1.前期准备

   获取邮箱授权码参考网址

2.pom.xml

<!--  java 提供的支持邮件发送相关业务的类 -->
    <dependency>
        <groupId>javax.mail</groupId>
        <artifactId>mail</artifactId>
        <version>1.4.7</version>
    </dependency>

3.代码演示

import java.util.Properties;
import javax.mail.Message;
import javax.mail.MessagingException;
import javax.mail.Session;
import javax.mail.Transport;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeMessage;

public class TestMail {
    public static void main(String[] args) throws MessagingException {
        Properties props = new Properties();
        props.setProperty("mail.smtp.auth", "true");
        props.setProperty("mail.transport.protocol", "smtp");
        props.put("mail.smtp.host","smtp.163.com");// smtp服务器地址

        Session session = Session.getInstance(props);
        session.setDebug(true);

        Message msg = new MimeMessage(session);
        msg.setSubject("这是一个测试程序....");
        msg.setText("第一个java-mail程序---CW");
        msg.setFrom(new InternetAddress("17809213302@163.com"));//发件人邮箱(我的163邮箱)
        msg.setRecipient(Message.RecipientType.TO,
                new InternetAddress("1161564760@qq.com")); //收件人邮箱
        msg.saveChanges();

        Transport transport = session.getTransport();
        transport.connect("17809213302@163.com","123456789abc");//发件人邮箱,授权码(可以在邮箱设置中获取到授权码的信息)

        transport.sendMessage(msg, msg.getAllRecipients());

        System.out.println("邮件发送成功...");
        transport.close();
    }
}