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javax.activation

Class MimetypesFileTypeMap

Contents

  • public class MimetypesFileTypeMap
extends FileTypeMap
    This class extends FileTypeMap and provides data typing of files via their file extension. It uses the .mime.types format.

    MIME types file search order:

    The MimetypesFileTypeMap looks in various places in the user's system for MIME types file entries. When requests are made to search for MIME types in the MimetypesFileTypeMap, it searches MIME types files in the following order:

    1. Programmatically added entries to the MimetypesFileTypeMap instance.
    2. The file .mime.types in the user's home directory.
    3. The file <java.home>/lib/mime.types.
    4. The file or resources named META-INF/mime.types.
    5. The file or resource named META-INF/mimetypes.default (usually found only in the activation.jar file).

    MIME types file format:

    # comments begin with a '#'
    # the format is <mime type> <space separated file extensions>
    # for example:
    text/plain txt text TXT
    # this would map file.txt, file.text, and file.TXT to
    # the mime type "text/plain"

    Since:
    1.6

    • Constructor Detail

      • MimetypesFileTypeMap

        public MimetypesFileTypeMap()
        The default constructor.

      • MimetypesFileTypeMap

        public MimetypesFileTypeMap(String mimeTypeFileName)
                     throws IOException
        Construct a MimetypesFileTypeMap with programmatic entries added from the named file.
        Parameters:
        mimeTypeFileName - the file name
        Throws:
        IOException

      • MimetypesFileTypeMap

        public MimetypesFileTypeMap(InputStream is)
        Construct a MimetypesFileTypeMap with programmatic entries added from the InputStream.
        Parameters:
        is - the input stream to read from

    • Method Detail

      • addMimeTypes

        public void addMimeTypes(String mime_types)
        Prepend the MIME type values to the registry.
        Parameters:
        mime_types - A .mime.types formatted string of entries.

      • getContentType

        public String getContentType(File f)
        Return the MIME type of the file object. The implementation in this class calls getContentType(f.getName()).
        Specified by:
        getContentType in class FileTypeMap
        Parameters:
        f - the file
        Returns:
        the file's MIME type

      • getContentType

        public String getContentType(String filename)
        Return the MIME type based on the specified file name. The MIME type entries are searched as described above under MIME types file search order. If no entry is found, the type "application/octet-stream" is returned.
        Specified by:
        getContentType in class FileTypeMap
        Parameters:
        filename - the file name
        Returns:
        the file's MIME type
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