Java发送邮箱验证码、session校验功能

public boolean sendEMail(Map<String, Object> map) {    log.info("子件接口行始！");    String from = Cache.getInstance().getParamsConstant.EMAIL_FROM);    String pwd = Cache.getInstance().getParams(Constant.EMAIL_PWD);    String to = String.valueOf(map.get("mail"));    String subject = String.valueOf(map.get("subject"));    String content = String.valueOf(map.get("content"));    String smtpHost = Cache.getInstance().getParams(Constant.EMAIL_SMTPHOST);    if(StringUtils.isBlank(to) || StringUtils.isBlank(subject) || StringUtils.isBlank(content)){      log.info("件地址（"+to+"）、主（"+subject+"）、容（"+content+"）有空，不符合送件");      return false;    }    try{       Properties props = new Properties();       props.setProperty("mail.transport.protocol", "smtp"); // 使用的协议（JavaMail规范要求）       props.setProperty("mail.smtp.host", smtpHost); // 发件人的邮箱的 SMTP服务器地址       props.setProperty("mail.smtp.auth", "true"); // 请求认证，参数名称与具体实现有关       // 创建Session实例对象       Session session = Session.getDefaultInstance(props);       // 创建MimeMessage实例对象       MimeMessage message = new MimeMessage(session);       // 设置发件人       message.setFrom(new InternetAddress(from));       // 设置收件人       message.setRecipients(Message.RecipientType.TO, InternetAddress.parse(to));       // 设置发送日期       message.setSentDate(new Date());       // 设置邮件主题       message.setSubject(subject);       // 设置纯文本内容的邮件正文       message.setText(content);       // 保存并生成最终的邮件内容       message.saveChanges();       // 设置为debug模式, 可以查看详细的发送 log       session.setDebug(true);       // 获取Transport对象       Transport transport = session.getTransport("smtp");       // 第2个参数需要填写的是QQ邮箱的SMTP的授权码，什么是授权码，它又是如何设置？       transport.connect(from, pwd);       // 发送，message.getAllRecipients() 获取到的是在创建邮件对象时添加的所有收件人, 抄送人, 密送人       transport.sendMessage(message, message.getAllRecipients());       transport.close();    }catch(Exception e){      log.error(e.getMessage(), e);      return false;    }    log.info("子件接口行完成，行成功！");    return true;  }

@RequestMapping("/sendEMail.do")  public void sendEMail(HttpServletRequest request, HttpServletResponse response) {    String json = "{/"success/":false,/"message/":/"操作失败/",/"returnVal/":/"/"}";    boolean res = false;//发送邮件标记     Map<String, Object> map = new HashMap<String, Object>();    try {      String username = request.getParameter("username");      User user = this.userService.findUserByLoginname(username);      if(null == user){        json = "{/"success/":false,/"message/":/"无此人员/",/"returnVal/":/"/"}";        return;      }      //获取当前绑定邮箱地址      String mail = user.getEmail();      //验证邮箱地址      if(StringUtils.isBlank(mail) || "null".equals(mail)){        json = "{/"success/":false,/"message/":/"当前用户尚未绑定邮箱/",/"returnVal/":/"/"}";        return;      }      //生成验证码      String checkcode = Common.getCode();      //发送验证码      String _debug = Cache.getInstance().getParams(Constant.UIAS_DEBUG);      if("1".equals(_debug)){//调试模式 不真发送 直接回显        map.put("checkcode", checkcode);        res = true;      }else{//非调试模式 真实发送邮件        //验证是否频繁发送验证码请求  单位 秒        String intervalTime = Cache.getInstance().getParams(Constant.EMAIL_INTERVAL_TIME);        Object emailTimeFlag = request.getSession().getAttribute("emailTimeFlag");        boolean checkTime = true;        if (emailTimeFlag != null) {          int miao = (int) (((new Date()).getTime() - (Long) emailTimeFlag) / 1000);          if (miao <= Integer.parseInt(intervalTime)) {            checkTime=false;          }         }         if(checkTime){          //组装数据          String email_validity = Cache.getInstance().getParams(Constant.EMAIL_VALIDITY);          String vartime= String.valueOf((Integer.parseInt(email_validity)/60000));          String content = Cache.getInstance().getParams(Constant.EMAIL_CONTENT);          String subject = Cache.getInstance().getParams(Constant.EMAIL_SUBJECT);          content = content.replaceAll("//$code", checkcode);          content = content.replaceAll("//$time",vartime);          map.put("mail", mail);          map.put("subject", subject);          map.put("content", content);          //调用发送          res = ieMailService.sendEMail(map);        }else{          json = "{/"success/":false,/"message/":/"请耐心等待，不要频繁发送验证码申请/",/"returnVal/":/"/"}";          return;        }      }      //发送成功后续操作      if(res){        //把验证时间放在session里        request.getSession().setAttribute("emailTimeFlag", new Date().getTime());        //把验证码放在session里  md5 2次加密验证码        String codeMd5 = DigestUtils.md5Hex((DigestUtils.md5Hex(checkcode).toLowerCase()));        request.getSession().setAttribute("emailCodeFlag", codeMd5);        if("1".equals(_debug)){          json = "{/"success/":true,/"message/":/"邮箱验证码发送成功，已经待填到验证码框！/",/"returnVal/":/"/",/"checkcode/":/""+checkcode+"/"}";        }else{          json = "{/"success/":true,/"message/":/"邮箱验证码发送成功，请查收邮件！/",/"returnVal/":/"/"}";        }      }    } catch (Exception e) {      logger.error("发送邮件验证码异常", e);    }finally{      renderHtml(response, json, "encoding:UTF-8");    }  }

