Your SlideShare is downloading. ×
ZIP, GZIP Streams in java
Upcoming SlideShare
Loading in...5
×

Thanks for flagging this SlideShare!

Oops! An error has occurred.

×
Saving this for later? Get the SlideShare app to save on your phone or tablet. Read anywhere, anytime – even offline.
Text the download link to your phone
Standard text messaging rates apply

ZIP, GZIP Streams in java

1,437
views

Published on

It's about gzip and zip streams in java se.

It's about gzip and zip streams in java se.

Published in: Education

0 Comments
1 Like
Statistics
Notes
  • Be the first to comment

No Downloads
Views
Total Views
1,437
On Slideshare
0
From Embeds
0
Number of Embeds
0
Actions
Shares
0
Downloads
21
Comments
0
Likes
1
Embeds 0
No embeds

Report content
Flagged as inappropriate Flag as inappropriate
Flag as inappropriate

Select your reason for flagging this presentation as inappropriate.

Cancel
No notes for slide




























































  • Transcript

    • 1. Язык Java Работа с архивами java.util.zip java.util.jar
    • 2. GZipInputStream
      • class GZIPInputStream extends InflaterInputStream
      • public GZIPInputStream(InputStream in, int size) throws IOException
      • public GZIPInputStream(InputStream in) throws IOException
      • public int read(byte[] buf, int off, int len) throws IOException
      • public void close() throws IOException
    • 3. GZipOutputStream
      • class GZIPOutputStream extends DeflaterOutputStream
      • public GZIPOutputStream(OutputStream out, int size)
      • public GZIPOutputStream(OutputStream out) throws IOException
      • public synchronized void write(byte[] buf, int off, int len) throws IOException
      • public void finish() throws IOException
    • 4. Пример использования (упаковка)
      • FileInputStream fi=null; try{ try{ fi=new FileInputStream("in.txt"); go=new GZIPOutputStream(new BufferedOutputStream(new FileOutputStream("out.gz"))); int l=fi.available(); byte[] b=new byte[l]; fi.read(b); go.write(b); } finally{ if(go!=null) go.close(); if(fi!=null) fi.close(); } }catch(Exception e) { System.out.println(e); }
    • 5. Пример использования (распаковка)
      • BufferedOutputStream bo = null; try { try { gi = new GZIPInputStream(new BufferedInputStream(new FileInputStream("out.gz"))); int i=0; bo = new BufferedOutputStream(new FileOutputStream("out2.txt")); while((i=gi.read())!=-1) bo.write(i); } finally { if (gi != null) gi.close(); if (bo != null) bo.close(); } } catch (Exception e) { System.out.println(e); }
    • 6. ZipInputStream
      • class ZipInputStream extends InflaterInputStream implements ZipConstants
      • public ZipInputStream(InputStream in)
      • public ZipEntry getNextEntry() throws IOException
      • public void closeEntry() throws IOException
      • public int available() throws IOException
      • public int read(byte[] b, int off, int len) throws IOException
      • public long skip(long n) throws IOException
      • public void close() throws IOException
    • 7. ZipOutputStream
      • class ZipOutputStream extends DeflaterOutputStream implements ZipConstants
      • public ZipOutputStream(OutputStream out)
      • public void setComment(String comment)
      • public void setMethod(int method)
      • public void setLevel(int level)
      • public void putNextEntry(ZipEntry e) throws IOException
      • public void closeEntry() throws IOException
      • public synchronized void write(byte[] b, int off, int len)
      • public void finish() throws IOException
      • public void close() throws IOException
    • 8. ZipEntry
      • class ZipEntry implements ZipConstants, Cloneable
      • public ZipEntry(String name)
      • public ZipEntry(ZipEntry e)
      • public String getName()
      • public void setTime(long time)
      • public long getTime()
      • public void setSize(long size)
      • public long getSize()
      • public long getCompressedSize()
      • public void setCompressedSize(long csize)
      • public void setMethod(int method)
      • public int getMethod()
      • public void setExtra(byte[] extra)
      • public byte[] getExtra()
      • public void setComment(String comment)
      • public String getComment()
    • 9. Пример использования
      • public void createZip() { try { try { zo = new ZipOutputStream(new BufferedOutputStream(new FileOutputStream(s+".zip"))); File f=new File(s); String s1=f.getPath(); addFolderToZip(zo,f.getName(),f); } finally { if (zo != null) { zo.close(); } } } catch (Exception e) { System.out.println(e); } }
    • 10. Пример использования (продолжение)
      • public void addFolderToZip(ZipOutputStream zo, String path, File dir) { File[] fs = dir.listFiles(); for (File f : fs) { if (f.isFile()) { addFile(zo, path, f); } else { addFolderToZip(zo, path+"amp;quot;+f.getName(), f); } } }
    • 11. Пример использования (продолжение)
      • public void addFile(ZipOutputStream zo, String path, File f) { ZipEntry ze = new ZipEntry(path+"amp;quot;+f.getName()); BufferedInputStream bi = null; try { try { zo.putNextEntry(ze); bi = new BufferedInputStream(new FileInputStream(f.getPath())); byte[] b = new byte[1024]; int i = 0; while ((i = bi.read(b)) != -1) zo.write(b, 0, i); } finally { zo.closeEntry(); if (bi != null) bi.close(); } } catch (IOException e) { System.out.println(e); } }
    • 12. Конец Вопросы e-mail: a.bovanenko@gmail.com