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[Java] JavaWeb利用邮箱帮用户找回密码

编程语言 编程语言 发布于:2021-10-05 16:05 | 阅读数:402 | 评论:0

这篇文章主要为大家详细介绍了JavaWeb利用邮箱帮用户找回密码,具有一定的参考价值,感兴趣的小伙伴们可以参考一下
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   
DSC0000.png

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 width="300px" height="200px">
 <form action="retrievepassword.do" method="post">
 
 
  <input type="email" name="email" id="email" width="100px"
  height="60px" 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"
   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:
DSC0001.jpg


以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持CodeAE代码之家
原文链接:https://blog.csdn.net/qq_40348465/article/details/83629000

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