1.

 <body>
    <div align="center">
            <form action="MyJsp1.jsp" method="get">
                <table style="float: left">
                    <tr>
                        <td>用户名：<br><br></td>
                        <td><input type="text" name="user" /><br><br>
                        </td>
                    </tr>

                    <tr>
                        <td>密码：<br><br></td>
                        <td><input type="password" name="password" /><br><br>
                        </td>
                    </tr>

                    <tr>
                        <td>确认密码<br><br></td>
                        <td><input type="password" name="password2" /><br><br>
                        </td>
                    </tr>

                    <tr>
                        <td>性别<br><br></td>
                        <td><input type="radio" name="sex" value ="男"/> 男
                            <input type="radio" name="sex" value ="女"/> 女<br>
                        </td>
                    </tr>

                    <tr>
                        <td>电子邮件<br><br></td>
                        <td><input type="email" name="email"><br><br>
                        </td>
                    </tr>
                    <tr>

                        <td>出生日期<br><br></td>
                        <td><input type="date" name="date"><br><br>
                        </td>
                    </tr>

                    <tr>
                        <td colspan="2" align="right"><input type="submit"
                            value="同意以下协议条款并提交">
                        </td>
                    </tr>
                </table>
            </form>
            <br> <br> <br> <br> <br> <br> <br><br> <br> <br> <br>
            <br> <br> <br> <br> <br> <br> <br> 

            <textarea cols="50" rows="10" style="float: left;">
              空白
            </textarea>
    </div>
</body>
  <body>
  <h1>您注册的信息如下</h1>
  <% 
  request.setCharacterEncoding("utf-8");
  String str=request.getParameter("user");
  String user=new String(str.getBytes("ISO-8859-1"),"utf-8");
  String password=request.getParameter("password");
  String a=request.getParameter("sex");
  String sex=new String(a.getBytes("ISO-8859-1"),"utf-8");
  String email=request.getParameter("email");
   String date=request.getParameter("date");
  %>
用户名：<%=user %><br>
密码：<%=password %><br>
性别：<%=sex %><br>
电子邮件：<%=email %><br>
出生日期：<%=date %>  <br>
  </body>

 <body>
  求平均值
  <form action="MyJsp3.jsp" method="get"> 
  <table>
  <tr>
  <td>姓名</td>
  <td><input type="text" name="user"/></td>
  </tr>
  

<tr>
  <td>性别</td>
  <td><input type="radio" name="sex" value="男"/>男</td>
   <td><input type="radio" name="sex" value="女"/>女</td>
  </tr>
  
  <tr>
  <td>班级</td>
  <td><select name="bj">
  <option value="1903">1903</option>
  <option value="1902">1902</option>
  <option value="1901">1901</option></select>

  </td>
  </tr>
  
  <tr>
  <td>语文</td>
  <td><input type="number" name="ch"/></td>
  </tr>
  
  <tr>
  <td>数学</td>
  <td><input type="number" name="ma"/></td>
  </tr>
   <tr>
  <td>英语</td>
  <td><input type="number" name="en"/></td>
  </tr>
  <tr>
  <td>
  <input type="submit" value="提交"/></td>
   <td><input type="reset" value="重置"/></td>
  </tr>
  
  </table>
  </form>
  
  </body>
  <body>
  
  <% request.setCharacterEncoding("utf-8"); 
  String str=request.getParameter("user");
  String user=new String(str.getBytes("ISO-8859-1"),"utf-8");
  String a=request.getParameter("sex");
  String sex=new String(a.getBytes("ISO-8859-1"),"utf-8");
  String bj=request.getParameter("bj");
  String ch=request.getParameter("ch");
  double c=ch==null?-1:Double.parseDouble(ch);
  String ma=request.getParameter("ma");
  double m=ma==null?-1:Double.parseDouble(ma);
  String en=request.getParameter("en");
  double e=en==null?-1:Double.parseDouble(en);
  double sum=c+m+e;
  double avg=sum/3;     
  %>
  你好！<%=bj %>班的<%=user %>同学！<br>
  性别：<%=sex %><br>
  您的各科平均分为<%=avg%>
  </body>