JavaWeb利用郵箱幫用戶(hù)找回密碼

更新時(shí)間：2019年02月10日 10:51:20 作者：學(xué)以致用HT

這篇文章主要為大家詳細(xì)介紹了JavaWeb利用郵箱幫用戶(hù)找回密碼，具有一定的參考價(jià)值，感興趣的小伙伴們可以參考一下

本文是介紹在一個(gè)小的JAVAWeb項(xiàng)目中，利用郵箱幫用戶(hù)找回密碼。

效果展示

需要一個(gè)發(fā)送郵件的jar包： javax.mail .jar

1.JSP頁(yè)面（設(shè)置郵箱輸入框）

<%@ page language="java" contentType="text/html; charset=UTF-8"
 pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>找回密碼-圖書(shū)管理系統(tǒng)</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="請(qǐng)輸入您的郵箱地址"
  required> <br>
  <br>
 
  <button type="submit" class="btn btn-success" id="button"
  width="100px" height="60px">找回密碼</button>
 
 </form>
 <br>
 <br>
 
 <button type="button" class="btn btn-primary" id="button"
  onclick="backLogin()" width="100px" height="60px">返回登錄頁(yè)面</button>
 </div>
 <script type="text/javascript">
 function backLogin() {
  window.location.href = "login.jsp"
 }
 </script>
</body>
</html>

2.Servlet代碼（根據(jù)用戶(hù)輸入的郵箱賬號(hào)找到用戶(hù)，并生成發(fā)送郵件類(lèi)的實(shí)例，再設(shè)置收件人和要發(fā)送的內(nèi)容，最后發(fā)送郵件）

/**
 * @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)
 */
 protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
 //獲取用戶(hù)的郵箱
 String email = request.getParameter("email");
 Admin admin = null;
 User user = null;
 PrintWriter out = response.getWriter();
 //實(shí)例化一個(gè)發(fā)送郵件的對(duì)象
 SendMail mySendMail = new SendMail();
 //根據(jù)郵箱找到該用戶(hù)信息
 admin = adminService.getAdminByEmail(email);
 if(admin!=null) {
  //設(shè)置收件人和消息內(nèi)容
  mySendMail.sendMail(email, "圖書(shū)管理系統(tǒng)提醒，您的密碼為："+admin.getPassword());
  out.println("<script>alert('恭喜，找回密碼成功');window.location.href='login.jsp'</script>");
 } else {
  user = userService.getUserByEmail(email);
  if(user!=null) {
  mySendMail.sendMail(email, "圖書(shū)管理系統(tǒng)提醒，您的密碼為："+user.getPassword());
  out.println("<script>alert('恭喜，找回密碼成功');window.location.href='login.jsp'</script>");
  }
 }
 out.println("<script>alert('該郵箱尚未注冊(cè)！請(qǐng)重新輸入');window.location.href='retrievePassword.jsp'</script>"); 
 }

3.發(fā)送郵件類(lèi)

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 {
 
 // 發(fā)件人的郵箱賬號(hào)如：xxx@163.com
 public static String sendEmailAccount = "";
 // 發(fā)件人的郵箱的授權(quán)碼(自己在郵箱服務(wù)器中開(kāi)啟并設(shè)置)
 public static String sendEmailPassword = "";
 // 發(fā)件人郵箱的SMTP服務(wù)器地址，如：smtp.163.com
 public static String sendEmailSMTPHost = "smtp.163.com";
 // 收件人的郵箱賬號(hào)
 public static String receiveMailAccount = "";
 
 // 把發(fā)送郵件封裝為函數(shù)，參數(shù)為收件人的郵箱賬號(hào)和要發(fā)送的內(nèi)容
 public void sendMail(String receiveMailAccount, String mailContent) {
 // 創(chuàng)建用于連接郵件服務(wù)器的參數(shù)配置
 Properties props = new Properties();
 // 設(shè)置使用SMTP協(xié)議
 props.setProperty("mail.transport.protocol", "smtp");
 // 設(shè)置發(fā)件人的SMTP服務(wù)器地址
 props.setProperty("mail.smtp.host", sendEmailSMTPHost);
 // 設(shè)置需要驗(yàn)證
 props.setProperty("mail.smtp.auth", "true");
 
 // 根據(jù)配置創(chuàng)建會(huì)話(huà)對(duì)象, 用于和郵件服務(wù)器交互
 Session session = Session.getInstance(props);
 // 設(shè)置debug模式，便于查看發(fā)送過(guò)程所產(chǎn)生的日志
 session.setDebug(true);
 
 try {
  // 創(chuàng)建一封郵件
  MimeMessage message = createMimeMessage(session, sendEmailAccount, receiveMailAccount, mailContent);
 
  // 根據(jù) Session 獲取郵件傳輸對(duì)象
  Transport transport = session.getTransport();
 
  transport.connect(sendEmailAccount, sendEmailPassword);
 
  // 發(fā)送郵件, 發(fā)到所有的收件地址, 通過(guò)message.getAllRecipients() 可以獲取到在創(chuàng)建郵件對(duì)象時(shí)添加的所有收件人
  transport.sendMessage(message, message.getAllRecipients());
 
  // 關(guān)閉連接
  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
 *      和服務(wù)器交互的會(huì)話(huà)
 * @param sendMail
 *      發(fā)件人郵箱
 * @param receiveMail
 *      收件人郵箱
 * @return
 * @throws Exception
 */
 public static MimeMessage createMimeMessage(Session session, String sendMail, String receiveMail,
  String mailContent) throws Exception {
 // 創(chuàng)建一封郵件
 MimeMessage message = new MimeMessage(session);
 
 // 設(shè)置發(fā)件人姓名和編碼格式
 message.setFrom(new InternetAddress(sendMail, "圖書(shū)管理系統(tǒng)", "UTF-8"));
 
 // 收件人
 message.setRecipient(MimeMessage.RecipientType.TO, new InternetAddress(receiveMail, "尊敬的用戶(hù)", "UTF-8"));
 
 // 設(shè)置郵件主題
 message.setSubject("找回密碼提醒", "UTF-8");
 
 // 設(shè)置郵件正文
 message.setContent(mailContent, "text/html;charset=UTF-8");
 
 // 設(shè)置發(fā)件時(shí)間
 message.setSentDate(new Date());
 
 // 保存設(shè)置
 message.saveChanges();
 
 return message;
 }
 
}

注意此處用的授權(quán)碼，需要自己登錄郵箱去設(shè)置，如163郵箱設(shè)置如下：