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PO
primarykey
Id
3337115
data
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0
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4
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2010-07-26T17:03:10.887
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2010-07-26T17:03:10.887
LastEditDate
2017-05-23T12:10:08.920
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-1
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157882
ParentId
3337056
PostTypeId
2
Score
72
ViewCount
0
LastEditorDisplayName
text
Body
<code>multipart/form-data</code> encoded requests are indeed not by default supported by the Servlet API prior to version 3.0. The Servlet API parses the parameters by default using <code>application/x-www-form-urlencoded</code> encoding. When using a different encoding, the <code>request.getParameter()</code> calls will all return <code>null</code>. When you're already on Servlet 3.0 (<a href="http://glassfish.dev.java.net" rel="nofollow noreferrer">Glassfish 3</a>, <a href="http://tomcat.apache.org" rel="nofollow noreferrer">Tomcat 7</a>, etc), then you can use <a href="http://java.sun.com/javaee/6/docs/api/javax/servlet/http/HttpServletRequest.html#getParts()" rel="nofollow noreferrer"><code>HttpServletRequest#getParts()</code></a> instead. Also see <a href="http://balusc.blogspot.com/2009/12/uploading-files-in-servlet-30.html" rel="nofollow noreferrer">this blog</a> for extended examples. Prior to Servlet 3.0, a <a href="http://en.wikipedia.org/wiki/De_facto" rel="nofollow noreferrer">de facto</a> standard to parse <code>multipart/form-data</code> requests would be using <a href="http://commons.apache.org/fileupload" rel="nofollow noreferrer">Apache Commons FileUpload</a>. Just carefully read its User Guide and Frequently Asked Questions sections to learn how to use it. I've posted an answer with a code example before <a href="https://stackoverflow.com/questions/2422468/upload-big-file-to-servlet/2424824#2424824">here</a> (it also contains an example targeting Servlet 3.0).
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1. POConvenient way to parse incoming multipart/form-data parameters in a Servlet
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