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Class java.util.zip.ZipOutputStream 

java.lang.Object
   |
   +----java.io.OutputStream
           |
           +----java.io.FilterOutputStream
                   |
                   +----java.util.zip.DeflaterOutputStream
                           |
                           +----java.util.zip.ZipOutputStream
public class ZipOutputStream
extends DeflaterOutputStream
implements ZipConstants
This class implements an output stream filter for writing files in the ZIP file format. Includes support for both compressed and uncompressed entries.

Variable Index

o DEFLATED
Compression method for compressed (DEFLATED) entries.
o STORED
Compression method for uncompressed (STORED) entries.

Constructor Index

o ZipOutputStream(OutputStream)
Creates a new ZIP output stream.

Method Index

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

Variables

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

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

Constructors

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

Parameters:
out - the actual output stream

Methods

o 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
o 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
o 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
o 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
Throws: IOException
if an I/O error has occurred
o 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
Throws: IOException
if an I/O error has occurred
o write 
 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
o 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.

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