最近使用到JavaMail，写了个简单的工具类，记录一下。
import java.util.Date;
import java.util.Properties;
import javax.mail.MessagingException;
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.MimeMessage.RecipientType;
import javax.mail.internet.MimeMultipart;
public class JavaMailUtils {
//连接SMTP服务器的主机名，这里以qq邮箱为例
private static final String SMTP_HOST = "smtp.qq.com";
//连接的端口号，587为ssl端口，默认为25端口
private static final String SMTP_PORT = "587";
//发件人
private static final String MAIL_FROM = "XXX@qq.com";
//连接邮件服务器的用户名（邮箱地址去除了@qq.com的部分）
private static final String USER = "XXX";
/**
* 授权码，就是你在邮件服务器上注册的密码，不是你的qq密码
* 在邮箱里开启smtp/imap服务时需要发送短信，成功后会得到一个授权码
*/
private static final String PASSWORD = "授权码";
private JavaMailUtils() {
}
/**
* send mail without attachments
*
* @param mailTo
* @param mailCc
* @param subject
* @param content
* @throws AddressException
* @throws MessagingException
*/
public static void sendMail(final String mailTo, final String mailCc, final String subject, final String content)
throws Exception {
// get the session
final Session session = getSession();
// create a mail
final MimeMessage message = createMail(session, mailTo, mailCc, subject, content);
// get the transport
final Transport transport = session.getTransport();
transport.connect(USER, PASSWORD);
transport.sendMessage(message, message.getAllRecipients());
transport.close();
}
public static void sendMail(final String mailTo, final String mailCc, final String subject, final String content,
final String[] attachments) throws Exception {
// get the session
final Session session = getSession();
// create a mail
final MimeMessage message = createMail(session, mailTo, mailCc, subject, content, attachments);
// get the transport
final Transport transport = session.getTransport();
transport.connect(USER, PASSWORD);
transport.sendMessage(message, message.getAllRecipients());
transport.close();
}
/**
* create a mail without attachments
*
* @param session
* @param mailTo
* @param mailCc
* @param subject
* @param content
* @return
* @throws Exception
*/
private static MimeMessage createMail(final Session session, final String mailTo, final String mailCc,
final String subject, final String content) throws Exception {
final MimeMessage message = new MimeMessage(session);
message.setFrom(new InternetAddress(MAIL_FROM));
message.setRecipients(RecipientType.TO, InternetAddress.parse(mailTo));
message.setRecipients(RecipientType.CC, InternetAddress.parse(mailCc));
message.setSubject(subject);
message.setContent(content, "text/html;charset=UTF-8");
message.setSentDate(new Date());
message.saveChanges();
return message;
}
/**
* create a mail with attachments
*
* @param session
* @param mailTo
* @param mailCc
* @param subject
* @param content
* @param attachments
* @return
*/
private static MimeMessage createMail(final Session session, final String mailTo, final String mailCc,
final String subject, final String content, final String[] attachments) throws Exception {
final MimeMessage message = new MimeMessage(session);
message.setFrom(new InternetAddress(MAIL_FROM));
message.setRecipients(RecipientType.TO, InternetAddress.parse(mailTo));
message.setRecipients(RecipientType.CC, InternetAddress.parse(mailCc));
message.setSubject(subject);
// set the multipart of the mail
final MimeMultipart multipart = new MimeMultipart();
// set content part of the mail
final MimeBodyPart contentPart = new MimeBodyPart();
contentPart.setContent(content, "text/html;charset=UTF-8");
multipart.addBodyPart(contentPart);
// set attachment part of the mail
final MimeBodyPart attach1 = new MimeBodyPart();
final MimeBodyPart attach2 = new MimeBodyPart();
if (attachments != null && attachments.length != 0) {
final int length = attachments.length;
if (length == 1) {
attach1.attachFile(attachments[0]);
multipart.addBodyPart(attach1);
}
if (length == 2) {
attach1.attachFile(attachments[0]);
attach2.attachFile(attachments[1]);
multipart.addBodyPart(attach1);
multipart.addBodyPart(attach2);
}
}
message.setContent(multipart);
message.setSentDate(new Date());
message.saveChanges();
return message;
}
/**
* get the session to transport mails
*/
private static Session getSession() {
// set the properties for connecting the mail server
final Properties props = new Properties();
props.setProperty("mail.debug", "true");
props.setProperty("mail.transport.protocol", "smtp");
props.setProperty("mail.host", SMTP_HOST);
props.setProperty("mail.smtp.auth", "true");
props.setProperty("mail.smtp.port", SMTP_PORT);
// ssl
props.setProperty("mail.imap.ssl.enable", "true");
props.setProperty("mail.imap.ssl.socketFactory.class", "DummySSLSocketFactory");
props.setProperty("mail.imap.ssl.socketFactory.fallback", "false");
// create the session
final Session session = Session.getDefaultInstance(props);
return session;
}
}
以上的工具类有个进行了重载的方法，因为对于没有附件的邮件和有附件的邮件，在构造邮件对象时是不一样的，有附件的邮件会稍微复杂一点。接着是测试类。
public class Test {
//收件人，多人的话要用英文的","来隔开
private static final String MAIL_TO = "XXX@qq.com";
//抄送人，多人的话要用英文的","来隔开
private static final String MAIL_CC = "XXX@qq.com";
//邮件的主题（因为只是测试用，所以写成静态常量了）
private static final String SUBJECT = "It's a test mail";
//邮件的内容（因为只是测试用，所以写成静态常量了）
private static final String CONTENT = "Hello World!<br>Bye!";
private static final String FILE_1 = "附件1的路径";
private static final String FILE_2 = "附件2的路径";
public static void main(final String[] args) {
final String[] attachments = {};
// final String[] attachments = {FILE_1, FILE_2};
try {
// JavaMailUtils.sendMail(MAIL_TO, MAIL_CC, SUBJECT, CONTENT);
JavaMailUtils.sendMail(MAIL_TO, MAIL_CC, SUBJECT, CONTENT, attachments);
} catch (final Exception e) {
e.printStackTrace();
}
}
}最后是导入的jar包：
javax.mail-1.6.0.jar
