com.easycodebox.common.file

类 MimetypesFileTypeMap

java.lang.Object

javax.activation.FileTypeMap

com.easycodebox.common.file.MimetypesFileTypeMap

public class MimetypesFileTypeMap
extends FileTypeMap

修改自javax.activation.MimetypesFileTypeMap类

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

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"
type/subtype ext1 ext2 ... or type=type/subtype desc="description of type" exts=ext1,ext2,...

作者:

WangXiaoJin

嵌套类概要

嵌套类

限定符和类型	类和说明
class	MimetypesFileTypeMap.MimeTypeFile

构造器概要

构造器

构造器和说明
MimetypesFileTypeMap(InputStream is) Construct a MimetypesFileTypeMap with programmatic entries added from the InputStream.
MimetypesFileTypeMap(String mimeTypeFileName) Construct a MimetypesFileTypeMap with programmatic entries added from the named file.

方法概要

限定符和类型	方法和说明
void	addMimeTypes(String mime_types) Prepend the MIME type values to the registry.
String	getContentType(File f) Return the MIME type of the file object.
String	getContentType(String filename) Return the MIME type based on the specified file name.
String	getContentTypeByExt(String extension) 通过文件扩展名获取ContentType
String[]	getExtensions(String mimeType) 根据文件的mimeType或者可用的文件扩展名
static MimetypesFileTypeMap	getInstance() 获取单例对象

从类继承的方法 javax.activation.FileTypeMap

getDefaultFileTypeMap, setDefaultFileTypeMap

从类继承的方法 java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

构造器详细资料

MimetypesFileTypeMap

public MimetypesFileTypeMap(String mimeTypeFileName)
                     throws IOException

Construct a MimetypesFileTypeMap with programmatic entries added from the named file.

参数:

mimeTypeFileName - the file name

抛出:

IOException

MimetypesFileTypeMap

public MimetypesFileTypeMap(InputStream is)

Construct a MimetypesFileTypeMap with programmatic entries added from the InputStream.

参数:

is - the input stream to read from

方法详细资料

getInstance

public static MimetypesFileTypeMap getInstance()

获取单例对象

返回:

addMimeTypes

public void addMimeTypes(String mime_types)

Prepend the MIME type values to the registry.

参数:

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()).

指定者:

getContentType 在类中 FileTypeMap

参数:

f - the file

返回:

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.

指定者:

getContentType 在类中 FileTypeMap

参数:

filename - the file name

返回:

the file's MIME type

getContentTypeByExt

public String getContentTypeByExt(String extension)

通过文件扩展名获取ContentType

getExtensions

public String[] getExtensions(String mimeType)

根据文件的mimeType或者可用的文件扩展名

参数:

mimeType -

返回: