Added in API level 1

Summary: Constants | Inherited Fields | Ctors | Methods | Inherited Methods

ZipOutputStream

public class ZipOutputStream
extends DeflaterOutputStream

java.lang.Object
↳	java.io.OutputStream
	↳	java.io.FilterOutputStream
		↳	java.util.zip.DeflaterOutputStream
			↳	java.util.zip.ZipOutputStream

Known direct subclasses JarOutputStream JarOutputStream The JarOutputStream class is used to write the contents of a JAR file to any output stream.

---

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

Summary

Constants
int	CENATT Central directory (CEN) header internal file attributes field offset.
int	CENATX Central directory (CEN) header external file attributes field offset.
int	CENCOM Central directory (CEN) header comment length field offset.
int	CENCRC Central directory (CEN) header uncompressed file crc-32 value field offset.
int	CENDSK Central directory (CEN) header disk number start field offset.
int	CENEXT Central directory (CEN) header extra field length field offset.
int	CENFLG Central directory (CEN) header encrypt, decrypt flags field offset.
int	CENHDR Central directory (CEN) header size in bytes (including signature).
int	CENHOW Central directory (CEN) header compression method field offset.
int	CENLEN Central directory (CEN) header uncompressed size field offset.
int	CENNAM Central directory (CEN) header filename length field offset.
int	CENOFF Central directory (CEN) header LOC header offset field offset.
long	CENSIG Central directory (CEN) header signature.
int	CENSIZ Central directory (CEN) header compressed size field offset.
int	CENTIM Central directory (CEN) header modification time field offset.
int	CENVEM Central directory (CEN) header version made by field offset.
int	CENVER Central directory (CEN) header version needed to extract field offset.
int	DEFLATED Compression method for compressed (DEFLATED) entries.
int	ENDCOM End of central directory (END) header zip file comment length field offset.
int	ENDHDR End of central directory (END) header size in bytes (including signature).
int	ENDOFF End of central directory (END) header offset for the first CEN header field offset.
long	ENDSIG End of central directory (END) header signature.
int	ENDSIZ End of central directory (END) header central directory size in bytes field offset.
int	ENDSUB End of central directory (END) header number of entries on this disk field offset.
int	ENDTOT End of central directory (END) header total number of entries field offset.
int	EXTCRC Extra local (EXT) header uncompressed file crc-32 value field offset.
int	EXTHDR Extra local (EXT) header size in bytes (including signature).
int	EXTLEN Extra local (EXT) header uncompressed size field offset.
long	EXTSIG Extra local (EXT) header signature.
int	EXTSIZ Extra local (EXT) header compressed size field offset.
int	LOCCRC Local file (LOC) header uncompressed file crc-32 value field offset.
int	LOCEXT Local file (LOC) header extra field length field offset.
int	LOCFLG Local file (LOC) header general purpose bit flag field offset.
int	LOCHDR Local file (LOC) header size in bytes (including signature).
int	LOCHOW Local file (LOC) header compression method field offset.
int	LOCLEN Local file (LOC) header uncompressed size field offset.
int	LOCNAM Local file (LOC) header filename length field offset.
long	LOCSIG Local file (LOC) header signature.
int	LOCSIZ Local file (LOC) header compressed size field offset.
int	LOCTIM Local file (LOC) header modification time field offset.
int	LOCVER Local file (LOC) header version needed to extract field offset.
int	STORED Compression method for uncompressed (STORED) entries.

Inherited fields
From class java.util.zip.DeflaterOutputStream protected byte[] buf Output buffer for writing compressed data. protected Deflater def Compressor for this stream.
From class java.io.FilterOutputStream protected OutputStream out The underlying output stream to be filtered.

Public constructors
ZipOutputStream(OutputStream out) Creates a new ZIP output stream.
ZipOutputStream(OutputStream out, Charset charset) Creates a new ZIP output stream.

