JavaWeb利用邮箱帮用户找回密码

2019-11-26 09:17:12

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来源：转载

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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：