【无标题】通过邮箱注册账号，邮箱返回注册信息

1. 编写前端代码

<form action="${pageContext.request.contextPath}/rg" 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"><br/>
  form>

2. .xml文件配置

<servlet>
        <servlet-name>MailWebservlet-name>
        <servlet-class>com.wang.web.MailWebservlet-class>
    servlet>
    <servlet-mapping>
        <servlet-name>MailWebservlet-name>
        <url-pattern>/rgurl-pattern>
    servlet-mapping>

3. 编写MailWeb

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");
        User user=new User(username,password,email);
        SendMail sendMail=new SendMail(user);
        sendMail.start();
        //注册用户
        req.setAttribute("message","稍等，马上收到邮件");
        req.getReq

4. 编写User类

package com.wang.rea;

public class User{
    String username;
    String password;
    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 String getPassword() {
        return password;
    }

    public String getEmail() {
        return email;
    }

    public void setUsername(String username) {
        this.username = username;
    }

    public void setPassword(String password) {
        this.password = password;
    }

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

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

5. 编写线程类，控制邮件发送

 // 给用户发送邮件的邮箱
    private String from = "[email protected]";
    // 邮箱的用户名
    private String username = "[email protected]";
    // 邮箱授权码
    private String password = "rqkvkhrzhprrdiac";
    // 发送邮件的服务器地址，QQ服务器
    private String host = "smtp.qq.com";
    // 接收人邮箱
    private String to = "[email protected]";
    // 邮件主题
    private String title = "注册邮件";
    private User user;
    public SendMail(User user){
        this.user=user;
    }

    @Override
    public void run() {
        try {
            // 使用QQ邮箱时配置
            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");      // 需要验证用户名和密码

            // 关于QQ邮箱，还要设置SSL加密，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.socketFactory", sf);

            // 创建定义整个邮件程序所需的环境信息的 Session 对象，QQ才有，其他邮箱就不用了
            Session session = Session.getDefaultInstance(prop, new Authenticator() {
                @Override
                protected PasswordAuthentication getPasswordAuthentication() {
                    // 发件人邮箱用户名，授权码
                    return new PasswordAuthentication(username, password);
                }
            });

            // 开启 Session 的 debug 模式，这样就可以查看程序发送 Email 的运行状态
            session.setDebug(true);

            // 通过 session 得到 transport 对象
            Transport ts = session.getTransport();

            // 使用邮箱的用户名和授权码连上邮箱服务器
            ts.connect(host, username, password);

            // 创建邮件，写邮件
            // 需要传递 session
            MimeMessage message = new MimeMessage(session);
            message.setFrom(new InternetAddress(from)); // 指明邮件的发件人
            message.setRecipient(Message.RecipientType.TO, new InternetAddress(user.getEmail()));   // 指明邮件的收件人
            message.setSubject(title);     // 邮件主题
            String info="恭喜您，注册成功\n"+"您的账号为："+user.getUsername()+"您的密码是："+user.getPassword()+"您的邮箱是："+user.getEmail();
            message.setContent(info,"text/html;charset=utf-8");
            message.saveChanges();
            // 释放资源
            //发送邮件
            ts.sendMessage(message,message.getAllRecipients());
            ts.close();
        }
        catch (Exception e){
            e.printStackTrace();
        }