Class JarOutputStream

java.lang.Object
java.io.OutputStream
java.io.FilterOutputStream
java.util.zip.DeflaterOutputStream
java.util.zip.ZipOutputStream
java.util.jar.JarOutputStream
All Implemented Interfaces:
Closeable, Flushable, AutoCloseable
public class JarOutputStream extends ZipOutputStream
The JarOutputStream class is used to write the contents of a JAR file to any output stream. It extends the class java.util.zip.ZipOutputStream with support for writing an optional Manifest entry. The Manifest can be used to specify meta-information about the JAR file and its entries.

Unless otherwise noted, passing a null argument to a constructor or method in this class will cause a NullPointerException to be thrown.

Since:
1.2
See Also:

  • Field Summary Link icon

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

    Fields declared in class java.util.zip.ZipOutputStream Link icon

    DEFLATED, STORED

    Fields declared in class java.util.zip.DeflaterOutputStream Link icon

    buf, def

    Fields declared in class java.io.FilterOutputStream Link icon

    out

  • Constructor Summary Link icon

    Constructors
    Constructor
    Description
    JarOutputStream(OutputStream out)
    Creates a new JarOutputStream with no manifest.
    JarOutputStream(OutputStream out, Manifest man)
    Creates a new JarOutputStream with the specified Manifest.

  • Method Summary Link icon

    Modifier and Type
    Method
    Description
    void
    putNextEntry(ZipEntry ze)
    Begins writing a new JAR file entry and positions the stream to the start of the entry data.

    Methods declared in class java.util.zip.ZipOutputStream Link icon

    close, closeEntry, finish, setComment, setLevel, setMethod, write

    Methods declared in class java.util.zip.DeflaterOutputStream Link icon

    deflate, flush, write

    Methods declared in class java.io.FilterOutputStream Link icon

    write

    Methods declared in class java.io.OutputStream Link icon

    nullOutputStream

    Methods declared in class java.lang.Object Link icon

    clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

  • Field Details Link icon

    • LOCSIG Link icon

      static final long LOCSIG
      Local file (LOC) header signature.
      See Also:

    • EXTSIG Link icon

      static final long EXTSIG
      Extra local (EXT) header signature.
      See Also:

    • CENSIG Link icon

      static final long CENSIG
      Central directory (CEN) header signature.
      See Also:

    • ENDSIG Link icon

      static final long ENDSIG
      End of central directory (END) header signature.
      See Also:

    • LOCHDR Link icon

      static final int LOCHDR
      Local file (LOC) header size in bytes (including signature).
      See Also:

    • EXTHDR Link icon

      static final int EXTHDR
      Extra local (EXT) header size in bytes (including signature).
      See Also:

    • CENHDR Link icon

      static final int CENHDR
      Central directory (CEN) header size in bytes (including signature).
      See Also:

    • ENDHDR Link icon

      static final int ENDHDR
      End of central directory (END) header size in bytes (including signature).
      See Also:

    • LOCVER Link icon

      static final int LOCVER
      Local file (LOC) header version needed to extract field offset.
      See Also:

    • LOCFLG Link icon

      static final int LOCFLG
      Local file (LOC) header general purpose bit flag field offset.
      See Also:

    • LOCHOW Link icon

      static final int LOCHOW
      Local file (LOC) header compression method field offset.
      See Also:

    • LOCTIM Link icon

      static final int LOCTIM
      Local file (LOC) header modification time field offset.
      See Also:

    • LOCCRC Link icon

      static final int LOCCRC
      Local file (LOC) header uncompressed file crc-32 value field offset.
      See Also:

    • LOCSIZ Link icon

      static final int LOCSIZ
      Local file (LOC) header compressed size field offset.
      See Also:

    • LOCLEN Link icon

      static final int LOCLEN
      Local file (LOC) header uncompressed size field offset.
      See Also:

    • LOCNAM Link icon

      static final int LOCNAM
      Local file (LOC) header filename length field offset.
      See Also:

    • LOCEXT Link icon

      static final int LOCEXT
      Local file (LOC) header extra field length field offset.
      See Also:

