servlet中无法获取jsp中的用户注册信息,求助大神

无法获取其中的username,其他用户信息正常获取

jsp表单页面

<div class="col-md-8" style="background:#fff;padding:40px 80px;margin:30px;border:7px solid #ccc;">
  <font>会员注册</font>USER REGISTER
  <form class="form-horizontal" style="margin-top:5px;" action="${pageContext.request.contextPath}/user?method=regist" method="post">
    <div class="form-group">
       <label for="username" class="col-sm-2 control-label">用户名</label>
       <div class="col-sm-6">
         <input type="text" class="form-control" id="username" placeholder="请输入用户名" name = "username">
       </div>
     </div>
      <div class="form-group">
       <label for="inputPassword3" class="col-sm-2 control-label">密码</label>
       <div class="col-sm-6">
         <input type="password" class="form-control" id="inputPassword3" placeholder="请输入密码" name = "password" >
     
       </div>
     </div>
      <div class="form-group">
       <label for="confirmpwd" class="col-sm-2 control-label">确认密码</label>
       <div class="col-sm-6">
         <input type="password" class="form-control" id="confirmpwd" placeholder="请输入确认密码">
       </div>
     </div>
     <div class="form-group">
       <label for="inputEmail3" class="col-sm-2 control-label">Email</label>
       <div class="col-sm-6">
         <input type="email" class="form-control" id="inputEmail3" placeholder="Email" name="email">
       </div>
     </div>

servlet信息

public String regist(HttpServletRequest request, HttpServletResponse response) throws Exception {
  //1封装数据
  User user = new User();
  //注册自定义转换器
  ConvertUtils.register(new Myconverter(), Date.class);
  BeanUtils.populate(user, request.getParameterMap());
  System.out.println("hjkjkh"+user.getUesrname()+user.getName());   //请求发出后服务器打印  "hjkjkh"+name   username 值为null
  //1.1设置用户id
  user.setUid(UUIDUtils.getId());
  
  //1.2设置用户激活码
  user.setCode(UUIDUtils.getCode());
  //1.3加密密码
  user.setPassword(MD5Utils.md5(user.getPassword()));
  
  //2.调用service完成注册
  UserService s = new UserServiceImpl();
  s.regist(user);
  request.setAttribute("msg", "已注册成功,请邮件激活~~");
  return "/jsp/msg.jsp";
  
 }