Java™ Platform
Standard Ed. 6

java.util.zip
Class ZipOutputStream

java.lang.Object
  extended by java.io.OutputStream
      extended by java.io.FilterOutputStream
          extended by java.util.zip.DeflaterOutputStream
              extended by java.util.zip.ZipOutputStream
All Implemented Interfaces:
Closeable, Flushable
Direct Known Subclasses:
JarOutputStream

public class ZipOutputStream
extends DeflaterOutputStream

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


Field Summary
static int CENATT
           
static int CENATX
           
static int CENCOM
           
static int CENCRC
           
static int CENDSK
           
static int CENEXT
           
static int CENFLG
           
static int CENHDR
           
static int CENHOW
           
static int CENLEN
           
static int CENNAM
           
static int CENOFF
           
static long CENSIG
           
static int CENSIZ
           
static int CENTIM
           
static int CENVEM
           
static int CENVER
           
static int DEFLATED
          Compression method for compressed (DEFLATED) entries.
static int ENDCOM
           
static int ENDHDR
           
static int ENDOFF
           
static long ENDSIG
           
static int ENDSIZ
           
static int ENDSUB
           
static int ENDTOT
           
static int EXTCRC
           
static int EXTHDR
           
static int EXTLEN
           
static long EXTSIG
           
static int EXTSIZ
           
static int LOCCRC
           
static int LOCEXT
           
static int LOCFLG
           
static int LOCHDR
           
static int LOCHOW
           
static int LOCLEN
           
static int LOCNAM
           
static long LOCSIG
           
static int LOCSIZ
           
static int LOCTIM
           
static int LOCVER
           
static int STORED
          Compression method for uncompressed (STORED) entries.
 
Fields inherited from class java.util.zip.DeflaterOutputStream
buf, def
 
Fields inherited from class java.io.FilterOutputStream
out
 
Constructor Summary
ZipOutputStream(OutputStream out)
          Creates a new ZIP output stream.
 
Method Summary
 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.
 
Methods inherited from class java.util.zip.DeflaterOutputStream
deflate, write
 
Methods inherited from class java.io.FilterOutputStream
flush, write
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Field Detail

STORED

public static final int STORED
Compression method for uncompressed (STORED) entries.

See Also:
Constant Field Values

DEFLATED

public static final int DEFLATED
Compression method for compressed (DEFLATED) entries.

See Also:
Constant Field Values

LOCSIG

public static final long LOCSIG
See Also:
Constant Field Values

EXTSIG

public static final long EXTSIG
See Also:
Constant Field Values

CENSIG

public static final long CENSIG
See Also:
Constant Field Values

ENDSIG

public static final long ENDSIG
See Also:
Constant Field Values

LOCHDR

public static final int LOCHDR
See Also:
Constant Field Values

EXTHDR

public static final int EXTHDR
See Also:
Constant Field Values

CENHDR

public static final int CENHDR
See Also:
Constant Field Values

ENDHDR

public static final int ENDHDR
See Also:
Constant Field Values

LOCVER

public static final int LOCVER
See Also:
Constant Field Values

LOCFLG

public static final int LOCFLG
See Also:
Constant Field Values

LOCHOW

public static final int LOCHOW
See Also:
Constant Field Values

LOCTIM

public static final int LOCTIM
See Also:
Constant Field Values

LOCCRC

public static final int LOCCRC
See Also:
Constant Field Values

LOCSIZ

public static final int LOCSIZ
See Also:
Constant Field Values

LOCLEN

public static final int LOCLEN
See Also:
Constant Field Values

LOCNAM

public static final int LOCNAM
See Also:
Constant Field Values

LOCEXT

public static final int LOCEXT
See Also:
Constant Field Values

EXTCRC

public static final int EXTCRC
See Also:
Constant Field Values

EXTSIZ

public static final int EXTSIZ
See Also:
Constant Field Values

EXTLEN

public static final int EXTLEN
See Also:
Constant Field Values

CENVEM

public static final int CENVEM
See Also:
Constant Field Values

CENVER

public static final int CENVER
See Also:
Constant Field Values

CENFLG

public static final int CENFLG
See Also:
Constant Field Values

CENHOW

public static final int CENHOW
See Also:
Constant Field Values

CENTIM

public static final int CENTIM
See Also:
Constant Field Values

CENCRC

public static final int CENCRC
See Also:
Constant Field Values

CENSIZ

public static final int CENSIZ
See Also:
Constant Field Values

CENLEN

public static final int CENLEN
See Also:
Constant Field Values

CENNAM

public static final int CENNAM
See Also:
Constant Field Values

CENEXT

public static final int CENEXT
See Also:
Constant Field Values

CENCOM

public static final int CENCOM
See Also:
Constant Field Values

CENDSK

public static final int CENDSK
See Also:
Constant Field Values

CENATT

public static final int CENATT
See Also:
Constant Field Values

CENATX

public static final int CENATX
See Also:
Constant Field Values

CENOFF

public static final int CENOFF
See Also:
Constant Field Values

ENDSUB

public static final int ENDSUB
See Also:
Constant Field Values

ENDTOT

public static final int ENDTOT
See Also:
Constant Field Values

ENDSIZ

public static final int ENDSIZ
See Also:
Constant Field Values

ENDOFF

public static final int ENDOFF
See Also:
Constant Field Values

ENDCOM

public static final int ENDCOM
See Also:
Constant Field Values
Constructor Detail

ZipOutputStream

public ZipOutputStream(OutputStream out)
Creates a new ZIP output stream.

Parameters:
out - the actual output stream
Method Detail

setComment

public void setComment(String comment)
Sets the ZIP file comment.

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

setMethod

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 - the default compression method
Throws:
IllegalArgumentException - if the specified compression method is invalid

setLevel

public void setLevel(int level)
Sets the compression level for subsequent entries which are DEFLATED. The default setting is DEFAULT_COMPRESSION.

Parameters:
level - the compression level (0-9)
Throws:
IllegalArgumentException - if the compression level is invalid

putNextEntry

public void putNextEntry(ZipEntry e)
                  throws IOException
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, and the current time will be used if the entry has no set modification time.

Parameters:
e - the ZIP entry to be written
Throws:
ZipException - if a ZIP format error has occurred
IOException - if an I/O error has occurred

closeEntry

public void closeEntry()
                throws IOException
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

write

public void write(byte[] b,
                  int off,
                  int len)
           throws IOException
Writes an array of bytes to the current ZIP entry data. This method will block until all the bytes are written.

Overrides:
write in class DeflaterOutputStream
Parameters:
b - the data to be written
off - the start offset in the data
len - the number of bytes that are written
Throws:
ZipException - if a ZIP file error has occurred
IOException - if an I/O error has occurred
See Also:
FilterOutputStream.write(int)

finish

public void finish()
            throws IOException
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.

Overrides:
finish in class DeflaterOutputStream
Throws:
ZipException - if a ZIP file error has occurred
IOException - if an I/O exception has occurred

close

public void close()
           throws IOException
Closes the ZIP output stream as well as the stream being filtered.

Specified by:
close in interface Closeable
Overrides:
close in class DeflaterOutputStream
Throws:
ZipException - if a ZIP file error has occurred
IOException - if an I/O error has occurred
See Also:
FilterOutputStream.flush(), FilterOutputStream.out

Java™ Platform
Standard Ed. 6

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