Class ZipOutputStream

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

All Implemented Interfaces:: Closeable, Flushable, AutoCloseable

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.

Since:: 1.1

Field Summary

Fields
Modifier and Type	Field	Description
`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 declared in class java.util.zip.DeflaterOutputStream

buf, def

Fields declared in class java.io.FilterOutputStream

out

Constructor Summary

Constructors
Constructor	Description
`ZipOutputStream(OutputStream out)`	Creates a new ZIP output stream.
`ZipOutputStream(OutputStream out, Charset charset)`	Creates a new ZIP output stream.

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`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 declared in class java.util.zip.DeflaterOutputStream

deflate, flush, write

Methods declared in class java.io.FilterOutputStream

write

Methods declared in class java.io.OutputStream

nullOutputStream

Methods declared in 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.

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

Parameters:: out - the actual output stream

ZipOutputStream

public ZipOutputStream(OutputStream out,
                       Charset charset)

Creates a new ZIP output stream.

Parameters:: out - the actual output stream; charset - the charset to be used to encode the entry names and comments
Since:: 1.7

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 AutoCloseable
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