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

2. 工具類；
   `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";   //郵件伺服器登入使用者名稱

private static final String MAIL_PASSWORD = "bybtfpssyfvahrbeid";   //郵件伺服器登入密碼

private static final String MAIL_FROM_SMTP = "[email protected]";  //傳送郵件地址

public void sendmail(String[] mailArray,String subject,String content){
    Properties props = new Properties();
    //設定伺服器驗證
    props.setProperty("mail.smtp.auth", "true");
    //設定傳輸協議
    props.setProperty("mail.transport.protocol", "smtp");
    //選擇服務型別
    props.setProperty("mail.host", "smtp.qq.com");
    //通過認證建立一個session例項
    Session session = Session.getInstance(props,
            new Authenticator()
            {
                protected PasswordAuthentication getPasswordAuthentication()
                {
                    return new PasswordAuthentication(MAIL_USER,MAIL_PASSWORD);
                }
            }
    );
    //顯示郵件傳送過程中的互動資訊
    session.setDebug(true);

    Message msg = new MimeMessage(session);
    Transport transport=null;
    try {
        //郵件傳送人
        msg.setFrom(new InternetAddress(MAIL_FROM_SMTP));
        //郵件主題
        msg.setSubject(subject);
        //郵件內容
        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]);
        }
        //郵件接收方
        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="冬天來啦!";
    String content="Hello world啊!";
    demo2.sendmail(mailArray,subject,content);
}
 

}`
3.qq郵件伺服器登入密碼獲取方式；
第一步：登入郵箱，點選設定；

第二步：選擇賬戶；

第三步：開啟POP3/SMTP服務，獲取密碼