javaweb动态生成投票选项的问题
index.jsp：
<%@ page contentType="text/html; charset=UTF-8" language="java" import="java.sql.*" errorPage="" %>
<%@ page import="java.util.*"%>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>动态生成投票选项</title>
<script language="javascript" type="">
function Mycheck(){
if(form2.name.value=="")
{
alert("请输入投票信息！");
return false;
}
form2.submit();
}
</script>
</head>
<body>
<table width="570" height="275" border="0" align="center" cellpadding="0" cellspacing="0">
<tr>
<td align="right" background="bg.gif">
<table width="80%" height="104" border="0" cellpadding="0" cellspacing="0">
<tr>
<td width="10%"> </td>
<td width="79%" valign="top">
<%if(session.getAttribute("list")!=null){%>
<table width="315" border="0" cellpadding="0" cellspacing="0">
<form name="form1" method="post" action="dealwith.jsp?action=insertAll">
<tr>
<td height="25" colspan="2"><b>您最喜爱的图书评选：</b></td>
</tr>
<%
List list=(List)session.getAttribute("list");
String allName="";
for(int i=0;i<list.size();i++){
allName=(String)list.get(i);
%>
<tr>
<td width="230" height="25">选项名称： </td>
<td width="85" height="25">
<input type="text" name="allName" value="<%=allName%>">
</td>
</tr>
<%}%>
<tr>
<td height="25" colspan="2"><input type="submit" name="Submit" value="保存投票信息"></td>
</tr> </form>
</table>
<%}%>
<table width="315" border="0" cellpadding="0" cellspacing="0">
<form name="form2" method="post" action="dealwith.jsp?action=insertOne" onsubmit="return Mycheck()">
<tr>
<td height="25"><b>请输入投票选项,并单击【添加投票选项】按钮!</b></td>
</tr>
<tr>
<td height="25"><input type="text" name="name"></td>
</tr>
<tr>
<td height="25"> <input type="submit" name="Submit2" value="添加投票选项" >
</td>
</tr>
</form>
</table>
</td>
<td width="11%"> </td>
</tr>
</table>
<p> </p></td>
</tr>
</table>
</body>
</html>
dealwith.jsp：
<%@page contentType="text/html; charset=UTF-8" language="java" import="java.sql.*" errorPage=""%>
<%@page import="java.util.*"%>
<jsp:useBean id="connection" scope="request" class="com.JDBConnection"/>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<%
request.setCharacterEncoding("UTF-8");
String action = request.getParameter("action");
if (action.equals("insertAll")) {
List list = (List) session.getAttribute("list");
String allName = "";
for(int i=0;i<list.size();i++){
allName=(String)list.get(i);
String sql="insert into tb_book values ('"+allName+"')";
connection.executeUpdate(sql);
}
connection.closeConnection();
session.invalidate();
%>
<script language="javascript" type="text/javascript">
alert("添加成功");parent.location.href='index.jsp';
</script>
<% }
if (action.equals("insertOne")) {
List list = null;
if (session.getAttribute("list") == null) {
list = new ArrayList();
}else {
list = (List) session.getAttribute("list");
}
list.add(request.getParameter("name"));
session.setAttribute("list", list);
response.sendRedirect("index.jsp");
}
%>
问题：运行是没有问题的，点击”添加选票选项“后，原界面既然多了两条内容·是相同的··比如输入“111”，界面里
多出两个文本框里写着“111”··应该是多出一个文本框啊= =表示鸭梨很大··跪求达人！！！
[解决办法]
你为什么提交的时候又取了一遍list，把list的值都插入数据库了？
插入最新输入的不就可以了？
