JAVAWeb中实现简单邮箱找回密码

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

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">
<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

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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：[email protected]
	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：

JAVAWeb中实现简单邮箱找回密码

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