程序包 com.baidubce.util

类 Mimetypes

  • public class Mimetypes
extends Object
    Utility class that maintains a listing of known Mimetypes, and determines the mimetype of files based on file extensions.

    This class is obtained with the {#link getInstance() method that recognizes loaded mime types from the file mime.types if this file is available at the root of the classpath. The mime.types file format, and most of the content, is taken from the Apache HTTP server's mime.types file.

    The format for mime type setting documents is: mimetype <Space | Tab>+ extension (<Space|Tab>+ extension)*. Any blank lines in the file are ignored, as are lines starting with # which are considered comments. Lines that have a mimetype but no associated extensions are also ignored.

    • 字段详细资料

      • MIMETYPE_OCTET_STREAM

        public static final String MIMETYPE_OCTET_STREAM
        The default binary mimetype: application/octet-stream
        另请参阅:
        常量字段值

    • 方法详细资料

      • getInstance

        public static Mimetypes getInstance()
        Loads MIME type info from the file 'mime.types' in the classpath, if it's available.

      • loadAndReplaceMimetypes

        public void loadAndReplaceMimetypes​(InputStream is)
                             throws IOException
        Reads and stores the mime type setting corresponding to a file extension, by reading text from an InputStream. If a mime type setting already exists when this method is run, the mime type value is replaced with the newer one.
        参数:
        is -
        抛出:
        IOException

      • getMimetype

        public String getMimetype​(String fileName)
        Determines the mimetype of a file by looking up the file's extension in an internal listing to find the corresponding mime type. If the file has no extension, or the extension is not available in the listing contained in this class, the default mimetype application/octet-stream is returned.

        A file extension is one or more characters that occur after the last period (.) in the file's name. If a file has no extension, Guesses the mimetype of file data based on the file's extension.

        参数:
        fileName - The name of the file whose extension may match a known mimetype.
        返回:
        The file's mimetype based on its extension, or a default value of application/octet-stream if a mime type value cannot be found.

      • getMimetype

        public String getMimetype​(File file)
        Determines the mimetype of a file by looking up the file's extension in an internal listing to find the corresponding mime type. If the file has no extension, or the extension is not available in the listing contained in this class, the default mimetype application/octet-stream is returned.

        A file extension is one or more characters that occur after the last period (.) in the file's name. If a file has no extension, Guesses the mimetype of file data based on the file's extension.

        参数:
        file - the file whose extension may match a known mimetype.
        返回:
        the file's mimetype based on its extension, or a default value of application/octet-stream if a mime type value cannot be found.