    • EXTCRC Link icon

      static final int EXTCRC
      Extra local (EXT) header uncompressed file crc-32 value field offset.
      See Also:

    • EXTSIZ Link icon

      static final int EXTSIZ
      Extra local (EXT) header compressed size field offset.
      See Also:

    • EXTLEN Link icon

      static final int EXTLEN
      Extra local (EXT) header uncompressed size field offset.
      See Also:

    • CENVEM Link icon

      static final int CENVEM
      Central directory (CEN) header version made by field offset.
      See Also:

    • CENVER Link icon

      static final int CENVER
      Central directory (CEN) header version needed to extract field offset.
      See Also:

    • CENFLG Link icon

      static final int CENFLG
      Central directory (CEN) header encrypt, decrypt flags field offset.
      See Also:

    • CENHOW Link icon

      static final int CENHOW
      Central directory (CEN) header compression method field offset.
      See Also:

    • CENTIM Link icon

      static final int CENTIM
      Central directory (CEN) header modification time field offset.
      See Also:

    • CENCRC Link icon

      static final int CENCRC
      Central directory (CEN) header uncompressed file crc-32 value field offset.
      See Also:

    • CENSIZ Link icon

      static final int CENSIZ
      Central directory (CEN) header compressed size field offset.
      See Also:

    • CENLEN Link icon

      static final int CENLEN
      Central directory (CEN) header uncompressed size field offset.
      See Also:

    • CENNAM Link icon

      static final int CENNAM
      Central directory (CEN) header filename length field offset.
      See Also:

    • CENEXT Link icon

      static final int CENEXT
      Central directory (CEN) header extra field length field offset.
      See Also:

    • CENCOM Link icon

      static final int CENCOM
      Central directory (CEN) header comment length field offset.
      See Also:

    • CENDSK Link icon

      static final int CENDSK
      Central directory (CEN) header disk number start field offset.
      See Also:

    • CENATT Link icon

      static final int CENATT
      Central directory (CEN) header internal file attributes field offset.
      See Also:

    • CENATX Link icon

      static final int CENATX
      Central directory (CEN) header external file attributes field offset.
      See Also:

    • CENOFF Link icon

      static final int CENOFF
      Central directory (CEN) header LOC header offset field offset.
      See Also:

    • ENDSUB Link icon

      static final int ENDSUB
      End of central directory (END) header number of entries on this disk field offset.
      See Also:

    • ENDTOT Link icon

      static final int ENDTOT
      End of central directory (END) header total number of entries field offset.
      See Also:

    • ENDSIZ Link icon

      static final int ENDSIZ
      End of central directory (END) header central directory size in bytes field offset.
      See Also:

    • ENDOFF Link icon

      static final int ENDOFF
      End of central directory (END) header offset for the first CEN header field offset.
      See Also:

    • ENDCOM Link icon

      static final int ENDCOM
      End of central directory (END) header ZIP file comment length field offset.
      See Also:

  • Constructor Details Link icon

    • JarOutputStream Link icon

      public JarOutputStream(OutputStream out, Manifest man) throws IOException
      Creates a new JarOutputStream with the specified Manifest. The manifest is written as the first entry to the output stream.
      Parameters:
      out - the actual output stream
      man - the optional Manifest
      Throws:
      IOException - if an I/O error has occurred

    • JarOutputStream Link icon

      public JarOutputStream(OutputStream out) throws IOException
      Creates a new JarOutputStream with no manifest.
      Parameters:
      out - the actual output stream
      Throws:
      IOException - if an I/O error has occurred

  • Method Details Link icon

    • putNextEntry Link icon

      public void putNextEntry(ZipEntry ze) throws IOException
      Begins writing a new JAR file entry and positions the stream to the start of the entry data. This method will also close any previous entry.

      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.

      Overrides:
      putNextEntry in class ZipOutputStream
      Parameters:
      ze - the ZIP/JAR entry to be written
      Throws:
      ZipException - if a ZIP error has occurred
      IOException - if an I/O error has occurred