JavaWeb利用邮箱帮用户找回密码 JavaWeb利用邮箱帮用户找回密码

时间:2021-03-30 学以致用HT 人气:0

本文是介绍在一个小的JAVAWeb项目中，利用邮箱帮用户找回密码。

效果展示

需要一个发送邮件的jar包： javax.mail .jar

1.JSP页面（设置邮箱输入框）

<%@ page language="java" contentType="text/html; charset=UTF-8"
 pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>找回密码-图书管理系统</title>
<link rel="stylesheet" href="bootstrap/css/bootstrap.min.css" rel="external nofollow" >
<script type="text/javascript" src="bootstrap/js/bootstrap.min.js"></script>
</head>
<body>
 <div style="text-align: center" width="300px" height="200px">
 <form action="RetrievePassword.do" method="post">
 
 
  <input type="email" name="email" id="email" width="100px"
  height="60px" style="margin-top: 100px" placeholder="请输入您的邮箱地址"
  required> <br>
  <br>
 
  <button type="submit" class="btn btn-success" id="button"
  width="100px" height="60px">找回密码</button>
 
 </form>
 <br>
 <br>
 
 <button type="button" class="btn btn-primary" id="button"
  onclick="backLogin()" width="100px" height="60px">返回登录页面</button>
 </div>
 <script type="text/javascript">
 function backLogin() {
  window.location.href = "login.jsp"
 }
 </script>
</body>
</html>

2.Servlet代码（根据用户输入的邮箱账号找到用户，并生成发送邮件类的实例，再设置收件人和要发送的内容，最后发送邮件）

/**
 * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
 */
 protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
 //获取用户的邮箱
 String email = request.getParameter("email");
 Admin admin = null;
 User user = null;
 PrintWriter out = response.getWriter();
 //实例化一个发送邮件的对象
 SendMail mySendMail = new SendMail();
 //根据邮箱找到该用户信息
 admin = adminService.getAdminByEmail(email);
 if(admin!=null) {
  //设置收件人和消息内容
  mySendMail.sendMail(email, "图书管理系统提醒，您的密码为："+admin.getPassword());
  out.println("<script>alert('恭喜，找回密码成功');window.location.href='login.jsp'</script>");
 } else {
  user = userService.getUserByEmail(email);
  if(user!=null) {
  mySendMail.sendMail(email, "图书管理系统提醒，您的密码为："+user.getPassword());
  out.println("<script>alert('恭喜，找回密码成功');window.location.href='login.jsp'</script>");
  }
 }
 out.println("<script>alert('该邮箱尚未注册！请重新输入');window.location.href='retrievePassword.jsp'</script>"); 
 }

3.发送邮件类

package com.bookms.util;
 
import javax.mail.MessagingException;
import javax.mail.NoSuchProviderException;
import javax.mail.Session;
import javax.mail.Transport;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeMessage;
import java.util.Date;
import java.util.Properties;
 
public class SendMail {
 
 // 发件人的邮箱账号如：xxx@163.com
 public static String sendEmailAccount = "";
 // 发件人的邮箱的授权码(自己在邮箱服务器中开启并设置)
 public static String sendEmailPassword = "";
 // 发件人邮箱的SMTP服务器地址，如：smtp.163.com
 public static String sendEmailSMTPHost = "smtp.163.com";
 // 收件人的邮箱账号
 public static String receiveMailAccount = "";
 
 // 把发送邮件封装为函数，参数为收件人的邮箱账号和要发送的内容
 public void sendMail(String receiveMailAccount, String mailContent) {
 // 创建用于连接邮件服务器的参数配置
 Properties props = new Properties();
 // 设置使用SMTP协议
 props.setProperty("mail.transport.protocol", "smtp");
 // 设置发件人的SMTP服务器地址
 props.setProperty("mail.smtp.host", sendEmailSMTPHost);
 // 设置需要验证
 props.setProperty("mail.smtp.auth", "true");
 
 // 根据配置创建会话对象, 用于和邮件服务器交互
 Session session = Session.getInstance(props);
 // 设置debug模式，便于查看发送过程所产生的日志
 session.setDebug(true);
 
 try {
  // 创建一封邮件
  MimeMessage message = createMimeMessage(session, sendEmailAccount, receiveMailAccount, mailContent);
 
  // 根据 Session 获取邮件传输对象
  Transport transport = session.getTransport();
 
  transport.connect(sendEmailAccount, sendEmailPassword);
 
  // 发送邮件, 发到所有的收件地址, 通过message.getAllRecipients() 可以获取到在创建邮件对象时添加的所有收件人
  transport.sendMessage(message, message.getAllRecipients());
 
  // 关闭连接
  transport.close();
 } catch (NoSuchProviderException e) {
  // TODO Auto-generated catch block
  e.printStackTrace();
 } catch (MessagingException e) {
  // TODO Auto-generated catch block
  e.printStackTrace();
 } catch (Exception e) {
  // TODO Auto-generated catch block
  e.printStackTrace();
 }
 }
 
 /**
 * 
 * @param session
 *      和服务器交互的会话
 * @param sendMail
 *      发件人邮箱
 * @param receiveMail
 *      收件人邮箱
 * @return
 * @throws Exception
 */
 public static MimeMessage createMimeMessage(Session session, String sendMail, String receiveMail,
  String mailContent) throws Exception {
 // 创建一封邮件
 MimeMessage message = new MimeMessage(session);
 
 // 设置发件人姓名和编码格式
 message.setFrom(new InternetAddress(sendMail, "图书管理系统", "UTF-8"));
 
 // 收件人
 message.setRecipient(MimeMessage.RecipientType.TO, new InternetAddress(receiveMail, "尊敬的用户", "UTF-8"));
 
 // 设置邮件主题
 message.setSubject("找回密码提醒", "UTF-8");
 
 // 设置邮件正文
 message.setContent(mailContent, "text/html;charset=UTF-8");
 
 // 设置发件时间
 message.setSentDate(new Date());
 
 // 保存设置
 message.saveChanges();
 
 return message;
 }
 
}

注意此处用的授权码，需要自己登录邮箱去设置，如163邮箱设置如下：

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