The following document contains the results of a JDepend metric analysis. The various metrics are defined at the bottom of this document.
| Package | TC | CC | AC | Ca | Ce | A | I | D | V | 
| org.apache.commons.fileupload | 34 | 23 | 11 | 4 | 9 | 32.0% | 69.0% | 2.0% | 1 | 
| org.apache.commons.fileupload.disk | 2 | 2 | 0 | 1 | 8 | 0.0% | 89.0% | 11.0% | 1 | 
| org.apache.commons.fileupload.portlet | 2 | 2 | 0 | 0 | 5 | 0.0% | 100.0% | 0.0% | 1 | 
| org.apache.commons.fileupload.servlet | 3 | 3 | 0 | 1 | 7 | 0.0% | 88.0% | 12.0% | 1 | 
| org.apache.commons.fileupload.util | 4 | 2 | 2 | 2 | 5 | 50.0% | 71.0% | 21.0% | 1 | 
| org.apache.commons.fileupload.util.mime | 4 | 4 | 0 | 1 | 3 | 0.0% | 75.0% | 25.0% | 1 | 
| Abstract Classes | Concrete Classes | Used by Packages | Uses Packages | 
| org.apache.commons.fileupload.FileItem org.apache.commons.fileupload.FileItemFactory
 org.apache.commons.fileupload.FileItemHeaders
 org.apache.commons.fileupload.FileItemHeadersSupport
 org.apache.commons.fileupload.FileItemIterator
 org.apache.commons.fileupload.FileItemStream
 org.apache.commons.fileupload.FileUploadBase
 org.apache.commons.fileupload.FileUploadBase$SizeException
 org.apache.commons.fileupload.ProgressListener
 org.apache.commons.fileupload.RequestContext
 org.apache.commons.fileupload.UploadContext
 
 | org.apache.commons.fileupload.DefaultFileItem org.apache.commons.fileupload.DefaultFileItemFactory
 org.apache.commons.fileupload.DiskFileUpload
 org.apache.commons.fileupload.FileItemStream$ItemSkippedException
 org.apache.commons.fileupload.FileUpload
 org.apache.commons.fileupload.FileUploadBase$FileItemIteratorImpl
 org.apache.commons.fileupload.FileUploadBase$FileItemIteratorImpl$1
 org.apache.commons.fileupload.FileUploadBase$FileItemIteratorImpl$FileItemStreamImpl
 org.apache.commons.fileupload.FileUploadBase$FileItemIteratorImpl$FileItemStreamImpl$1
 org.apache.commons.fileupload.FileUploadBase$FileSizeLimitExceededException
 org.apache.commons.fileupload.FileUploadBase$FileUploadIOException
 org.apache.commons.fileupload.FileUploadBase$IOFileUploadException
 org.apache.commons.fileupload.FileUploadBase$InvalidContentTypeException
 org.apache.commons.fileupload.FileUploadBase$SizeLimitExceededException
 org.apache.commons.fileupload.FileUploadBase$UnknownSizeException
 org.apache.commons.fileupload.FileUploadException
 org.apache.commons.fileupload.InvalidFileNameException
 org.apache.commons.fileupload.MultipartStream
 org.apache.commons.fileupload.MultipartStream$IllegalBoundaryException
 org.apache.commons.fileupload.MultipartStream$ItemInputStream
 org.apache.commons.fileupload.MultipartStream$MalformedStreamException
 org.apache.commons.fileupload.MultipartStream$ProgressNotifier
 org.apache.commons.fileupload.ParameterParser
 
 | org.apache.commons.fileupload.disk org.apache.commons.fileupload.portlet
 org.apache.commons.fileupload.servlet
 org.apache.commons.fileupload.util
 
 | java.io java.lang
 java.util
 javax.servlet.http
 org.apache.commons.fileupload.disk
 org.apache.commons.fileupload.servlet
 org.apache.commons.fileupload.util
 org.apache.commons.fileupload.util.mime
 org.apache.commons.io
 
 | 
| Abstract Classes | Concrete Classes | Used by Packages | Uses Packages | 
| None | org.apache.commons.fileupload.disk.DiskFileItem org.apache.commons.fileupload.disk.DiskFileItemFactory
 
 | org.apache.commons.fileupload 
 | java.io java.lang
 java.util
 java.util.concurrent.atomic
 org.apache.commons.fileupload
 org.apache.commons.fileupload.util
 org.apache.commons.io
 org.apache.commons.io.output
 
