JAVA 中用Enumeration遍历Form 表单代码如下： public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
response.setContentType("text/html;charset=gb2312");
PrintWriter out = response.getWriter();
Enumeration <String> paramNames = request.getParameterNames();
while(paramNames.hasMoreElements()){
out.print(paramNames.nextElement());
}
。，用Enumeration是可以实现遍历表单，但是Enumeration 这个接口已经被Iterator所替代，小弟用Iterator遍历了，报错“java.lang.ClassCastException: java.util.Collections$1 cannot be cast to java.util.Iterator”，请给位指点下，将上面的代码用Iterator 来实现遍历！谢谢！
throws ServletException, IOException {
response.setContentType("text/html;charset=gb2312");
PrintWriter out = response.getWriter();
Enumeration <String> paramNames = request.getParameterNames();
while(paramNames.hasMoreElements()){
out.print(paramNames.nextElement());
}
。，用Enumeration是可以实现遍历表单，但是Enumeration 这个接口已经被Iterator所替代，小弟用Iterator遍历了，报错“java.lang.ClassCastException: java.util.Collections$1 cannot be cast to java.util.Iterator”，请给位指点下，将上面的代码用Iterator 来实现遍历！谢谢！
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>无标题文档</title>
</head><body>
<p align="center"> A Sample From Using Post</p>
<form id="form1" name="form1" method="get" action=""> <p>Number:
<input type="text" name="Number" />
<br>
<br>
Quantity:
<input type="text" name="Quantity" />
<br>
<br>
Price:
<input type="text" name="price" />
<br>
<br>First Name :
<input type="text" name="firstname" />
<br>
<br>
Last Name :
<input type="text" name="lastname" />
<br>
<br>
Middle Name :
<input type="text" name="middlename" />
<br>
<br>Address:
<textarea name="address" cols="40" rows="3"></textarea><br> <br>
Card Type:<br>
<input type="radio" name="cardtype" value="visa" />visa<br>
<input type="radio" name="cardtype" value="master" />master<br>
<input type="radio" name="cardtype" value="american express" />american express<br>
<input type="radio" name="cardtype" value="discover" />discover<br>
<input type="radio" name="cardtype" value="java smartcard" />java smartcard <br><br>card number:<input type="password" name="cardnumber" />
repeat card number:<input type="password" name="cardnumber" />
<p align="center"> <input type="submit" name="Submit" value="提交" />
</form>
</body>
</html>
这个是测试用的表单源码！
Iterator itr = list.iterator();
while(itr.hasNext()){
System.out.println(itr.next());
}把LIST换成你的集合
这句话返回改成这个样Collection paramNames = request.getParameterNames();