利用JAVAMAIL发送邮件

技术2022-05-19 27

不知道该叫原创还是叫转贴.有参考别人代码,也有自己的创新.如有版权问题请及时通知我.

1. 一个单例的发送类

package sendmail; import java.io.FileReader; import java.io.IOException; import java.util.Date; import java.util.HashMap; import java.util.Map; import java.util.Properties; import javax.activation.DataHandler; import javax.activation.FileDataSource; import javax.mail.Authenticator; import javax.mail.Message; 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; /** * Title: MailSender * Description: * Created: 2011-4-14 下午08:49:13 * * @author ShengYan * @version */ public class MailSender { static { getProperties(); } private MailSender() { } static class SingletonHolder { static MailSender instance = new MailSender(); } public static MailSender getInstance() { return SingletonHolder.instance; } private static String HOST; private static String USERNAME; private static String PASSWORD; private static String FROM; private static String TO; private static String MAIL_HOST="smtp.mobiscloud.com"; private static String MAIL_USERNAME="support@mobiscloud.com"; private static String MAIL_PASSWORD="1123456"; private static String MAIL_FROM="support@mobiscloud.com"; private static String MAIL_TO="sheng.yan@mobiscloud.com"; public static final String EMAIL_SUBJECT = "subject"; public static final String EMAIL_TEXT = "text"; public static final String EMAIL_ATTACHMENT = "attachment"; public static void main(String[] args) { MailSender sender = MailSender.getInstance(); Map<String, String> map = new HashMap<String, String>(); map.put(EMAIL_SUBJECT, "标题 is xxx"); map.put(EMAIL_TEXT, "内容 is ccc"); map.put(EMAIL_ATTACHMENT, "C:/Users/yansheng/Pictures/binding_expression.png"); sender.sendEmail(map); } private static void getProperties() { String path = MailSender.class.getResource(MailSender.class.getSimpleName() + ".properties").getPath(); path = path.substring(1); System.out.println("-------------mailsender path: " + path); Properties prop = new Properties(); FileReader reader = null; try { reader = new FileReader(path); prop.load(reader); } catch (IOException e) { e.printStackTrace(); } if (null != reader) { try { reader.close(); } catch (IOException e) { e.printStackTrace(); } } if (0 != prop.size()) { HOST = prop.getProperty("MAIL_HOST"); USERNAME = prop.getProperty("MAIL_USERNAME"); PASSWORD = prop.getProperty("MAIL_PASSWORD"); FROM = prop.getProperty("MAIL_FROM"); TO = prop.getProperty("MAIL_TO"); } else { HOST = MAIL_HOST; USERNAME = MAIL_USERNAME; PASSWORD = MAIL_PASSWORD; FROM = MAIL_FROM; TO = MAIL_TO; } } public boolean sendEmail(Map<String, String> data) { // 创建Properties 对象 Properties props = System.getProperties(); props.put("mail.smtp.host", HOST); // 全局变量 props.put("mail.smtp.auth", "true"); // 创建邮件会话 //不带auth // Session session = Session.getDefaultInstance(props); Session session = Session.getDefaultInstance(props, new Authenticator() { // 验账账户 @Override public PasswordAuthentication getPasswordAuthentication() { return new PasswordAuthentication(USERNAME, PASSWORD); } }); try { // 定义邮件信息 MimeMessage message = new MimeMessage(session); message.setFrom(new InternetAddress(FROM)); message.addRecipients(Message.RecipientType.TO, TO); // 添加邮件发送时间（不知道体现在哪儿） message.setSentDate(new Date()); // 要编码，否则中文会出乱码，貌似这个方法是对数据进行了 // ("=?GB2312?B?"+enc.encode(subject.getBytes())+"?=")形势的包装 message.setSubject(MimeUtility.encodeText(data.get(EMAIL_SUBJECT), "gbk", "B")); MimeMultipart mmp = new MimeMultipart(); MimeBodyPart mbp_text = new MimeBodyPart(); // "text/plain"是文本型，没有样式， // "text/html"是html样式，可以解析html标签 mbp_text.setContent(data.get(EMAIL_TEXT), "text/html;charset=gbk"); mmp.addBodyPart(mbp_text); // 加入邮件正文 // 处理附件，可以添加多个附件 if (data.get(EMAIL_ATTACHMENT) != null) { String[] files = data.get(EMAIL_ATTACHMENT).split(","); if (files.length != 0) { for (String file : files) { MimeBodyPart mbp_file = new MimeBodyPart(); FileDataSource fds = new FileDataSource(file); mbp_file.setDataHandler(new DataHandler(fds)); mbp_file.setFileName(MimeUtility.encodeText( fds.getName(), "gbk", "B")); mmp.addBodyPart(mbp_file); } } } message.setContent(mmp); // message.setText(data.get(Constants.EMAIL_TEXT)); // 发送消息 // session.getTransport("smtp").send(message); //也可以这样创建Transport对象 Transport.send(message); return true; } catch (Exception e) { e.printStackTrace(); return false; } } }

2.一个properties文件

#POST 服务器MAIL_HOST=g.gmail.com #发件登录用户MAIL_USERNAME=support@google.com #发件登录密码MAIL_PASSWORD=1123456 #发件人MAIL_FROM=support@google.co m#收件人MAIL_TO=recevie@google.com

参考资料:http://coolshell.cn/articles/4261.html

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