 | 
| Abstract Classes | Concrete Classes | Used by Packages | Uses Packages | 
| None | org.apache.commons.fileupload.portlet.PortletFileUpload org.apache.commons.fileupload.portlet.PortletRequestContext
 
 | None | java.io java.lang
 java.util
 javax.portlet
 org.apache.commons.fileupload
 
 | 
| Abstract Classes | Concrete Classes | Used by Packages | Uses Packages | 
| None | org.apache.commons.fileupload.servlet.FileCleanerCleanup org.apache.commons.fileupload.servlet.ServletFileUpload
 org.apache.commons.fileupload.servlet.ServletRequestContext
 
 | org.apache.commons.fileupload 
 | java.io java.lang
 java.util
 javax.servlet
 javax.servlet.http
 org.apache.commons.fileupload
 org.apache.commons.io
 
 | 
| Abstract Classes | Concrete Classes | Used by Packages | Uses Packages | 
| org.apache.commons.fileupload.util.Closeable org.apache.commons.fileupload.util.LimitedInputStream
 
 | org.apache.commons.fileupload.util.FileItemHeadersImpl org.apache.commons.fileupload.util.Streams
 
 | org.apache.commons.fileupload org.apache.commons.fileupload.disk
 
 | java.io java.lang
 java.util
 org.apache.commons.fileupload
 org.apache.commons.io
 
 | 
| Abstract Classes | Concrete Classes | Used by Packages | Uses Packages | 
| None | org.apache.commons.fileupload.util.mime.Base64Decoder org.apache.commons.fileupload.util.mime.MimeUtility
 org.apache.commons.fileupload.util.mime.ParseException
 org.apache.commons.fileupload.util.mime.QuotedPrintableDecoder
 
 | org.apache.commons.fileupload 
 | java.io java.lang
 java.util
 
 | 
| Package | Package Dependencies | 
| org.apache.commons.fileupload | org.apache.commons.fileupload.util org.apache.commons.fileupload
 
 | 
| org.apache.commons.fileupload.disk | org.apache.commons.fileupload.util org.apache.commons.fileupload
 org.apache.commons.fileupload.util
 
 | 
| org.apache.commons.fileupload.portlet | org.apache.commons.fileupload org.apache.commons.fileupload.util
 org.apache.commons.fileupload
 
 | 
| org.apache.commons.fileupload.servlet | org.apache.commons.fileupload org.apache.commons.fileupload.util
 org.apache.commons.fileupload
 
 | 
| org.apache.commons.fileupload.util | org.apache.commons.fileupload org.apache.commons.fileupload.util
 
 | 
The following explanations are for quick reference and are lifted directly from the original JDepend documentation.
| Term | Description | 
| Number of Classes | The number of concrete and abstract classes (and interfaces) in the package is an indicator of the extensibility of the package. | 
| Afferent Couplings | The number of other packages that depend upon classes within the package is an indicator of the package's responsibility. | 
| Efferent Couplings | The number of other packages that the classes in the package depend upon is an indicator of the package's independence. | 
| Abstractness | The ratio of the number of abstract classes (and interfaces) in the analyzed package to the total number of classes in the analyzed package. The range for this metric is 0 to 1, with A=0 indicating a completely concrete package and A=1 indicating a completely abstract package. | 
| Instability | The ratio of efferent coupling (Ce) to total coupling (Ce / (Ce + Ca)). This metric is an indicator of the package's resilience to change. The range for this metric is 0 to 1, with I=0 indicating a completely stable package and I=1 indicating a completely instable package. | 
| Distance | The perpendicular distance of a package from the idealized line A + I = 1. This metric is an indicator of the package's balance between abstractness and stability. A package squarely on the main sequence is optimally balanced with respect to its abstractness and stability. Ideal packages are either completely abstract and stable (x=0, y=1) or completely concrete and instable (x=1, y=0). The range for this metric is 0 to 1, with D=0 indicating a package that is coincident with the main sequence and D=1 indicating a package that is as far from the main sequence as possible. | 
| Cycles | Packages participating in a package dependency cycle are  in a deadly embrace with respect to reusability and their  release cycle. Package dependency cycles can be easily identified by reviewing the textual reports of dependency cycles. Once these dependency cycles have been identified with JDepend, they can be broken by employing various object-oriented techniques. |