我设法使用以下示例在App-Engine上传文件：
How to upload and store an image with google app engine (java)
和
How to upload pics in appengine java
问题是，我正在提交其他字段以及下面列出的文件字段：
<form action="index.jsp" method="post" enctype="multipart/form-data">
<input name="name" type="text" value=""> <br/>
<input name="imageField" type="file" size="30"> <br/>
<input name="Submit" type="submit" value="Sumbit">
</form>
在我的servlet中，查询时我得到null
name = request.getParameter("name");
为什么会这样？有没有办法检索文本字段值？
答案 0 :(得分：9)
您必须通过FileItemIterator。在您提到的示例中，仅处理图像（FileItemStream imageItm = iter.next();）。
// From the example: http://stackoverflow.com/questions/1513603/how-to-upload-and-store-an-image-with-google-app-engine-java
FileItemIterator iter = upload.getItemIterator(req);
// Parse the request
while (iter.hasNext()) {
FileItemStream item = iter.next();
String name = item.getFieldName();
InputStream stream = item.openStream();
if (item.isFormField()) {
System.out.println("Form field " + name + " with value "
+ Streams.asString(stream) + " detected.");
} else {
// Image here.
System.out.println("File field " + name + " with file name "
+ item.getName() + " detected.");
// Process the input stream
...
}
}