@RequestMapping("/check.do")  public void check(HttpServletRequest request, HttpServletResponse response) {    String json = "{/"success/":false,/"message/":/"操作失败/",/"returnVal/":/"/"}";    try {      //验证码有效期校验      String email_validity = Cache.getInstance().getParams(Constant.EMAIL_VALIDITY);      Object emailTimeFlag = request.getSession().getAttribute("emailTimeFlag");      if (emailTimeFlag != null) {        int miao = (int) (((new Date()).getTime() - (Long) emailTimeFlag) / 1000);        if (miao >= Integer.parseInt(email_validity)) {          json = "{/"success/":false,/"message/":/"验证码已过有效期，请重新获取！/",/"returnVal/":/"/"}";        }else{          //在有效期内 比对验证码准确性          String checkcode = request.getParameter("checkcode");          // md5 2次加密验证码          String codeMd5 = DigestUtils.md5Hex((DigestUtils.md5Hex(checkcode).toLowerCase()));          Object emailCodeFlag = request.getSession().getAttribute("emailCodeFlag");          boolean res = codeMd5.equals(String.valueOf(emailCodeFlag));          if(res){            json = "{/"success/":true,/"message/":/"验证码通过！/",/"returnVal/":/"/"}";          }else{            json = "{/"success/":false,/"message/":/"验证码不匹配，请重新核对！/",/"returnVal/":/"/"}";          }        }      }     } catch (Exception e) {      logger.error("验证码异常", e);    }finally{      renderHtml(response, json, "encoding:UTF-8");    }  }

// 括号表示组，被替换的部分$n表示第n组的内容        mail = mail.replaceAll("(//w?)(//w+)(//w)(@//w+//.[a-z]+(//.[a-z]+)?)", "$1****$3$4");// 括号表示组，被替换的部分$n表示第n组的内容        phone = phone.replaceAll("(//d{3})//d{4}(//d{4})", "$1****$2");

 <input id="btnMail" type="button" onclick="start_mail_button();" value="获取邮件验证码" />

//获取邮箱验证码function start_mail_button(){  var username = $('#username').val().trim();//用名  if('' == username){    ErrorMsg("请输入用户名");    return;  }  $.ajax({    url: basePath+'/sendEMail.do',type: 'post',dataType: 'json',    data: {username: username},    success: function(data){      if(data.success){        SuccMsg(data.message);        //页面获取验证码按钮样式处理         $("#btnMail").attr('disabled','disabled');         var count = 1 ;         var sum = 60;         var i = setInterval(function(){          if(count > 60){           $("#btnMail").attr('disabled',false);           $("#btnMail").val("获取邮箱验证码");           clearInterval(i);          }else{           $("#btnMail").val("剩余"+parseInt(sum - count)+'秒');          }          count++;         },1000);         //debug模式待填         if(data.checkcode){           $("#checkcode").val(data.checkcode);         }      }else{        ErrorMsg("获取失败！"+data.message);      }    }  });  }