Java Mail邮件发送的简单实现

import javax.mail.Authenticator;
import javax.mail.PasswordAuthentication;

public class MyEmailAutherticator extends Authenticator {

    //用户名（登录邮箱）
    private String username;

    //密码
    private String password;

    public MyEmailAutherticator() {
        super();
    }

    //初始化邮箱和密码
    public MyEmailAutherticator(String username, String password) {
        this.username = username;
        this.password = password;
    }

    //用作登录校验，以确保对该邮箱有发送邮件的权利
    public PasswordAuthentication getPasswordAuthentication() {
        return new PasswordAuthentication(username, password);
    }
    
    //set and get method
    public String getUsername() {
        return username;
    }

    public void setUsername(String username) {
        this.username = username;
    }

    public String getPassword() {
        return password;
    }

    public void setPassword(String password) {
        this.password = password;
    }
}

import java.util.Date;
import java.util.Properties;
import javax.mail.Address;
import javax.mail.Authenticator;
import javax.mail.Message;
import javax.mail.SendFailedException;
import javax.mail.Session;
import javax.mail.Transport;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeMessage;

public class Mail {
    
    //发送邮件的帐号和密码
    private String username="abc123456@qq.com";

    private String password="xxxxxx";
    
    private String host = "smtp.qq.com";
    
    private String mail_head_name = "this is head of this mail";
    
    private String mail_head_value = "this is head of this mail";
    
    private String mail_to = "123456789@qq.com";
    
    private String mail_from = "abc123456@qq.com";
    
    private String mail_subject = "this is the subject of this test mail";
    
    private String mail_body = "this is mail_body of this test mail";
    
    private String personalName = "我的邮件";
    
    public void sendMail() throws SendFailedException{
        try {
             //发送邮件的props文件
            Properties props = new Properties();
            // 初始化props
            props.put("mail.smtp.host", host);
            props.put("mail.smtp.auth", "true");
            System.out.println(props);
            
            //进行邮件服务用户认证
            Authenticator auth = new MyEmailAutherticator(username,password);
            
            // 创建session,和邮件服务器进行通讯
            Session session = Session.getDefaultInstance(props,auth);
            
            // 创建mime类型邮件
            MimeMessage message = new MimeMessage(session);
            //设置邮件格式
            message.setContent("Hello","text/html;charset=utf-8");
            // 设置主题
            message.setSubject(mail_subject);
            //设置邮件内容
            message.setText(mail_body);
            //设置邮件标题
            message.setHeader(mail_head_name, mail_head_value);
            message.setSentDate(new Date());//设置邮件发送时期
            Address address = new InternetAddress(mail_from,personalName);
            //设置邮件发送者的地址
            message.setFrom(address);
            
            //======单发邮件======
            //设置邮件接收者的地址
            Address toaddress = new InternetAddress(mail_to);
            // 设置收件人
            message.addRecipient(Message.RecipientType.TO,toaddress);
            
            //======群发邮件======
//            List<String> recipients = new ArrayList<String>();
//            recipients.add("123456789@qq.com");
//            recipients.add("234567890@gmail.com");
//            final int num = recipients.size();
//            InternetAddress[] addresses = new InternetAddress[num];
//            for (int i = 0; i < num; i++) {
//                addresses[i] = new InternetAddress(recipients.get(i));
//            }
//            message.setRecipients(Message.RecipientType.TO, addresses);
            

            System.out.println(message);
            // 发送邮件
            Transport.send(message);
            System.out.println("Send Mail Ok!");
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

public class Test {
    
    public static void main(String[] args) {
        Mail m = new Mail();
        try {
            m.sendMail();
        } catch (Exception e) {
            
        }
    }
}