public class

ZipInputStream

extends InflaterInputStream
java.lang.Object
   ↳ java.io.InputStream
     ↳ java.io.FilterInputStream
       ↳ java.util.zip.InflaterInputStream
         ↳ java.util.zip.ZipInputStream
Known Direct Subclasses

Class Overview

This class implements an input stream filter for reading files in the ZIP file format. Includes support for both compressed and uncompressed entries.

Summary

Constants
int CENATT
int CENATX
int CENCOM
int CENCRC
int CENDSK
int CENEXT
int CENFLG
int CENHDR
int CENHOW
int CENLEN
int CENNAM
int CENOFF
long CENSIG
int CENSIZ
int CENTIM
int CENVEM
int CENVER
int ENDCOM
int ENDHDR
int ENDOFF
long ENDSIG
int ENDSIZ
int ENDSUB
int ENDTOT
int EXTCRC
int EXTHDR
int EXTLEN
long EXTSIG
int EXTSIZ
int LOCCRC
int LOCEXT
int LOCFLG
int LOCHDR
int LOCHOW
int LOCLEN
int LOCNAM
long LOCSIG
int LOCSIZ
int LOCTIM
int LOCVER
[Expand]
Inherited Fields
From class java.util.zip.InflaterInputStream
From class java.io.FilterInputStream
Public Constructors
ZipInputStream(InputStream in)
Creates a new ZIP input stream.
Public Methods
int available()
Returns 0 after EOF has reached for the current entry data, otherwise always return 1.
void close()
Closes this input stream and releases any system resources associated with the stream.
void closeEntry()
Closes the current ZIP entry and positions the stream for reading the next entry.
ZipEntry getNextEntry()
Reads the next ZIP file entry and positions the stream at the beginning of the entry data.
int read(byte[] b, int off, int len)
Reads from the current ZIP entry into an array of bytes.
long skip(long n)
Skips specified number of bytes in the current ZIP entry.
Protected Methods
ZipEntry createZipEntry(String name)
Creates a new ZipEntry object for the specified entry name.
[Expand]
Inherited Methods
From class java.util.zip.InflaterInputStream
From class java.io.FilterInputStream
From class java.io.InputStream
From class java.lang.Object
From interface java.io.Closeable

Constants

public static final int CENATT

Constant Value: 36 (0x00000024)

public static final int CENATX

Constant Value: 38 (0x00000026)

public static final int CENCOM

Constant Value: 32 (0x00000020)

public static final int CENCRC

Constant Value: 16 (0x00000010)

public static final int CENDSK

Constant Value: 34 (0x00000022)

public static final int CENEXT

Constant Value: 30 (0x0000001e)

public static final int CENFLG

Constant Value: 8 (0x00000008)

public static final int CENHDR

Constant Value: 46 (0x0000002e)

public static final int CENHOW

Constant Value: 10 (0x0000000a)

public static final int CENLEN

Constant Value: 24 (0x00000018)

public static final int CENNAM

Constant Value: 28 (0x0000001c)

public static final int CENOFF

Constant Value: 42 (0x0000002a)

public static final long CENSIG

Constant Value: 33639248 (0x0000000002014b50)

public static final int CENSIZ

Constant Value: 20 (0x00000014)

public static final int CENTIM

Constant Value: 12 (0x0000000c)

public static final int CENVEM

Constant Value: 4 (0x00000004)

public static final int CENVER

Constant Value: 6 (0x00000006)

public static final int ENDCOM

Constant Value: 20 (0x00000014)

public static final int ENDHDR

Constant Value: 22 (0x00000016)

public static final int ENDOFF

Constant Value: 16 (0x00000010)

public static final long ENDSIG

Constant Value: 101010256 (0x0000000006054b50)

public static final int ENDSIZ

Constant Value: 12 (0x0000000c)

public static final int ENDSUB

Constant Value: 8 (0x00000008)

public static final int ENDTOT

Constant Value: 10 (0x0000000a)

public static final int EXTCRC

Constant Value: 4 (0x00000004)

public static final int EXTHDR

Constant Value: 16 (0x00000010)

public static final int EXTLEN

Constant Value: 12 (0x0000000c)

public static final long EXTSIG

Constant Value: 134695760 (0x0000000008074b50)

public static final int EXTSIZ

Constant Value: 8 (0x00000008)

public static final int LOCCRC

Constant Value: 14 (0x0000000e)

public static final int LOCEXT

Constant Value: 28 (0x0000001c)

public static final int LOCFLG

Constant Value: 6 (0x00000006)

public static final int LOCHDR

Constant Value: 30 (0x0000001e)

public static final int LOCHOW

Constant Value: 8 (0x00000008)

public static final int LOCLEN

Constant Value: 22 (0x00000016)

public static final int LOCNAM

Constant Value: 26 (0x0000001a)

public static final long LOCSIG

Constant Value: 67324752 (0x0000000004034b50)

public static final int LOCSIZ

Constant Value: 18 (0x00000012)

public static final int LOCTIM

Constant Value: 10 (0x0000000a)

public static final int LOCVER

Constant Value: 4 (0x00000004)

Public Constructors

public ZipInputStream (InputStream in)

Creates a new ZIP input stream.

Parameters
in the actual input stream

Public Methods

public int available ()

Returns 0 after EOF has reached for the current entry data, otherwise always return 1.

Programs should not count on this method to return the actual number of bytes that could be read without blocking.

Returns
  • 1 before EOF and 0 after EOF has reached for current entry.
Throws
IOException if an I/O error occurs.

public void close ()

Closes this input stream and releases any system resources associated with the stream.

Throws
IOException if an I/O error has occurred

public void closeEntry ()

Closes the current ZIP entry and positions the stream for reading the next entry.

Throws
ZipException if a ZIP file error has occurred
IOException if an I/O error has occurred

public ZipEntry getNextEntry ()

Reads the next ZIP file entry and positions the stream at the beginning of the entry data.

Returns
  • the next ZIP file entry, or null if there are no more entries
Throws
ZipException if a ZIP file error has occurred
IOException if an I/O error has occurred

public int read (byte[] b, int off, int len)

Reads from the current ZIP entry into an array of bytes. If len is not zero, the method blocks until some input is available; otherwise, no bytes are read and 0 is returned.

Parameters
b the buffer into which the data is read
off the start offset in the destination array b
len the maximum number of bytes read
Returns
  • the actual number of bytes read, or -1 if the end of the entry is reached
Throws
NullPointerException If b is null.
IndexOutOfBoundsException If off is negative, len is negative, or len is greater than b.length - off
ZipException if a ZIP file error has occurred
IOException if an I/O error has occurred

public long skip (long n)

Skips specified number of bytes in the current ZIP entry.

Parameters
n the number of bytes to skip
Returns
  • the actual number of bytes skipped
Throws
ZipException if a ZIP file error has occurred
IOException if an I/O error has occurred
IllegalArgumentException if n < 0

Protected Methods

protected ZipEntry createZipEntry (String name)

Creates a new ZipEntry object for the specified entry name.

Parameters
name the ZIP file entry name
Returns
  • the ZipEntry just created