如何找到 FileItemIterator 返回的 FileItemStream 的编码？
我使用 Apache Commons FileUpload 在 Servlet 中接收上传的文件，如 http: //code.google.com/appengine/kb/java.html#fileforms
ServletFileUpload upload = new ServletFileUpload();
FileItemIterator iterator = upload.getItemIterator(request);
while (iterator.hasNext()) {
FileItemStream item = iterator.next();
InputStream stream = item.openStream();
if (!item.isFormField()) {
System.out.println("Got an uploaded file: " + item.getFieldName()
+ ", name = " + item.getName() + " type = " + item.getContentType());
}
我不确定 item.getContentType() 是否也会包含可能与请求编码不同的文本文件的文件编码，（例如 ISO-8859-1），或者它始终仅包含文件类型。在我的测试中，我只收到“text/plain”，但我期待从客户端发送的“text/plain; Encoding=ISO-8859-1”。
我的理解是否正确：item.getContentType() 应包含编码（如果是从客户端发送的）？
I use Apache Commons FileUpload to receive uploaded files in a Servlet, as described at http://code.google.com/appengine/kb/java.html#fileforms
ServletFileUpload upload = new ServletFileUpload();
FileItemIterator iterator = upload.getItemIterator(request);
while (iterator.hasNext()) {
FileItemStream item = iterator.next();
InputStream stream = item.openStream();
if (!item.isFormField()) {
System.out.println("Got an uploaded file: " + item.getFieldName()
+ ", name = " + item.getName() + " type = " + item.getContentType());
}
I am not sure if item.getContentType() also will coutain the file encoding for text files which could be different from the request encoding, (for example ISO-8859-1), or if it always only contains the file type only. In my tests I received only "text/plain" but I was expecting "text/plain; Encoding=ISO-8859-1" which has been sent from the client.
Is my understanding correct that the item.getContentType() should include the encoding (if it is sent from client)?
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FileItemStream.getContentType() 返回从浏览器的 POST 传递的任何内容。它可能是“text/plain”，也可能是“text/plain；Encoding=ISO-8859-1”，或者它可能完全是垃圾。内容类型只是一个字符串值，您相信浏览器会正确地为您提供（换句话说，根本不信任它）。
FileItemStream.getContentType() returns whatever was passed from the browser's POST. It could be "text/plain" or it could be "text/plain; Encoding=ISO-8859-1" OR it could be complete garbage. The content type is just a string value you are trusting the browser to give you properly (in other words, don't trust it at all).