其找回密码的流程如下：

第一步：输入用户名，系统查找是否存在该用户，如果存在则进行下一步，并给出用户的邮箱；否则提示"不存在该用户"

第二步：存在该用户后，则进行用户的邮箱验证，每个用户绑定一个QQ邮箱，点击"发送验证码"按钮，系统会给该邮箱发送一条包含验证码的邮件，发送成功，系统会在前端显示"验证码已经发送到你的邮箱，请查看"。用户填入该验证码，并且两者相匹配，则可以进行下一步，否则无法进行下一步，会提示"输入的邮箱验证码错误"

第三步：查看邮箱收到的邮件，复制验证码，填入系统第二步框中，进行第三步验证。通过前两步的验证，已经可以验证，操作者就是本人，所以第三步，用户可以直接修改密码，覆盖原密码

第四步：成功找回密码，是一个新的密码，用户可以返回登录页面进行登录

部分源码：

MailUtil.java(发送邮件工具类)

package com.utils; import java.util.Properties; import javax.mail.Message; import javax.mail.MessagingException; import javax.mail.Session; import javax.mail.Transport; import javax.mail.internet.AddressException; import javax.mail.internet.InternetAddress; import javax.mail.internet.MimeMessage; import javax.mail.internet.MimeMessage.RecipientType; /* * 管理员发送邮件的配置类 * 作者：海哥 * 时间：2017年8月20日 */ public class MailUtil { public void SendMessage(String receiver, String title, String content) throws AddressException,MessagingException{ Properties properties = new Properties(); properties.put("mail.transport.protocol", "smtp");// 连接协议 properties.put("mail.smtp.host", "smtp.qq.com");// 主机名 properties.put("mail.smtp.port", 465);// 端口号 properties.put("mail.smtp.auth", "true"); properties.put("mail.smtp.ssl.enable", "true");//设置是否使用ssl安全连接 ---一般都使用 properties.put("mail.smtp.socketFactory.class", "javax.net.ssl.SSLSocketFactory"); properties.put("mail.smtp.socketFactory.port", "465"); properties.put("mail.debug", "true");//设置是否显示debug信息 true 会在控制台显示相关信息 //得到回话对象 Session session = Session.getInstance(properties); // 获取邮件对象 Message message = new MimeMessage(session); //设置发件人邮箱地址 message.setFrom(new InternetAddress("linhaiyun4571@qq.com")); //设置收件人地址 message.setRecipients(RecipientType.TO,new InternetAddress[] { new InternetAddress(receiver) }); //设置邮件标题 message.setSubject(title); //设置邮件内容 message.setText(content); //得到邮差对象 Transport transport = session.getTransport(); //连接自己的邮箱账户 transport.connect("linhaiyun4571@qq.com", "输入你自己的授权码");//密码为刚才得到的授权码 //发送邮件 transport.sendMessage(message, message.getAllRecipients()); System.out.println("邮件正在发送!"); } }
SendMessage.java(触发发送邮件的控制类)

package com.servlet; import java.io.IOException; import javax.mail.MessagingException; import javax.mail.internet.AddressException; import javax.servlet.ServletException; import javax.servlet.annotation.WebServlet; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import com.bean.User; import com.utils.MailUtil; @WebServlet("/SendMessage") public class SendMessage extends HttpServlet { private static final long serialVersionUID = 1L; public SendMessage() { super(); // TODO Auto-generated constructor stub } protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { // TODO Auto-generated method stub doPost(request, response); } protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { // TODO Auto-generated method stub //设置编码 request.setCharacterEncoding("utf-8"); response.setCharacterEncoding("utf-8"); response.setHeader("Content-Type","text/html; charset=utf-8"); try { MailUtil mail = new MailUtil(); int num = (int)((Math.random()*9+1)*100000); //生成六位验证码随机数 request.getSession().setAttribute("num", num); //设置东西保存验证码 User user = (User) request.getSession().getAttribute("finduser"); //得到修改密码对象的Object String receiver = user.getUser_mail(); String title = "员工找回密码"; String content = "这是高级验证系统发来的邮件，你正在执行该系统找回密码的操作，你的邮箱验证码为："+ String.valueOf(num) + ",请不要告诉别人哦！"; mail.SendMessage(receiver, title, content); request.getSession().setAttribute("success","验证码已经发送到你的邮箱，请查看！"); //设置东西保存验证码 } catch (AddressException e) { // TODO Auto-generated catch block System.out.println("验证码发送失败"); e.printStackTrace(); } catch (MessagingException e) { // TODO Auto-generated catch block e.printStackTrace(); } request.getRequestDispatcher("SecondSteps.jsp").forward(request, response); } }
Validation.java(邮箱验证码匹配验证)

package com.servlet; import java.io.IOException; import javax.servlet.ServletException; import javax.servlet.annotation.WebServlet; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import com.bean.User; @WebServlet("/Validation") public class Validation extends HttpServlet { private static final long serialVersionUID = 1L; public Validation() { super(); // TODO Auto-generated constructor stub } protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { // TODO Auto-generated method stub doPost(request, response); } protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { // TODO Auto-generated method stub //设置编码 request.setCharacterEncoding("utf-8"); response.setCharacterEncoding("utf-8"); response.setHeader("Content-Type","text/html; charset=utf-8"); String email = request.getParameter("email"); String fycodes = request.getParameter("fycodes"); //邮箱验证码 int code = Integer.parseInt(fycodes); //字符串转换为整形 int num = (int) request.getSession().getAttribute("num"); //得到刚发送的邮箱验证码 System.out.println("你的邮箱验证码为："+num); if(code == num){ //判断输入的验证码是否和邮箱收到的一致 System.out.println("验证成功！"); // request.getSession().removeAttribute("num"); request.getSession().removeAttribute("success"); request.getRequestDispatcher("ThirdSteps.jsp").forward(request, response); } else{ request.getSession().setAttribute("ValidaError", "输入的邮箱验证码错误！"); //设置东西保存验证码 request.getRequestDispatcher("SecondSteps.jsp").forward(request, response); } } }