JavaMail笔记

如何在java中发送邮件？我这里参考的是JavaMail开源项目

依赖jar包：java.mail.jar 点击下载

普通邮件发送

测试用的是163邮箱，测试邮件发多了就报554了被识别为垃圾邮件–!

import com.sun.mail.smtp.SMTPTransport;import javax.mail.Message;import javax.mail.MessagingException;import javax.mail.Session;import javax.mail.internet.InternetAddress;import javax.mail.internet.MimeMessage;import java.security.GeneralSecurityException;import java.util.Date;import java.util.Properties;public class Mail {    public static void main(String[] args) {        try {            sendEmail("出塞", "秦时明月汉时关，万里长征人未还", "[e-mail]");        } catch (GeneralSecurityException e) {            e.printStackTrace();        } catch (MessagingException e) {            e.printStackTrace();        }    }    /**     *     * @param subject 邮件主题     * @param text 邮件内容     * @param to 收件人     * @throws GeneralSecurityException     * @throws MessagingException     */    private static void sendEmail(String subject, String text, String to) throws GeneralSecurityException, MessagingException {        String mailer   = "Microsoft Outlook Express 6.00.2900.2869"; // 发信客户端        String mailhost = "smtp.163.com"; // smtp服务器        String port     = "25"; // 默认端口为25        String user     = "[e-mail]"; // 邮箱账号        String password = "xxx"; // 邮箱密码        // 1、邮件会话实例        Properties props = new Properties();        // 属性设置        props.put("mail.smtp.host", mailhost);        props.put("mail.smtp.auth", "true");        Session session = Session.getInstance(props, null);        session.setDebug(true);        // 2、邮件消息内容封装        Message msg = new MimeMessage(session);        msg.setFrom(new InternetAddress(user));        msg.setRecipients(Message.RecipientType.TO, InternetAddress.parse(to, false));        msg.setSubject(subject);        msg.setText(text);        msg.setHeader("X-Mailer", mailer);        msg.setSentDate(new Date());        // 3、连接服务器并发送邮件        SMTPTransport t = (SMTPTransport) session.getTransport();        try {            t.connect(user, password);            t.sendMessage(msg, msg.getAllRecipients());        } finally {            t.close();        }        System.out.println("\nMail was sent successfully.");    }}

SSL加密

测试用了163和sina的邮箱都成功了

import com.sun.mail.smtp.SMTPTransport;import com.sun.mail.util.MailSSLSocketFactory;import javax.mail.Message;import javax.mail.MessagingException;import javax.mail.Session;import javax.mail.internet.InternetAddress;import javax.mail.internet.MimeMessage;import java.security.GeneralSecurityException;import java.util.Date;import java.util.Properties;public class Mail {    public static void main(String[] args) {        try {            sendEmail("出塞", "秦时明月汉时关，万里长征人未还", "[e-mail]");        } catch (GeneralSecurityException e) {            e.printStackTrace();        } catch (MessagingException e) {            e.printStackTrace();        }    }    private static void sendEmail(String subject, String text, String to) throws GeneralSecurityException, MessagingException {        String mailer   = "Microsoft Outlook Express 6.00.2900.2869"; // 发信客户端        String mailhost = "smtp.sina.com";        String port     = "465";        String user     = "[e-mail]"; // 邮箱账号        String password = "xxx"; // 邮箱密码        // 属性设置        Properties props = new Properties();        props.put("mail.smtp.auth", "true");        props.put("mail.smtp.host", mailhost);        props.put("mail.smtp.socketFactory.class", "javax.net.ssl.SSLSocketFactory");        props.put("mail.smtp.socketFactory.port", port);        props.put("mail.smtp.port", port);        props.put("mail.smtp.ssl.enable", "true"); // 启用SSL        MailSSLSocketFactory sf = new MailSSLSocketFactory();        sf.setTrustAllHosts(true);        props.put("mail.smtp.ssl.socketFactory", sf); // 信任证书        // 1、邮件会话        Session session = Session.getInstance(props, null);        session.setDebug(true);        // 2、邮件内容        Message msg = new MimeMessage(session);        msg.setFrom(new InternetAddress(user));        msg.setRecipients(Message.RecipientType.TO, InternetAddress.parse(to, false));        msg.setSubject(subject);        msg.setText(text);        msg.setHeader("X-Mailer", mailer);        msg.setSentDate(new Date());        // 3、连接服务器        SMTPTransport t = (SMTPTransport) session.getTransport();        try {            t.connect(user, password);            t.sendMessage(msg, msg.getAllRecipients());        } finally {            t.close();        }        System.out.println("\nMail was sent successfully.");    }}

STARTTLS加密

测试用的是微软outlook邮箱发送成功

import com.sun.mail.smtp.SMTPTransport;import javax.mail.Message;import javax.mail.MessagingException;import javax.mail.Session;import javax.mail.internet.InternetAddress;import javax.mail.internet.MimeMessage;import java.security.GeneralSecurityException;import java.util.Date;import java.util.Properties;public class Mail {    public static void main(String[] args) {        try {            sendEmail("出塞", "秦时明月汉时关，万里长征人未还", "[e-mail]");        } catch (GeneralSecurityException e) {            e.printStackTrace();        } catch (MessagingException e) {            e.printStackTrace();        }    }    private static void sendEmail(String subject, String text, String to) throws GeneralSecurityException, MessagingException {        String mailer   = "Microsoft Outlook Express 5.50.4807.1700"; // 发信客户端        String user     = "[e-mail]"; // 邮箱账号        String password = "xxx"; // 邮箱密码        // 属性设置        Properties props = new Properties();        props.put("mail.smtp.auth", "true");        props.put("mail.smtp.starttls.enable", "true");        props.put("mail.smtp.host", "smtp-mail.outlook.com"); // 微软outlook smtp服务器        props.put("mail.smtp.port", "587");        // 1、邮件会话        Session session = Session.getInstance(props, null);        session.setDebug(true); // 设置打印日志        // 2、邮件内容        Message msg = new MimeMessage(session);        msg.setFrom(new InternetAddress(user));        msg.setRecipients(Message.RecipientType.TO, InternetAddress.parse(to, false));        msg.setSubject(subject);        msg.setText(text);        msg.setHeader("X-Mailer", mailer);        msg.setSentDate(new Date());        // 3、连接服务器        SMTPTransport t = (SMTPTransport) session.getTransport();        try {            t.connect(user, password);            t.sendMessage(msg, msg.getAllRecipients());        } finally {            t.close();        }        System.out.println("\nMail was sent successfully.");    }}

注：有些邮箱可能需要去官网设置smtp状态，因为可能默认没有开启smtp支持；并且smtp服务器的具体地址一般在邮箱官网设置里寻找；

参考

http://www.oracle.com/technetwork/java/javamail/index.html
https://javaee.github.io/javamail/