Java using gzip to implement file decompression sample _java

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Package com.cjonline.foundation.cpe.action;

Import Java.io.ByteArrayInputStream;
Import Java.io.ByteArrayOutputStream;
Import Java.io.File;
Import Java.io.FileInputStream;
Import Java.io.FileOutputStream;
Import Java.io.InputStream;
Import Java.io.OutputStream;
Import Java.util.zip.GZIPInputStream;
Import Java.util.zip.GZIPOutputStream;

Public abstract class Gziputils {

public static final int BUFFER = 1024;
public static final String EXT = ". Gz";

/**
* Data compression
*
* @param data
* @return
* @throws Exception
*/
public static byte[] Compress (byte[] data) throws Exception {
Bytearrayinputstream Bais = new Bytearrayinputstream (data);
Bytearrayoutputstream BAOs = new Bytearrayoutputstream ();

Compression
Compress (Bais, BAOs);

byte[] output = Baos.tobytearray ();

Baos.flush ();
Baos.close ();

Bais.close ();

return output;
}

/**
* File compression
*
* @param file
* @throws Exception
*/
public static void Compress (file file) throws Exception {
Compress (file, true);
}

/**
* File compression
*
* @param file
* @param Delete
* Whether to delete the original file
* @throws Exception
*/
public static void Compress (file file, Boolean delete) throws Exception {
FileInputStream fis = new FileInputStream (file);
FileOutputStream fos = new FileOutputStream (File.getpath () + EXT);

Compress (FIS, FOS);

Fis.close ();
Fos.flush ();
Fos.close ();

if (delete) {
File.delete ();
}
}

/**
* Data compression
*
* @param is
* @param os
* @throws Exception
*/
public static void Compress (InputStream is, OutputStream OS)
Throws Exception {

Gzipoutputstream Gos = new Gzipoutputstream (OS);

int count;
byte data[] = new Byte[buffer];
while (count = is.read (data, 0, BUFFER)!=-1) {
Gos.write (data, 0, count);
}

Gos.finish ();

Gos.flush ();
Gos.close ();
}

/**
* File compression
*
* @param path
* @throws Exception
*/
public static void Compress (String path) throws Exception {
Compress (path, true);
}

/**
* File compression
*
* @param path
* @param Delete
* Whether to delete the original file
* @throws Exception
*/
public static void Compress (String path, Boolean delete) throws Exception {
File File = new file (path);
Compress (file, delete);
}

/**
* Data Decompression
*
* @param data
* @return
* @throws Exception
*/
public static byte[] Decompress (byte[] data) throws Exception {
Bytearrayinputstream Bais = new Bytearrayinputstream (data);
Bytearrayoutputstream BAOs = new Bytearrayoutputstream ();

Decompression

Decompress (Bais, BAOs);

data = Baos.tobytearray ();

Baos.flush ();
Baos.close ();

Bais.close ();

return data;
}

/**
* File Uncompressed
*
* @param file
* @throws Exception
*/
public static void decompress (file file) throws Exception {
Decompress (file, true);
}

/**
* File Uncompressed
*
* @param file
* @param Delete
* Whether to delete the original file
* @throws Exception
*/
public static void decompress (file file, Boolean delete) throws Exception {
FileInputStream fis = new FileInputStream (file);
FileOutputStream fos = new FileOutputStream (File.getpath (). replace (EXT,
""));
Decompress (FIS, FOS);
Fis.close ();
Fos.flush ();
Fos.close ();

if (delete) {
File.delete ();
}
}

/**
* Data Decompression
*
* @param is
* @param os
* @throws Exception
*/
public static void Decompress (InputStream is, OutputStream OS)
Throws Exception {

Gzipinputstream GIS = new Gzipinputstream (IS);

int count;
byte data[] = new Byte[buffer];
while (count = gis.read (data, 0, BUFFER)!=-1) {
Os.write (data, 0, count);
}

Gis.close ();
}

/**
* File Uncompressed
*
* @param path
* @throws Exception
*/
public static void Decompress (String path) throws Exception {
Decompress (path, true);
}

/**
* File Uncompressed
*
* @param path
* @param Delete
* Whether to delete the original file
* @throws Exception
*/
public static void Decompress (String path, Boolean delete) throws Exception {
File File = new file (path);
Decompress (file, delete);
}
}