Public methods
void	close() Closes the ZIP output stream as well as the stream being filtered.
void	closeEntry() Closes the current ZIP entry and positions the stream for writing the next entry.
void	finish() Finishes writing the contents of the ZIP output stream without closing the underlying stream.
void	putNextEntry(ZipEntry e) Begins writing a new ZIP file entry and positions the stream to the start of the entry data.
void	setComment(String comment) Sets the ZIP file comment.
void	setLevel(int level) Sets the compression level for subsequent entries which are DEFLATED.
void	setMethod(int method) Sets the default compression method for subsequent entries.
void	write(byte[] b, int off, int len) Writes an array of bytes to the current ZIP entry data.

Inherited methods
From class java.util.zip.DeflaterOutputStream void close() Writes remaining compressed data to the output stream and closes the underlying stream. void deflate() Writes next block of compressed data to the output stream. void finish() Finishes writing compressed data to the output stream without closing the underlying stream. void flush() Flushes the compressed output stream. void write(byte[] b, int off, int len) Writes an array of bytes to the compressed output stream. void write(int b) Writes a byte to the compressed output stream.
From class java.io.FilterOutputStream void close() Closes this output stream and releases any system resources associated with the stream. void flush() Flushes this output stream and forces any buffered output bytes to be written out to the stream. void write(byte[] b) Writes b.length bytes to this output stream. void write(byte[] b, int off, int len) Writes len bytes from the specified byte array starting at offset off to this output stream. void write(int b) Writes the specified byte to this output stream.
From class java.io.OutputStream void close() Closes this output stream and releases any system resources associated with this stream. void flush() Flushes this output stream and forces any buffered output bytes to be written out. static OutputStream nullOutputStream() Returns a new OutputStream which discards all bytes. void write(byte[] b) Writes b.length bytes from the specified byte array to this output stream. void write(byte[] b, int off, int len) Writes len bytes from the specified byte array starting at offset off to this output stream. abstract void write(int b) Writes the specified byte to this output stream.
From class java.lang.Object Object clone() Creates and returns a copy of this object. boolean equals(Object obj) Indicates whether some other object is "equal to" this one. void finalize() Called by the garbage collector on an object when garbage collection determines that there are no more references to the object. final Class<?> getClass() Returns the runtime class of this Object. int hashCode() Returns a hash code value for the object. final void notify() Wakes up a single thread that is waiting on this object's monitor. final void notifyAll() Wakes up all threads that are waiting on this object's monitor. String toString() Returns a string representation of the object. final void wait(long timeoutMillis, int nanos) Causes the current thread to wait until it is awakened, typically by being notified or interrupted, or until a certain amount of real time has elapsed. final void wait(long timeoutMillis) Causes the current thread to wait until it is awakened, typically by being notified or interrupted, or until a certain amount of real time has elapsed. final void wait() Causes the current thread to wait until it is awakened, typically by being notified or interrupted.
From interface java.io.Closeable abstract void close() Closes this stream and releases any system resources associated with it.
From interface java.io.Flushable abstract void flush() Flushes this stream by writing any buffered output to the underlying stream.
From interface java.lang.AutoCloseable abstract void close() Closes this resource, relinquishing any underlying resources.

Constants

CENATT

Added in API level 21

public static final int CENATT

Central directory (CEN) header internal file attributes field offset.

Constant Value: 36 (0x00000024)

CENATX

Added in API level 21

public static final int CENATX

Central directory (CEN) header external file attributes field offset.

Constant Value: 38 (0x00000026)

CENCOM

Added in API level 21

public static final int CENCOM

Central directory (CEN) header comment length field offset.

Constant Value: 32 (0x00000020)

CENCRC

Added in API level 21

public static final int CENCRC

Central directory (CEN) header uncompressed file crc-32 value field offset.

Constant Value: 16 (0x00000010)

CENDSK

Added in API level 21

public static final int CENDSK

Central directory (CEN) header disk number start field offset.

Constant Value: 34 (0x00000022)

CENEXT

Added in API level 21

public static final int CENEXT

Central directory (CEN) header extra field length field offset.

Constant Value: 30 (0x0000001e)

CENFLG

Added in API level 21

public static final int CENFLG

Central directory (CEN) header encrypt, decrypt flags field offset.

