准备工作
发送邮件需要获得协议和支持! 开启服务 POP3/SMTP 服务
如何开启 POP3/SMTP 服务：/weixin_44953227/article/details/112562613
依赖
mail.jar：/maven2/javax/mail/mail/1.4.7/mail-1.4.7.jar
activation.jar： /maven2/javax/activation/activation/1.1.1/activation-1.1.1.jar
Maven
<!-- /artifact/javax.mail/mail --><dependency><groupId>javax.mail</groupId><artifactId>mail</artifactId><version>1.4.7</version></dependency><!-- /artifact/javax.activation/activation --><dependency><groupId>javax.activation</groupId><artifactId>activation</artifactId><version>1.1.1</version></dependency>
封装邮件发送工具类
使用
// User user = new User("收件人用户名", "收件人密码", "收件人邮箱");User user = new User(username, password, email);// 用户注册成功, 使用线程来发送邮件, 防止阻塞SendMail sendMail = new SendMail(user);sendMail.start();
工具类
package com.pro.utils;import com.pro.pojo.User;import com.sun.mail.util.MailSSLSocketFactory;import javax.mail.*;import javax.mail.internet.InternetAddress;import javax.mail.internet.MimeMessage;import java.util.Properties;// 网站三秒原则public class SendMail extends Thread {// 发送邮件的邮箱private String from = "33344466@";// 邮箱用户名private String username = "33344466@";// 授权码private String password = "absasyncawait";// 发送邮件的服务器地址private String host = "";private User user;public SendMail(User user) {this.user = user;}@Overridepublic void run() {try {Properties prop = new Properties();prop.setProperty("mail.host", host); // 设置qq邮件服务器prop.setProperty("mail.transport.protocol", "smtp"); // 邮件发送协议prop.setProperty("mail.smtp.auth", "true"); // 需要验证用户名密码// 关于qq邮箱, 还要设置SSL加密MailSSLSocketFactory sf = new MailSSLSocketFactory();sf.setTrustAllHosts(true);prop.put("mail.smtp.ssl.enable", "true");prop.put("mail.smtp.ssl.socketFactory", sf);// 使用 JavaMail 发送邮件的5个步骤// 1. 定义整个应用程序所需要的环境信息的 Session 对象// 这一步是qq邮箱才有, 其他邮箱不用Session session = Session.getDefaultInstance(prop, new Authenticator() {@Overridepublic PasswordAuthentication getPasswordAuthentication() {// 发件人邮箱 用户名和授权码return new PasswordAuthentication(username, password);}});// 开启 Session debugger 模式, 可以看到邮件发送的运行状态session.setDebug(true);// 2. 通过 Session得到 transport 对象Transport transport = session.getTransport();// 3. 使用邮箱用户名和授权码连上邮件服务器 (登陆)transport.connect(host, username, password);// 4. 创建邮件: 写邮件MimeMessage message = new MimeMessage(session);// ======== 写邮件 ========// 设置邮件的发件人message.setFrom(new InternetAddress(from));// 设置邮件的收件人message.setRecipient(Message.RecipientType.TO,new InternetAddress(user.getEmail()));// 邮件标题message.setSubject("用户注册通知");// 邮件文本内容String content = "<div>" +"<span>恭喜你注册成功，你的用户名是：" +user.getEmail() +"，你的密码是：" +user.getPassword() +"，请妥善保管。</span>" +"<a href='/' target='_blank'>" +"<img width='100%' src='/70cFv8Sh_Q1YnxGkpoWK1HF6hhy/it/u=2672619668,2196295127&fm=26&gp=0.jpg' />" +"</a>" +"<h4 style='color: red'>This email is sent from Java, 本邮件由Java程序发送, from to 33344466</h4>" +"</div>";message.setContent(content, "text/html; charset=UTF-8");// ======== 写邮件 ========// 5. 发送邮件transport.sendMessage(message, message.getAllRecipients());// 关闭连接transport.close();} catch (Exception e) {e.printStackTrace();throw new RuntimeException();}}}
