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JDK 5 Documentation v1.2.2, Java 2 SDK 英文文档
Java(TM) 2 Platform, Standard Edition, v1.2.2 API Specification: Class ZipInputStream - JDK 5 Documentation v1.2.2, Java 2 SDK 英文文档
java.util.zip
Class ZipInputStream
java.lang.Object
|
+--java.io.InputStream
|
+--java.io.FilterInputStream
|
+--java.util.zip.InflaterInputStream
|
+--java.util.zip.ZipInputStream
- Direct Known Subclasses:
- JarInputStream
- public class ZipInputStream
- extends InflaterInputStream
- implements java.util.zip.ZipConstants
This class implements an input stream filter for reading files in the
ZIP file format. Includes support for both compressed and uncompressed
entries.
Fields inherited from interface java.util.zip.ZipConstants |
CENATT,
CENATX,
CENCOM,
CENCRC,
CENDSK,
CENEXT,
CENFLG,
CENHDR,
CENHOW,
CENLEN,
CENNAM,
CENOFF,
CENSIG,
CENSIZ,
CENTIM,
CENVEM,
CENVER,
ENDCOM,
ENDHDR,
ENDOFF,
ENDSIG,
ENDSIZ,
ENDSUB,
ENDTOT,
EXTCRC,
EXTHDR,
EXTLEN,
EXTSIG,
EXTSIZ,
LOCCRC,
LOCEXT,
LOCFLG,
LOCHDR,
LOCHOW,
LOCLEN,
LOCNAM,
LOCSIG,
LOCSIZ,
LOCTIM,
LOCVER |
Method Summary |
int |
available()
Returns 0 after EOF has reached for the current entry data,
otherwise always return 1. |
void |
close()
Closes the ZIP input stream. |
void |
closeEntry()
Closes the current ZIP entry and positions the stream for reading the
next entry. |
protected ZipEntry |
createZipEntry(String name)
Creates a new ZipEntry object for the specified
entry name. |
ZipEntry |
getNextEntry()
Reads the next ZIP file entry and positions 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.lang.Object |
clone,
equals,
finalize,
getClass,
hashCode,
notify,
notifyAll,
toString,
wait,
wait,
wait |
ZipInputStream
public ZipInputStream(InputStream in)
- Creates a new ZIP input stream.
- Parameters:
in
- the actual input stream
getNextEntry
public ZipEntry getNextEntry()
throws IOException
- Reads the next ZIP file entry and positions stream at the beginning
of the entry data.
- Throws:
- ZipException - if a ZIP file 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 reading the
next entry.
- Throws:
- ZipException - if a ZIP file error has occurred
- IOException - if an I/O error has occurred
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 class InflaterInputStream
- Returns:
- 1 before EOF and 0 after EOF has reached for current entry.
- Throws:
- IOException - if an I/O error occurs.
read
public int read(byte[] b,
int off,
int len)
throws IOException
- Reads from the current ZIP entry into an array of bytes. Blocks until
some input is available.
- Overrides:
- read in class InflaterInputStream
- Parameters:
b
- the buffer into which the data is readoff
- the start offset of the datalen
- the maximum number of bytes read- Returns:
- the actual number of bytes read, or -1 if the end of the
entry is reached
- Throws:
- ZipException - if a ZIP file error has occurred
- IOException - if an I/O error has occurred
skip
public long skip(long n)
throws IOException
- Skips specified number of bytes in the current ZIP entry.
- Overrides:
- skip in class InflaterInputStream
- Parameters:
n
- the number of bytes to skip- Returns:
- the actual number of bytes skipped
- Throws:
- ZipException - if a ZIP file error has occurred
- IOException - if an I/O error has occurred
- IllegalArgumentException - if n < 0
close
public void close()
throws IOException
- Closes the ZIP input stream.
- Overrides:
- close in class InflaterInputStream
- Throws:
- IOException - if an I/O error has occurred
createZipEntry
protected ZipEntry createZipEntry(String name)
- Creates a new
ZipEntry
object for the specified
entry name.
- Parameters:
name
- the ZIP file entry name
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