Questa classe viene utilizzata per rappresentare una voce di file ZIP. Costruttori
ZipEntry(nome stringa):
Crea una nuova voce zip con il nome specificato.
ZipEntry(ZipEntry e) :
Crea una nuova voce zip con i campi presi dalla voce zip specificata. Metodi:
Clone oggetto() :
Returns a copy of this entry.
Syntax : public Object clone() Overrides: clone in class Object Returns: a clone of this instance.
String getComment() :
Returns the comment string for the entry or null if none.
Syntax : public String getComment() Returns: the comment string for the entry or null if none
long getCompressedSize() :
Returns the size of the compressed entry data or -1 if not known.In the case of a stored entry the compressed size will be the same as the uncompressed size of the entry.
Syntax : public long getCompressedSize() Returns: the size of the compressed entry data or -1 if not known
lungo getCrc() :
Returns the CRC-32 checksum of the uncompressed entry data or -1 if not known.
Syntax : public long getCrc() Returns: the CRC-32 checksum of the uncompressed entry data or -1 if not known
byte[] getExtra() :
Returns the extra field data for the entry or null if none.
Syntax : =public byte[] getExtra() Returns: the extra field data for the entry or null if none
int getMethod() :
Returns the compression method of the entry or -1 if not specified.
Syntax : public int getMethod() Returns: the compression method of the entry or -1 if not specified
String getNome() :
Returns the name of the entry.
Syntax : public String getName() Returns: the name of the entry
lungo getSize() :
Returns the uncompressed size of the entry data or -1 if not known.
Syntax : public long getSize() Returns: the uncompressed size of the entry data or -1 if not know
lungo getTime() :
Returns the modification time of the entry or -1 if not specified.
Syntax : public long getTime() Returns: the modification time of the entry or -1 if not specified
int codicehash() :
Returns the hash code value for this entry.
Syntax : public int hashCode() Overrides: hashCode in class Object Returns: a hash code value for this object.
booleano isDirectory() :
Returns true if this is a directory entry. A directory entry is defined to be one whose name ends with a '/'.
Syntax : public boolean isDirectory() Returns: true if this is a directory entry
void setCommento(Stringa commento):
Sets the optional comment string for the entry.ZIP entry comments have maximum length of 0xffff. If the length of the specified comment string is greater than 0xFFFF bytes after encoding only the first 0xFFFF bytes are output to the ZIP file entry.
Syntax : public void setComment(String comment) Parameters: comment - the comment string
void setCompressedSize(long csize):
Sets the size of the compressed entry data.
Syntax : public void setCompressedSize(long csize) Parameters: csize - the compressed size to set to
void setCrc(crc lungo):
Sets the CRC-32 checksum of the uncompressed entry data.
Syntax : public void setCrc(long crc) Parameters: crc - the CRC-32 value Throws: IllegalArgumentException
void setExtra(byte[] extra):
Sets the optional extra field data for the entry.
Syntax : public void setExtra(byte[] extra) Parameters: extra - the extra field data bytes Throws: IllegalArgumentException
void setMethod(metodo int):
Sets the compression method for the entry.
Syntax : public void setMethod(int method) Parameters: method - the compression method either STORED or DEFLATED Throws: IllegalArgumentException
void setSize(dimensione lunga):
Sets the uncompressed size of the entry data.
Syntax : public void setSize(long size) Parameters: size - the uncompressed size in bytes Throws: IllegalArgumentException
void setTime(molto tempo):
Sets the modification time of the entry.
Syntax : public void setTime(long time) Parameters: time - the entry modification time in number of milliseconds since the epoch
Stringa aString() :
Returns a string representation of the ZIP entry.
Syntax : public String toString() Overrides: toString in class Object Returns: a string representation of the object.
Programma: Java
//Java program demonstrating ZipEntry methodsimportjava.io.FileInputStream;importjava.io.IOException;importjava.io.PrintStream;importjava.nio.file.attribute.FileTime;importjava.util.concurrent.TimeUnit;importjava.util.zip.ZipEntry;importjava.util.zip.ZipInputStream;classZipEntryDemo{publicstaticvoidmain(String[]args)throwsIOException{FileInputStreamfis=newFileInputStream('Awesome CV.zip');ZipInputStreamjis=newZipInputStream(fis);PrintStreamcout=System.out;//reading the next ZIP file entryZipEntryze=jis.getNextEntry();//illustrating getName()cout.println(ze.getName());//illustrating getComment()ze.setComment('This is a comment');cout.println(ze.getComment());//illustrating setCompressedSize() and getCompressedSize()ze.setCompressedSize(23l);cout.println('CompressedSize of the entry = '+ze.getCompressedSize());//illustrating getSize() and setSize()ze.setSize(53l);cout.println('Size = '+ze.getSize());//illustrating getCrc() and setCrc()ze.setCrc(01);cout.println(ze.getCrc());//illustrating getMethod and setMethodze.setMethod(ZipEntry.STORED);cout.println(ze.getMethod());//illustrating getCreation and setCreation()ze.setCreationTime(FileTime.from(10000TimeUnit.DAYS));cout.println(ze.getCreationTime());//illustrating getLastAccessTime and setLastAccessTimeze.setLastAccessTime(FileTime.from(1000TimeUnit.DAYS));cout.println(ze.getLastAccessTime());//illustrating clone()ZipEntryzeclone=(ZipEntry)ze.clone();cout.println(zeclone.getName());//illustrating isDirectorycout.println(ze.isDirectory());//illustrating hashcode()cout.println('hashcode = '+ze.hashCode());}}
Produzione :
awesome-cv.cls This is a comment CompressedSize of the entry = 23 Size = 53 1 0 1997-05-19T00:00:00Z 1972-09-27T00:00:00Z awesome-cv.cls false hashcode = 1687382489