| Name | Description | Type | Package | Framework |
| BATManaged | This interface defines behaviors for objects managed by the Block Allocation Table (BAT). | Interface | org.apache.poi.poifs.filesystem | Apache POI |
| BlockStore | This abstract class describes a way to read, store, chain and free a series of blocks (be they Big or Small ones) | Class | org.apache.poi.poifs.filesystem | Apache POI |
| DirectoryEntry | This interface defines methods specific to Directory objects managed by a Filesystem instance. | Interface | org.apache.poi.poifs.filesystem | Apache POI |
| DirectoryNode | Class | org.apache.poi.poifs.filesystem | Apache POI | |
| DocumentDescriptor | Class | org.apache.poi.poifs.filesystem | Apache POI | |
| DocumentEntry | This interface defines methods specific to Document objects managed by a Filesystem instance. | Interface | org.apache.poi.poifs.filesystem | Apache POI |
| DocumentInputStream | This class provides methods to read a DocumentEntry managed by a POIFSFileSystem or NPOIFSFileSystem instance. | Class | org.apache.poi.poifs.filesystem | Apache POI |
| DocumentNode | Class | org.apache.poi.poifs.filesystem | Apache POI | |
| DocumentOutputStream | This class provides a wrapper over an OutputStream so that Document writers can't accidently go over their size limits | Class | org.apache.poi.poifs.filesystem | Apache POI |
| Entry | This interface provides access to an object managed by a Filesystem instance. | Interface | org.apache.poi.poifs.filesystem | Apache POI |
| EntryNode | Abstract implementation of Entry Extending classes should override isDocument() or isDirectory(), as | Class | org.apache.poi.poifs.filesystem | Apache POI |
| EntryUtils | Class | org.apache.poi.poifs.filesystem | Apache POI | |
| FilteringDirectoryNode | A DirectoryEntry filter, which exposes another DirectoryEntry less certain parts. | Class | org.apache.poi.poifs.filesystem | Apache POI |
| NDocumentInputStream | This class provides methods to read a DocumentEntry managed by a NPOIFSFileSystem instance. | Class | org.apache.poi.poifs.filesystem | Apache POI |
| NDocumentOutputStream | This class provides methods to write a DocumentEntry managed by a NPOIFSFileSystem instance. | Class | org.apache.poi.poifs.filesystem | Apache POI |
| NotOLE2FileException | This exception is thrown when we try to open a file that doesn't seem to actually be an OLE2 file after all | Class | org.apache.poi.poifs.filesystem | Apache POI |
| NPOIFSDocument | This class manages a document in the NIO POIFS filesystem. | Class | org.apache.poi.poifs.filesystem | Apache POI |
| NPOIFSFileSystem | This is the main class of the POIFS system; it manages the entire life cycle of the filesystem. | Class | org.apache.poi.poifs.filesystem | Apache POI |
| NPOIFSMiniStore | This class handles the MiniStream (small block store) in the NIO case for NPOIFSFileSystem | Class | org.apache.poi.poifs.filesystem | Apache POI |
| NPOIFSStream | This handles reading and writing a stream within a NPOIFSFileSystem. | Class | org.apache.poi.poifs.filesystem | Apache POI |
| ODocumentInputStream | This class provides methods to read a DocumentEntry managed by a OPOIFSFileSystem instance. | Class | org.apache.poi.poifs.filesystem | Apache POI |
| OfficeXmlFileException | This exception is thrown when we try to open a file that's actually an Office 2007+ XML file, rather than an OLE2 file (which is what | Class | org.apache.poi.poifs.filesystem | Apache POI |
| Ole10Native | Represents an Ole10Native record which is wrapped around certain binary files being embedded in OLE2 documents. | Class | org.apache.poi.poifs.filesystem | Apache POI |
| Ole10NativeException | Class | org.apache.poi.poifs.filesystem | Apache POI | |
| OPOIFSDocument | This class manages a document in a old-style OPOIFS filesystem. | Class | org.apache.poi.poifs.filesystem | Apache POI |
| OPOIFSFileSystem | This is the main class of the POIFS system; it manages the entire life cycle of the filesystem. | Class | org.apache.poi.poifs.filesystem | Apache POI |
| POIFSDocumentPath | Class | org.apache.poi.poifs.filesystem | Apache POI | |
| POIFSFileSystem | Transition class for the move from POIFSFileSystem to OPOIFSFileSystem, and from NPOIFSFileSystem to | Class | org.apache.poi.poifs.filesystem | Apache POI |
| POIFSWriterEvent | Class | org.apache.poi.poifs.filesystem | Apache POI | |
| POIFSWriterListener | Interface | org.apache.poi.poifs.filesystem | Apache POI | |