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Class java.util.zip.ZipOutputStream

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

public class ZipOutputStream

extends DeflaterOutputStream

implements ZipConstants

DEFLATED

Compression method for compressed (DEFLATED) entries.

STORED

Compression method for uncompressed (STORED) entries.

ZipOutputStream(OutputStream)

Creates a new ZIP output stream.

close()

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

closeEntry()

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

finish()

Finishes writing the contents of the ZIP output stream without closing the underlying stream.

putNextEntry(ZipEntry)

Begins writing a new ZIP file entry and positions the stream to the start of the entry data.

setComment(String)

Sets the ZIP file comment.

setLevel(int)

Sets the compression level for subsequent entries which are DEFLATED.

setMethod(int)

Sets the default compression method for subsequent entries.

write(byte[], int, int)

Writes an array of bytes to the current ZIP entry data.

public static final int STORED

Compression method for uncompressed (STORED) entries.

public static final int DEFLATED

Compression method for compressed (DEFLATED) entries.

public ZipOutputStream(OutputStream out)

Creates a new ZIP output stream.

Parameters:

out - the actual output stream

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

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

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

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

Throws: IOException

if an I/O error has occurred

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

Throws: IOException

if an I/O error has occurred

public synchronized 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.

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

Throws: IOException

if an I/O error has occurred

Overrides:

write in class DeflaterOutputStream

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.

Throws: ZipException

if a ZIP file error has occurred

Throws: IOException

if an I/O exception has occurred

Overrides:

finish in class DeflaterOutputStream

public void close() throws IOException

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

Throws: ZipException

if a ZIP file error has occurred

Throws: IOException

if an I/O error has occurred

Overrides:

close in class DeflaterOutputStream

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