<form action="doLogon.jsp">
<h2>用户登录</h2>
用户名：<input type="text"name="userName">
<br>
密&nbsp;码:<input type="password"name="userPass">
<br>
<input type="submit"value="登录">
<input type="reset"value="重置">
</form>
<%
  String name=request.getParameter("userName");
  if(name==null)name="";
  String password=request.getParameter("userPass");
  if(password==null)password="";
%>
<center> 
<b>用户名:</b><%=name %>
<b>密码：</b><%=password %>
</center>