JSP表单数据提交问题 - Java / Web 开发

form 提交数据, 用InputStream fileSource=request.getInputStream()可以看到如下数据:

-----------------------------7da1e43850104
Content-Disposition: form-data; name="topic"

topic
-----------------------------7da1e43850104
Content-Disposition: form-data; name="kind"

kind
-----------------------------7da1e43850104
Content-Disposition: form-data; name="master"

master
-----------------------------7da1e43850104
Content-Disposition: form-data; name="depart"

topic



数据已经传过来了, 可是用 
  String fileTopic =request.getParameter("topic"); 
  String fileKind =request.getParameter("kind"); 
  String fileMaster =request.getParameter("master"); 
  String fileDepart =request.getParameter("depart"); 
取的结果全是空NULL.

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form中有没有定义这几个属性？

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确定是同一个request，或者是被forward的request？

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<form action="upload.jsp" enctype="MULTIPART/FORM-DATA" method=post>
选择上传文件<input type="file" name="DocumentID"><br>  
文件主题<input name="topic" type="text" value="topic"><br>
文件类别<input name="kind" type="text" value="kind"><br>