程序包 com.sh.common.zip

类 ZipFile

java.lang.Object

com.sh.common.zip.ZipFile

public class ZipFile
extends Object

Replacement for java.util.ZipFile.

This class adds support for file name encodings other than UTF-8 (which is required to work on ZIP files created by native zip tools and is able to skip a preamble like the one found in self extracting archives. Furthermore it returns instances of org.apache.tools.zip.ZipEntry instead of java.util.zip.ZipEntry.

It doesn't extend java.util.zip.ZipFile as it would have to reimplement all methods anyway. Like java.util.ZipFile, it uses RandomAccessFile under the covers and supports compressed and uncompressed entries.

The method signatures mimic the ones of java.util.zip.ZipFile, with a couple of exceptions:

• There is no getName method.
• entries has been renamed to getEntries.
• getEntries and getEntry return org.apache.tools.zip.ZipEntry instances.
• close is allowed to throw IOException.

构造器概要

构造器

构造器	说明
ZipFile(File f)	Opens the given file for reading, assuming the platform's native encoding for file names.
ZipFile(File f, String encoding)	Opens the given file for reading, assuming the specified encoding for file names and scanning for unicode extra fields.
ZipFile(File f, String encoding, boolean useUnicodeExtraFields)	Opens the given file for reading, assuming the specified encoding for file names.
ZipFile(String name)	Opens the given file for reading, assuming the platform's native encoding for file names.
ZipFile(String name, String encoding)	Opens the given file for reading, assuming the specified encoding for file names, scanning unicode extra fields.

方法概要

修饰符和类型	方法	说明
void	close()	Closes the archive.
static void	closeQuietly(ZipFile zipfile)	close a zipfile quietly; throw no io fault, do nothing on a null parameter
protected static Date	fromDosTime(ZipLong zipDosTime)	Convert a DOS date/time field to a Date object.
String	getEncoding()	The encoding to use for filenames and the file comment.
Enumeration	getEntries()	Returns all entries.
ZipEntry	getEntry(String name)	Returns a named entry - or null if no entry by that name exists.
InputStream	getInputStream(ZipEntry ze)	Returns an InputStream for reading the contents of the given entry.
protected String	getString(byte[] bytes)	Retrieve a String from the given bytes using the encoding set for this ZipFile.

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

ZipFile

public ZipFile(File f)
        throws IOException

Opens the given file for reading, assuming the platform's native encoding for file names.

参数:

f - the archive.

抛出:

IOException - if an error occurs while reading the file.

ZipFile

public ZipFile(String name)
        throws IOException

Opens the given file for reading, assuming the platform's native encoding for file names.

参数:

name - name of the archive.

抛出:

IOException - if an error occurs while reading the file.

ZipFile

public ZipFile(String name,
 String encoding)
        throws IOException

Opens the given file for reading, assuming the specified encoding for file names, scanning unicode extra fields.

参数:

name - name of the archive.

encoding - the encoding to use for file names

抛出:

IOException - if an error occurs while reading the file.

ZipFile

public ZipFile(File f,
 String encoding)
        throws IOException

Opens the given file for reading, assuming the specified encoding for file names and scanning for unicode extra fields.

参数:

f - the archive.

encoding - the encoding to use for file names, use null for the platform's default encoding

抛出:

IOException - if an error occurs while reading the file.

ZipFile

public ZipFile(File f,
 String encoding,
 boolean useUnicodeExtraFields)
        throws IOException

Opens the given file for reading, assuming the specified encoding for file names.

参数:

f - the archive.

encoding - the encoding to use for file names, use null for the platform's default encoding

useUnicodeExtraFields - whether to use InfoZIP Unicode Extra Fields (if present) to set the file names.

抛出:

IOException - if an error occurs while reading the file.

方法详细资料

getEncoding

public String getEncoding()

The encoding to use for filenames and the file comment.

返回:

null if using the platform's default character encoding.

close

public void close()
           throws IOException

Closes the archive.

抛出:

IOException - if an error occurs closing the archive.

closeQuietly

public static void closeQuietly(ZipFile zipfile)

close a zipfile quietly; throw no io fault, do nothing on a null parameter

参数:

zipfile - file to close, can be null

getEntries

public Enumeration getEntries()

Returns all entries.

返回:

all entries as ZipEntry instances

getEntry

public ZipEntry getEntry(String name)

Returns a named entry - or null if no entry by that name exists.

参数:

name - name of the entry.

返回:

the ZipEntry corresponding to the given name - or null if not present.

getInputStream

public InputStream getInputStream(ZipEntry ze)
                           throws IOException,
ZipException

Returns an InputStream for reading the contents of the given entry.

参数:

ze - the entry to get the stream for.

返回:

a stream to read the entry from.

抛出:

IOException - if unable to create an input stream from the zipenty

ZipException - if the zipentry has an unsupported compression method

fromDosTime

protected static Date fromDosTime(ZipLong zipDosTime)

Convert a DOS date/time field to a Date object.

参数:

zipDosTime - contains the stored DOS time.

返回:

a Date instance corresponding to the given time.

getString

protected String getString(byte[] bytes)
                    throws ZipException

Retrieve a String from the given bytes using the encoding set for this ZipFile.

参数:

bytes - the byte array to transform

返回:

String obtained by using the given encoding

抛出:

ZipException - if the encoding cannot be recognized.