Constant Value: 8 (0x00000008)

CENHDR

Added in API level 21

public static final int CENHDR

Central directory (CEN) header size in bytes (including signature).

Constant Value: 46 (0x0000002e)

CENHOW

Added in API level 21

public static final int CENHOW

Central directory (CEN) header compression method field offset.

Constant Value: 10 (0x0000000a)

CENLEN

Added in API level 21

public static final int CENLEN

Central directory (CEN) header uncompressed size field offset.

Constant Value: 24 (0x00000018)

CENNAM

Added in API level 21

public static final int CENNAM

Central directory (CEN) header filename length field offset.

Constant Value: 28 (0x0000001c)

CENOFF

Added in API level 21

public static final int CENOFF

Central directory (CEN) header LOC header offset field offset.

Constant Value: 42 (0x0000002a)

CENSIG

Added in API level 21

public static final long CENSIG

Central directory (CEN) header signature.

Constant Value: 33639248 (0x0000000002014b50)

CENSIZ

Added in API level 21

public static final int CENSIZ

Central directory (CEN) header compressed size field offset.

Constant Value: 20 (0x00000014)

CENTIM

Added in API level 21

public static final int CENTIM

Central directory (CEN) header modification time field offset.

Constant Value: 12 (0x0000000c)

CENVEM

Added in API level 21

public static final int CENVEM

Central directory (CEN) header version made by field offset.

Constant Value: 4 (0x00000004)

CENVER

Added in API level 21

public static final int CENVER

Central directory (CEN) header version needed to extract field offset.

Constant Value: 6 (0x00000006)

DEFLATED

Added in API level 1

public static final int DEFLATED

Compression method for compressed (DEFLATED) entries.

Constant Value: 8 (0x00000008)

ENDCOM

Added in API level 21

public static final int ENDCOM

End of central directory (END) header zip file comment length field offset.

Constant Value: 20 (0x00000014)

ENDHDR

Added in API level 21

public static final int ENDHDR

End of central directory (END) header size in bytes (including signature).

Constant Value: 22 (0x00000016)

ENDOFF

Added in API level 21

public static final int ENDOFF

End of central directory (END) header offset for the first CEN header field offset.

Constant Value: 16 (0x00000010)

ENDSIG

Added in API level 21

public static final long ENDSIG

End of central directory (END) header signature.

Constant Value: 101010256 (0x0000000006054b50)

ENDSIZ

Added in API level 21

public static final int ENDSIZ

End of central directory (END) header central directory size in bytes field offset.

Constant Value: 12 (0x0000000c)

ENDSUB

Added in API level 21

public static final int ENDSUB

End of central directory (END) header number of entries on this disk field offset.

Constant Value: 8 (0x00000008)

ENDTOT

Added in API level 21

public static final int ENDTOT

End of central directory (END) header total number of entries field offset.

Constant Value: 10 (0x0000000a)

EXTCRC

Added in API level 21

public static final int EXTCRC

Extra local (EXT) header uncompressed file crc-32 value field offset.

Constant Value: 4 (0x00000004)

EXTHDR

Added in API level 21

public static final int EXTHDR

Extra local (EXT) header size in bytes (including signature).

Constant Value: 16 (0x00000010)

EXTLEN

Added in API level 21

public static final int EXTLEN

Extra local (EXT) header uncompressed size field offset.

Constant Value: 12 (0x0000000c)

EXTSIG

Added in API level 21

public static final long EXTSIG

Extra local (EXT) header signature.

Constant Value: 134695760 (0x0000000008074b50)

EXTSIZ

Added in API level 21

public static final int EXTSIZ

Extra local (EXT) header compressed size field offset.

Constant Value: 8 (0x00000008)

LOCCRC

Added in API level 21

public static final int LOCCRC

Local file (LOC) header uncompressed file crc-32 value field offset.

Constant Value: 14 (0x0000000e)

LOCEXT

Added in API level 21

public static final int LOCEXT

Local file (LOC) header extra field length field offset.

