表单上传文件时，不能获取表单中字段解决方法

FileItemFactory factory = new DiskFileItemFactory();
ServletFileUpload upload1 = new ServletFileUpload(factory);
List<String> list = new ArrayList<String>();
List items = null;
items = upload1.parseRequest(request);
String values = "";
Iterator iter = items.iterator();
while (iter.hasNext()) {
FileItem item = (FileItem) iter.next();
if (item.isFormField()) {
values = item.getString();
list.add(values);
}
}