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Java(TM) 2 Platform, Standard Edition, v1.2.2 API Specification: Class ZipFile - JDK 5 Documentation v1.2.2, Java 2 SDK 英文文档

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java.util.zip
Class ZipFile

java.lang.Object
  |
  +--java.util.zip.ZipFile

Direct Known Subclasses:

JarFile

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public class ZipFile

extends Object

implements java.util.zip.ZipConstants

This class is used to read entries from a zip file.

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Fields inherited from interface java.util.zip.ZipConstants

CENATT, CENATX, CENCOM, CENCRC, CENDSK, CENEXT, CENFLG, CENHDR, CENHOW, CENLEN, CENNAM, CENOFF, CENSIG, CENSIZ, CENTIM, CENVEM, CENVER, ENDCOM, ENDHDR, ENDOFF, ENDSIG, ENDSIZ, ENDSUB, ENDTOT, EXTCRC, EXTHDR, EXTLEN, EXTSIG, EXTSIZ, LOCCRC, LOCEXT, LOCFLG, LOCHDR, LOCHOW, LOCLEN, LOCNAM, LOCSIG, LOCSIZ, LOCTIM, LOCVER

 

Constructor Summary

ZipFile(File file)           Opens a ZIP file for reading given the specified File object.

ZipFile(String name)           Opens a zip file for reading.

 

Method Summary
void	close()           Closes the ZIP file.
Enumeration	entries()           Returns an enumeration of the ZIP file entries.
ZipEntry	getEntry(String name)           Returns the zip file entry for the specified name, or null if not found.
InputStream	getInputStream(ZipEntry entry)           Returns an input stream for reading the contents of the specified zip file entry.
String	getName()           Returns the path name of the ZIP file.
int	size()           Returns the number of entries in the ZIP file.

 

Methods inherited from class java.lang.Object

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

 

Constructor Detail

ZipFile

public ZipFile(String name)
        throws IOException

Opens a zip file for reading.

First, if there is a security manager, its checkRead method is called with the name argument as its argument to ensure the read is allowed.

Parameters:

name - the name of the zip file

Throws:

ZipException - if a ZIP format error has occurred

IOException - if an I/O error has occurred

SecurityException - if a security manager exists and its checkRead method doesn't allow read access to the file.

See Also:

SecurityManager.checkRead(java.lang.String)

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ZipFile

public ZipFile(File file)
        throws ZipException,
               IOException

Opens a ZIP file for reading given the specified File object.

Parameters:

file - the ZIP file to be opened for reading

Throws:

ZipException - if a ZIP error has occurred

IOException - if an I/O error has occurred

Method Detail

getEntry

public ZipEntry getEntry(String name)

Returns the zip file entry for the specified name, or null if not found.

Parameters:

name - the name of the entry

Returns:

the zip file entry, or null if not found

Throws:

IllegalStateException - if the zip file has been closed

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getInputStream

public InputStream getInputStream(ZipEntry entry)
                           throws IOException

Returns an input stream for reading the contents of the specified zip file entry.

Parameters:

entry - the zip file entry

Throws:

ZipException - if a ZIP format error has occurred

IOException - if an I/O error has occurred

IllegalStateException - if the zip file has been closed

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getName

public String getName()

Returns the path name of the ZIP file.

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entries

public Enumeration entries()

Returns an enumeration of the ZIP file entries.

Throws:

IllegalStateException - if the zip file has been closed

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size

public int size()

Returns the number of entries in the ZIP file.

Throws:

IllegalStateException - if the zip file has been closed

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close

public void close()
           throws IOException

Closes the ZIP file.

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