35-网站实现邮件发送

最新推荐文章于 2024-06-16 13:58:30 发布

原创最新推荐文章于 2024-06-16 13:58:30 发布

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这篇博客展示了如何在Java Web应用中实现邮件发送功能。通过使用JavaMail API和QQ邮箱SMTP服务，用户在注册时可以接收到确认邮件。邮件内容包含用户名和密码，以确保注册成功并提供安全信息。代码包括JSP表单、实体类、邮件发送工具类以及Servlet处理注册请求。

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网站实现邮件发送

导相关的包

index.jsp

<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
  <head>
    <title>$Title$</title>
  </head>
  <body>


  <form action="${pageContext.request.contextPath}/RegisterServlet.do" method="post">
    用户名：<input type="text" name="username"> <br>
    密码：<input type="password" name="password"><br>
    邮箱：<input type="text" name="email"><br>
    <input type="submit" value="注册">
  </form>


  </body>
</html>

实体类

public class User implements Serializable {
    private String username;
    private String password;
    private String email;
//getter setter toString 有参无参
}

utils

package com.tian.utils;

import com.sun.mail.util.MailSSLSocketFactory;
import com.tian.pojo.User;

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

public class Sendmail extends Thread{
    private String from="QQ号@qq.com";
    private String username="QQ号@qq.com";
    private String password="授权码";
    private String host="smtp.qq.com";
    private User user;
    public Sendmail(User user){
        this.user=user;
    }

    @Override
    public void run() {
 try {
     Properties prop = new Properties();
     prop.setProperty("mail.host","smtp.qq.com");//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，加上以下代码即可 大厂，其他邮箱不需要！
     MailSSLSocketFactory sf = new MailSSLSocketFactory();
     sf.setTrustAllHosts(true);
     prop.put("mail.smtp.ssl.enable","true");
     prop.put("mail.smtp.ssl.sockeFactory",sf);
     //使用javaMail发送邮件的五个步骤

     //1.创建定义整个应用程序所需的环境信息的session对象
     //qq才有!其他邮箱就不用
     Session session=Session.getDefaultInstance(prop, new Authenticator() {
         @Override
         protected PasswordAuthentication getPasswordAuthentication() {
             return new PasswordAuthentication("QQ号@qq.com","授权码");
         }
     });
     //2.通过session得到transport对象
     Transport ts = session.getTransport();
     //3.使用邮箱的用户名和授权码连上邮件服务器
     ts.connect(host,username,password);
     //4.创建邮件:写邮件
     MimeMessage message = new MimeMessage(session);
     message.setFrom(new InternetAddress(from));
     message.setRecipient(Message.RecipientType.TO,new InternetAddress(user.getEmail()));
     message.setSubject("用户注册邮件");
     //邮件的文本内容
    String info="用户注册成功，您的用户名："+user.getUsername()+"您的密码："+user.getPassword();
    message.setContent(info,"text/html;charset=UTF-8");
    message.saveChanges();
    //5.发送邮件
     ts.sendMessage(message,message.getAllRecipients());
     ts.close();

 }catch (Exception e){
     throw new RuntimeException(e);
 }

   }
}

RegisterServlet

package com.tian.servlet;

import com.tian.pojo.User;
import com.tian.utils.Sendmail;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;

public class RegisterServlet extends HttpServlet {
    @Override
    protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {

        String username = req.getParameter("username");
        String password = req.getParameter("password");
        String email = req.getParameter("email");
        System.out.println(1111);
        User user = new User(username, password, email);
        //当用户注册成功之后，给用户发送一封邮件
        //我们使用线程来专门发送邮件，防止出现耗时，和网站注册人数过多的情况
        Sendmail send = new Sendmail(user);
        send.start();

        req.setAttribute("message","注册成功，我们已经发了一封电子邮件，注意查收");
        req.getRequestDispatcher("info.jsp").forward(req,resp);
    }
}

注册到web.xml

info.jsp

<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
    <title>Title</title>
</head>
<body>
${message}
</body>
</html>