Constant Value: 28 (0x0000001c)

LOCFLG

Added in API level 21

public static final int LOCFLG

Local file (LOC) header general purpose bit flag field offset.

Constant Value: 6 (0x00000006)

LOCHDR

Added in API level 21

public static final int LOCHDR

Local file (LOC) header size in bytes (including signature).

Constant Value: 30 (0x0000001e)

LOCHOW

Added in API level 21

public static final int LOCHOW

Local file (LOC) header compression method field offset.

Constant Value: 8 (0x00000008)

LOCLEN

Added in API level 21

public static final int LOCLEN

Local file (LOC) header uncompressed size field offset.

Constant Value: 22 (0x00000016)

LOCNAM

Added in API level 21

public static final int LOCNAM

Local file (LOC) header filename length field offset.

Constant Value: 26 (0x0000001a)

LOCSIG

Added in API level 21

public static final long LOCSIG

Local file (LOC) header signature.

Constant Value: 67324752 (0x0000000004034b50)

LOCSIZ

Added in API level 21

public static final int LOCSIZ

Local file (LOC) header compressed size field offset.

Constant Value: 18 (0x00000012)

LOCTIM

Added in API level 21

public static final int LOCTIM

Local file (LOC) header modification time field offset.

Constant Value: 10 (0x0000000a)

LOCVER

Added in API level 21

public static final int LOCVER

Local file (LOC) header version needed to extract field offset.

Constant Value: 4 (0x00000004)

STORED

Added in API level 1

public static final int STORED

Compression method for uncompressed (STORED) entries.

Constant Value: 0 (0x00000000)

Public constructors

ZipOutputStream

Added in API level 1

public ZipOutputStream (OutputStream out)

Creates a new ZIP output stream.

The UTF-8 charset is used to encode the entry names and comments.

Parameters
out	OutputStream: the actual output stream

ZipOutputStream

Added in API level 24

public ZipOutputStream (OutputStream out, 
                Charset charset)

Creates a new ZIP output stream.

Parameters
out	OutputStream: the actual output stream
charset	Charset: the charset to be used to encode the entry names and comments

Public methods

close

Added in API level 1

public void close ()

Closes the ZIP output stream as well as the stream being filtered.

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

closeEntry

Added in API level 1

public void closeEntry ()

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

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

finish

Added in API level 1

public void finish ()

Finishes writing the contents of the ZIP output stream without closing the underlying stream. Use this method when applying multiple filters in succession to the same output stream.

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

putNextEntry

Added in API level 1

public void putNextEntry (ZipEntry e)

Begins writing a new ZIP file entry and positions the stream to the start of the entry data. Closes the current entry if still active.

The default compression method will be used if no compression method was specified for the entry. When writing a compressed (DEFLATED) entry, and the compressed size has not been explicitly set with the ZipEntry#setCompressedSize(long) method, then the compressed size will be set to the actual compressed size after deflation.

The current time will be used if the entry has no set modification time.

Parameters
e	ZipEntry: the ZIP entry to be written

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

setComment

Added in API level 1

public void setComment (String comment)

Sets the ZIP file comment.

Parameters
comment	String: the comment string

Throws
IllegalArgumentException	if the length of the specified ZIP file comment is greater than 0xFFFF bytes

setLevel

Added in API level 1

public void setLevel (int level)

Sets the compression level for subsequent entries which are DEFLATED. The default setting is DEFAULT_COMPRESSION.

Parameters
level	int: the compression level (0-9)

Throws
IllegalArgumentException	if the compression level is invalid

setMethod

Added in API level 1

public void setMethod (int method)

Sets the default compression method for subsequent entries. This default will be used whenever the compression method is not specified for an individual ZIP file entry, and is initially set to DEFLATED.

Parameters
method	int: the default compression method

Throws
IllegalArgumentException	if the specified compression method is invalid

write

Added in API level 1

public void write (byte[] b, 
                int off, 
                int len)

Writes an array of bytes to the current ZIP entry data. This method will block until all the bytes are written.

Parameters
b	byte: the data to be written
off	int: the start offset in the data
len	int: the number of bytes that are written

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