实战：网站注册通知邮件

网站注册通知邮件

index.jsp

<html>
<body>

<h2>Hello World!</h2>
<form action="${pageContext.request.contextPath}/RegisterServlet.do" method="post">
    用户名：<input type="text" name="username">
    密码：<input type="text" name="pwd">
    邮箱：<input type="text" name="email">
    <input type="submit" value="注册">

</form>
</body>
</html>

网页跳转温馨提示

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


<h1>小韩网站温馨提示</h1>
${message}

</body>
</html>

实体类

public class User {
    private String username;
    private String password;
    private String email;
public User() {
}

public User(String username, String password, String email) {
    this.username = username;
    this.password = password;
    this.email = email;
}

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;
}

public String getEmail() {
    return email;
}

public void setEmail(String email) {
    this.email = email;
}

@Override
public String toString() {
    return "User{" +
            "username='" + username + '\'' +
            ", password='" + password + '\'' +
            ", email='" + email + '\'' +
            '}';
	}
}

web.xml注册

  <servlet>
    <servlet-name>RegisterServlet</servlet-name>
    <servlet-class>cn.csn.MailDemo01.servlet.RegisterServlet</servlet-class>
  </servlet>
  <servlet-mapping>
    <servlet-name>RegisterServlet</servlet-name>
    <url-pattern>/RegisterServlet.do</url-pattern>
  </servlet-mapping>

servlet

package WebMail.servlet;

import WebMail.pojo.User;
import WebMail.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 doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        String username=req.getParameter("username");
        String password=req.getParameter("pwd");
        String email=req.getParameter("email");
        System.out.println(username);
        System.out.println(password);
        System.out.println(email);

        User user=new User(username,password,email);
        //用户注册成功之后，给户发送一封邮件
        //我们使用线程米专门发送邮件，防止出现耗时，和网站注册人数过多的情况;
        SendMail send=new SendMail(user);
        //启动线程，线程启动之后就会执行run方法来发送邮件
        send.start();
        //注册用户
        req.setAttribute("message","注册成功！我们已经发了一封带了注册信息的电子邮件，请查收!如网络不稳定，可能过会儿才能收到!");
        req.getRequestDispatcher("info.jsp") . forward(req, resp);

    }

    @Override
    protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
        doGet(req, resp);
    }
}

邮件发送类

package WebMail.utils;

//网站三秒原则：用户体验
//多线程实现用户体验！（异步处理）


import WebMail.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;

public class SendMail extends Thread {
    private String from="2556405756@qq.com";

    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",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");//需要验证用户密码
            //QQ邮箱需要设置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.创建定义整个应用程序所需要的环境信息的session对象
            Session session= Session.getDefaultInstance(prop, new Authenticator() {
                @Override
                protected PasswordAuthentication getPasswordAuthentication() {
                    return new PasswordAuthentication(from,"bkvljakefgyydijg");
                }
            });
            //开启session的debug模式，这样可以查看到程序发送Email的运行状态
            session.setDebug(true);
            //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,from,"bkvljakefgyydijg");
            //4.创建邮件：写文件
            //注意需要传递session
            MimeMessage message=new MimeMessage(session);
            //指明邮件的发件人
            message.setFrom(new InternetAddress(from));
            //指明邮件的收件人
            message.setRecipient(Message.RecipientType.TO,new InternetAddress(user.getEmail()));
            //邮件标题
            message.setSubject("注册通知");
            //邮件的文本内容
            String info = "恭喜您注册成功，您的用户名:"+ user.getUsername() + ",您的密码: " + user.getPassword() + ",请妥善保管，如有问题请联系网站客服!!";
            message.setContent(info,"text/html ;charset=UTF-8");
            message.saveChanges();

            //5.发送邮件
            System.out.println("开始发送");
            ts.sendMessage(message,message.getAllRecipients());
            //6.关闭连接
            System.out.println("发送成功");
            ts.close();
        }catch (Exception e){
            System.out.println(e);
            throw new RuntimeException(e);

        }

    }
}

引入多线程的目的是为了提高用户的体验，防止因发送文件时间过长，导致前端响应过久，因此这里采用异步响应。

posted @ 2022-07-16 15:07  hanyuya  阅读(77)  评论(0)    收藏  举报