用java实现发送邮箱以qq邮箱为例

1.0 开发环境

开发工具 idea
额外jar包 mail.jar

jar包的maven地址

    <!-- https://mvnrepository.com/artifact/javax.mail/javax.mail-api -->
    <dependency >
      <groupId >com.sun.mail </groupId >
      <artifactId >javax.mail </artifactId >
      <version >1.5.4 </version >
    </dependency >

代码如下：

package com.ccut.base.util;

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

/**
 * Created by admin on 2018/6/24.
 */
public class SendMail {
    public SendMail(){
        //做链接前的准备工作  也就是参数初始化
        Properties properties = new Properties();
        properties.setProperty("mail.smtp.host","smtp.qq.com");//发送邮箱服务器
        properties.setProperty("mail.smtp.port","465");//发送端口
        properties.setProperty("mail.smtp.auth","true");//是否开启权限控制
        properties.setProperty("mail.debug","true");//true 打印信息到控制台
        properties.setProperty("mail.transport","smtp");//发送的协议是简单的邮件传输协议
        properties.setProperty("mail.smtp.ssl.enable","true");
        //建立两点之间的链接
        System.out.println("执行了2");
        Session session = Session.getInstance(properties, new Authenticator() {
            @Override
            protected PasswordAuthentication getPasswordAuthentication() {
                return new PasswordAuthentication("[email protected]","xxxxxdfda");
            }
        });
        System.out.println("执行了3");
        //创建邮件对象
        Message message = new MimeMessage(session);
        //设置发件人
        try {
            message.setFrom(new InternetAddress("[email protected]"));

        //设置收件人
        message.setRecipient(Message.RecipientType.TO,new InternetAddress("[email protected]"));//收件人
        //设置主题
        message.setSubject("验证码");
        //设置邮件正文  第二个参数是邮件发送的类型
        message.setContent("2569658","text/html;charset=UTF-8");
        //发送一封邮件
            Transport transport = session.getTransport();
            transport.connect("[email protected]","xxxxxda");
            Transport.send(message);
            System.out.println("执行了");
    } catch (MessagingException e) {
        e.printStackTrace();
    }finally {

        }

    }

    public static void main(String[] args) {
        System.out.println("执行了1");
        SendMail SendMail = new SendMail();
    }
}