- java.lang.Object
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- java.io.InputStream
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- java.io.FilterInputStream
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- java.util.zip.InflaterInputStream
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- java.util.zip.ZipInputStream
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- All Implemented Interfaces:
- Closeable, AutoCloseable
- Direct Known Subclasses:
- JarInputStream
public class ZipInputStream extends InflaterInputStream
This class implements an input stream filter for reading files in the ZIP file format. Includes support for both compressed and uncompressed entries.
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Field Summary
Fields Modifier and Type Field and 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
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
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Fields inherited from class java.io.FilterInputStream
in
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Constructor Summary
Constructors Constructor and Description ZipInputStream(InputStream in)
Creates a new ZIP input stream.ZipInputStream(InputStream in, Charset charset)
Creates a new ZIP input stream.
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Method Summary
Methods Modifier and Type Method and Description int
available()
Returns 0 after EOF has reached for the current entry data, otherwise always return 1.void
close()
Closes this input stream and releases any system resources associated with the stream.void
closeEntry()
Closes the current ZIP entry and positions the stream for reading the next entry.protected ZipEntry
createZipEntry(String name)
Creates a newZipEntry
object for the specified entry name.ZipEntry
getNextEntry()
Reads the next ZIP file entry and positions the stream at the beginning of the entry data.int
read(byte[] b, int off, int len)
Reads from the current ZIP entry into an array of bytes.long
skip(long n)
Skips specified number of bytes in the current ZIP entry.-
Methods inherited from class java.util.zip.InflaterInputStream
fill, mark, markSupported, read, reset
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Methods inherited from class java.io.FilterInputStream
read
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Field Detail
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LOCSIG
public static final long LOCSIG
- See Also:
- Constant Field Values
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EXTSIG
public static final long EXTSIG
- See Also:
- Constant Field Values
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CENSIG
public static final long CENSIG
- See Also:
- Constant Field Values
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ENDSIG
public static final long ENDSIG
- See Also:
- Constant Field Values
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LOCHDR
public static final int LOCHDR
- See Also:
- Constant Field Values
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EXTHDR
public static final int EXTHDR
- See Also:
- Constant Field Values
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CENHDR
public static final int CENHDR
- See Also:
- Constant Field Values
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ENDHDR
public static final int ENDHDR
- See Also:
- Constant Field Values
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LOCVER
public static final int LOCVER
- See Also:
- Constant Field Values
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LOCFLG
public static final int LOCFLG
- See Also:
- Constant Field Values
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LOCHOW
public static final int LOCHOW
- See Also:
- Constant Field Values
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LOCTIM
public static final int LOCTIM
- See Also:
- Constant Field Values
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LOCCRC
public static final int LOCCRC
- See Also:
- Constant Field Values
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LOCSIZ
public static final int LOCSIZ
- See Also:
- Constant Field Values
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LOCLEN
public static final int LOCLEN
- See Also:
- Constant Field Values
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LOCNAM
public static final int LOCNAM
- See Also:
- Constant Field Values
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LOCEXT
public static final int LOCEXT
- See Also:
- Constant Field Values
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EXTCRC
public static final int EXTCRC
- See Also:
- Constant Field Values
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EXTSIZ
public static final int EXTSIZ
- See Also:
- Constant Field Values
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EXTLEN
public static final int EXTLEN
- See Also:
- Constant Field Values
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CENVEM
public static final int CENVEM
- See Also:
- Constant Field Values
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CENVER
public static final int CENVER
- See Also:
- Constant Field Values
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CENFLG
public static final int CENFLG
- See Also:
- Constant Field Values
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CENHOW
public static final int CENHOW
- See Also:
- Constant Field Values
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CENTIM
public static final int CENTIM
- See Also:
- Constant Field Values
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CENCRC
public static final int CENCRC
- See Also:
