(user.getUsername(), user .getPassword()); } }; Properties props = new Properties(); // 设置发送邮件的邮件服务器的属性(这里使用网易的smtp服务器) props.put(MAIL_SMTP_HOST, user.getHost()); // 需要经过授权,也就是有户名和密码的校验,这样才能通过验证(一定要有这一条) props.put(MAIL_SMTP_AUTH, "true"); // 用刚刚设置好的props对象构建一个session session = Session.getDefaultInstance(props, auth); try { // 发送邮件 transport = session.getTransport("smtp"); // 连接服务器的邮箱 transport.connect(user.getHost(), user.getUsername(), user .getPassword()); } catch (NoSuchProviderException e) { e.printStackTrace(); } catch (MessagingException e) { e.printStackTrace(); } Out.pln("与 " + user.getHost() + " 成功建立会话"); } /** * 设置收件人地址 * * @param mailAddress */ public void setAddress(MailAddress mailAddress) { this.mailAddress = mailAddress; } /** * 设置邮件内容 * * @param mailBody */ public void setMailBody(MailBody mailBody) { this.mailBody = mailBody; } /** * 构造邮件的内容 * * @return * @throws AddressException * @throws MessagingException */ private Message createMessage() throws AddressException, MessagingException { // 用session为参数定义消息对象 MimeMessage message = new MimeMessage(session); // 加载发件人地址 message.setFrom(new InternetAddress(user.getFrom())); message.setSentDate(new Date()); // 加载收件人地址 message.addRecipients(Message.RecipientType.TO, getAddress(mailAddress .getTo())); if (mailAddress.isHasCC()) message.addRecipients(Message.RecipientType.CC, getAddress(mailAddress.getCc())); // 加载标题 message.setSubject(mailBody.getSubject()); if (mailBody.isContentFlag() || mailBody.isAffixFlag()) { // 向multipart对象中添加邮件的各个部分内容,包括文本内容和附件 Multipart multipart = new MimeMultipart(); if (mailBody.isContentFlag()) { // 设置邮件的文本内容 MimeBodyPart contentPart = new MimeBodyPart(); if (mailBody.isMimeContent()) contentPart.setContent(mailBody.getContent(), "text/html;charset=GBK"); else contentPart.setText(mailBody.getContent()); multipart.addBodyPart(contentPart); } if (mailBody.isAffixFlag()) { // 添加附件 BodyPart affixBody = new MimeBodyPart(); DataSource source = new FileDataSource(mailBody.getAffix()); // 添加附件的内容 affixBody.setDataHandler(new DataHandler(source)); // 添加附件的标题这里很重要,通过下面的Base64编码的转换可以保证你的 // 中文附件标题名在发送时不会变成乱码 sun.misc.BASE64Encoder enc = new sun.misc.BASE64Encoder(); String fileName = "=?GBK?B?" + enc.encode(mailBody.getAffixName().getBytes()) + "?="; affixBody.setFileName(fileName); multipart.addBodyPart(affixBody); } // 将multipart对象放到message中 message.setContent(multipart); } // 保存邮件 message.saveChanges(); return message; } /** * 发送邮件,包含:邮件正文、(1个附件) * * @param debug * 调试设置 */ public void send(boolean debug) { // 有了这句便可以在发送邮件的过程中在console处显示过程信息,供调试使 // 用(你可以在控制台(console)上看到发送邮件的过程) session.setDebug(debug); try { Message message = createMessage(); transport.sendMessage(message, message.getAllRecipients()); } catch (AddressException e) { e.printStackTrace(); } catch (MessagingException e) { e.printStackTrace(); } Out.pln("\n----------------------------------------------------------"); Out.pln("- 邮件成功发送!"); Out.pln("- TO : " + Arrays.toString(mailAddress.getTo())); if (mailAddress.isHasCC()) Out.pln("- CC : " + Arrays.toString(mailAddress.getCc())); Out.pln("----------------------------------------------------------\n"); } /** * 关闭资源 * * @throws MessagingException */ public void close() throws MessagingException { if (null != transport) transport.close(); } public Address[] getAddress(String[] address) throws AddressException { Address[] addrs = new InternetAddress[address.length]; for (int i = 0; i < address.length; i++) addrs[i] = new InternetAddress(address[i]); return addrs; } /** * 测试 */ public static void main(String[] args) { String host = "smtp.sina.com"; String username = ""; String password = ""; // String from = ""; String to = ""; // String cc = null; String subject = "测试"; String content = "<a href=http://www.baidu.com>baidu</a>"; boolean mimeContent = true; String affix = "d:/temp/temp.txt"; String affixName = "temp.txt"; boolean debug = false; // String userFile = "user.properties"; // String addressFile = "mailaddress.properties"; SendMail mail = null; try { try { User user = new User(host, username, password); MailAddress mailAddress = new MailAddress(to); // User user = new User(userFile); // MailAddress mailAddress = new MailAddress(SendMail.class // .getResourceAsStream(addressFile)); MailBody mailBody = new MailBody(subject, content, mimeContent, affix, affixName); mail = new SendMail(user); // for (int i = 0; i < 5; i++) { // 设置发件人地址、收件人地址和邮件标题 mail.setAddress(mailAddress); // 设置要发送附件的位置和标题 mail.setMailBody(mailBody); // 设置smtp服务器以及邮箱的账号和密码 mail.send(debug); // try { // Thread.sleep(1 * 1000); // } catch (InterruptedException e) { // e.printStackTrace(); // } // mailBody = new MailBody(subject + "_" + (i + 1), content); // } } finally { if (null != mail) mail.close(); } } catch (AddressException e) { e.printStackTrace(); } catch (MessagingException e) { e.printStackTrace(); // } catch (IOException e) { // e.printStackTrace(); } } }
使用JavaMail发送邮件需要注意的地方: 使用免费的邮件服务器发送邮件时,需要对用户的身份做验证;而进行身份验证的过程又比较消耗时间,当用户需要发送多封邮件时如果每次都做身份验证的话时间的消耗是非常大的; 在整个邮件发送过程中Session(会话)的建立只需要一次,也就是说身份验证也只做一次就可以了,即Session session = Session. getDefaultInstance(props, auth); 发送邮件的过程相对比较简单,有一个需要注意的地方就是连接邮件服务器时transport.connect(user.getHost(), user.getUsername(), user.getPassword());也只需要执行一次即可,这个过程和身份验证一样都需要消耗大量时间。 该程序只允许发送带有一个附件的邮件;
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