java 发送邮件 （qq邮箱为例）

1.qq邮箱发送小实例

package com.fanjia.javamail.send;

import javax.mail.*;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeMessage;
import java.util.Properties;

public class SendMail {
    
    
    public static void main(String [] args) {
    
    
        // 收件人电子邮箱
        String to = "[email protected]";
        // 发件人电子邮箱
        String from = "[email protected]";
        // 指定发送邮件的主机为 smtp.qq.com
        String host = "smtp.qq.com";  //QQ 邮件服务器
        // 获取系统属性
        Properties properties = System.getProperties();
        // 设置邮件服务器
        properties.setProperty("mail.smtp.host", host);
        properties.put("mail.smtp.auth", "true");
        // 获取默认session对象
        Session session = Session.getDefaultInstance(properties,new Authenticator(){
    
    
            public PasswordAuthentication getPasswordAuthentication()
            {
    
    
                return new PasswordAuthentication("[email protected]", "xxxxxx"); //发件人邮件用户名、授权码
            }
        });

        try{
    
    
            // 创建默认的 MimeMessage 对象
            MimeMessage message = new MimeMessage(session);
            // Set From: 头部头字段
            message.setFrom(new InternetAddress(from));
            // Set To: 头部头字段
            message.addRecipient(Message.RecipientType.TO, new InternetAddress(to));
            // Set Subject: 头部头字段
            message.setSubject("HELLO");
            // 设置消息体
            message.setText("java");
            // 发送消息
            Transport.send(message);
            System.out.println("发送成功");
        }catch (MessagingException mex) {
    
    
            mex.printStackTrace();
        }
    }
}