用户绑定QQ邮箱找回密码

 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("[e-mail]"));       //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("[e-mail]", "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 stubdoPost(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 blockSystem.out.println("验证码发送失败");e.printStackTrace();} catch (MessagingException e) {// TODO Auto-generated catch blocke.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 stubdoPost(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);        }        }}