1. 需要引用的jar包；
   <dependency> <groupId>javax.mail</groupId> <artifactId>mail</artifactId> <version>1.4.7</version> </dependency>

2. 工具类；
   `package cn.qin.xxltest.xxltask.service;
   import javax.mail.*;
   import javax.mail.internet.InternetAddress;
   import javax.mail.internet.MimeMessage;
   import java.util.Properties;

public class Email {

private static final String MAIL_USER = "******@qq.com";   //邮件服务器登录用户名

private static final String MAIL_PASSWORD = "bybtfpssyfvahrbeid";   //邮件服务器登录密码

private static final String MAIL_FROM_SMTP = "939634038@qq.com";  //发送邮件地址

public void sendmail(String[] mailArray,String subject,String content){
    Properties props = new Properties();
    //设置服务器验证
    props.setProperty("mail.smtp.auth", "true");
    //设置传输协议
    props.setProperty("mail.transport.protocol", "smtp");
    //选择服务类型
    props.setProperty("mail.host", "smtp.qq.com");
    //通过认证创建一个session实例
    Session session = Session.getInstance(props,
            new Authenticator()
            {
                protected PasswordAuthentication getPasswordAuthentication()
                {
                    return new PasswordAuthentication(MAIL_USER,MAIL_PASSWORD);
                }
            }
    );
    //显示邮件发送过程中的交互信息
    session.setDebug(true);

    Message msg = new MimeMessage(session);
    Transport transport=null;
    try {
        //邮件发送人
        msg.setFrom(new InternetAddress(MAIL_FROM_SMTP));
        //邮件主题
        msg.setSubject(subject);
        //邮件内容
        msg.setText(content);
        int len=mailArray.length;
        InternetAddress address[]=new InternetAddress[len];
        for (int i = 0; i < mailArray.length; i++) {
            address[i]=new InternetAddress(mailArray[i]);
        }
        //邮件接收方
        msg.addRecipients(Message.RecipientType.TO, address);
        transport.send(msg);
    } catch (Exception e) {
        e.printStackTrace();
    }finally{
        try {
            if(transport!=null){
                transport.close();
            }
        } catch (Exception e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
    }
}
public static void main(String[] args) throws Exception{
    Email demo2=new Email();
    String[] mailArray ={"******@qq.com","******@eautosh.com"};
    String subject="冬天来啦!";
    String content="Hello world啊!";
    demo2.sendmail(mailArray,subject,content);
}

}`
3.qq邮件服务器登录密码获取方式；
第一步：登录邮箱，点击设置；

第二步：选择账户；

第三步：开启POP3/SMTP服务，获取密码