- Constant Field Values
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CENSIZ
public static final int CENSIZ
- See Also:
- Constant Field Values
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CENLEN
public static final int CENLEN
- See Also:
- Constant Field Values
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CENNAM
public static final int CENNAM
- See Also:
- Constant Field Values
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CENEXT
public static final int CENEXT
- See Also:
- Constant Field Values
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CENCOM
public static final int CENCOM
- See Also:
- Constant Field Values
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CENDSK
public static final int CENDSK
- See Also:
- Constant Field Values
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CENATT
public static final int CENATT
- See Also:
- Constant Field Values
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CENATX
public static final int CENATX
- See Also:
- Constant Field Values
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CENOFF
public static final int CENOFF
- See Also:
- Constant Field Values
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ENDSUB
public static final int ENDSUB
- See Also:
- Constant Field Values
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ENDTOT
public static final int ENDTOT
- See Also:
- Constant Field Values
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ENDSIZ
public static final int ENDSIZ
- See Also:
- Constant Field Values
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ENDOFF
public static final int ENDOFF
- See Also:
- Constant Field Values
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ENDCOM
public static final int ENDCOM
- See Also:
- Constant Field Values
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Constructor Detail
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ZipInputStream
public ZipInputStream(InputStream in)
Creates a new ZIP input stream.The UTF-8
charset
is used to decode the entry names.- Parameters:
in
- the actual input stream
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ZipInputStream
public ZipInputStream(InputStream in, Charset charset)
Creates a new ZIP input stream.- Parameters:
in
- the actual input streamcharset
- The charset to be used to decode the ZIP entry name (ignored if the language encoding bit of the ZIP entry's general purpose bit flag is set).- Since:
- 1.7
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Method Detail
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getNextEntry
public ZipEntry getNextEntry() throws IOException
Reads the next ZIP file entry and positions the stream at the beginning of the entry data.- Returns:
- the next ZIP file entry, or null if there are no more entries
- Throws:
ZipException
- if a ZIP file error has occurredIOException
- if an I/O error has occurred
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closeEntry
public void closeEntry() throws IOException
Closes the current ZIP entry and positions the stream for reading the next entry.- Throws:
ZipException
- if a ZIP file error has occurredIOException
- if an I/O error has occurred
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available
public int available() throws IOException
Returns 0 after EOF has reached for the current entry data, otherwise always return 1.Programs should not count on this method to return the actual number of bytes that could be read without blocking.
- Overrides:
available
in classInflaterInputStream
- Returns:
- 1 before EOF and 0 after EOF has reached for current entry.
- Throws:
IOException
- if an I/O error occurs.
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read
public int read(byte[] b, int off, int len) throws IOException
Reads from the current ZIP entry into an array of bytes. Iflen
is not zero, the method blocks until some input is available; otherwise, no bytes are read and0
is returned.- Overrides:
read
in classInflaterInputStream
- Parameters:
b
- the buffer into which the data is readoff
- the start offset in the destination arrayb
len
- the maximum number of bytes read- Returns:
- the actual number of bytes read, or -1 if the end of the entry is reached
- Throws:
NullPointerException
- ifb
isnull
.IndexOutOfBoundsException
- ifoff
is negative,len
is negative, orlen
is greater thanb.length - off
ZipException
- if a ZIP file error has occurredIOException
- if an I/O error has occurred- See Also:
FilterInputStream.in
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skip
public long skip(long n) throws IOException
Skips specified number of bytes in the current ZIP entry.- Overrides:
skip
in classInflaterInputStream
- Parameters:
n
- the number of bytes to skip- Returns:
- the actual number of bytes skipped
- Throws:
ZipException
- if a ZIP file error has occurredIOException
- if an I/O error has occurredIllegalArgumentException
- if n < 0
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close
public void close() throws IOException
Closes this input stream and releases any system resources associated with the stream.- Specified by:
close
in interfaceCloseable
- Specified by:
close
in interfaceAutoCloseable
- Overrides:
close
in classInflaterInputStream
- Throws:
IOException
- if an I/O error has occurred- See Also:
FilterInputStream.in
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Vielen Dank im Voraus.
Dokument erstellt 11/06/2005, zuletzt geändert 04/03/2020
Quelle des gedruckten Dokuments:https://www.gaudry.be/de/java-api-rf-java/util/zip/zipinputstream.html
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