java解压gz文件,这个是在linux下实验过的
下面是网上的代码
http://www.iteye.com/topic/894879
import java.io.FileInputStream; import java.io.FileNotFoundException; import java.io.FileOutputStream; import java.io.IOException; import java.util.zip.GZIPOutputStream; public class CompressFileGZIP { private static void doCompressFile(String inFileName) { try { System.out.println("Creating the GZIP output stream."); String outFileName = inFileName + ".gz"; GZIPOutputStream out = null; try { out = new GZIPOutputStream(new FileOutputStream(outFileName)); } catch(FileNotFoundException e) { System.err.println("Could not create file: " + outFileName); System.exit(1); } System.out.println("Opening the input file."); FileInputStream in = null; try { in = new FileInputStream(inFileName); } catch (FileNotFoundException e) { System.err.println("File not found. " + inFileName); System.exit(1); } System.out.println("Transfering bytes from input file to GZIP Format."); byte[] buf = new byte[1024]; int len; while((len = in.read(buf)) > 0) { out.write(buf, 0, len); } in.close(); System.out.println("Completing the GZIP file"); out.finish(); out.close(); } catch (IOException e) { e.printStackTrace(); System.exit(1); } } /** * Sole entry point to the class and application. * @param args Array of String arguments. */ public static void main(String[] args) { String str="E:\\AUTORUN.INF"; doCompressFile(str); } }
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import java.util.zip.GZIPInputStream;
import java.io.FileOutputStream;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;public class UncompressFileGZIP {
/**
* Uncompress the incoming file.
* @param inFileName Name of the file to be uncompressed
*/
private static void doUncompressFile(String inFileName) {try {
if (!getExtension(inFileName).equalsIgnoreCase("gz")) {
System.err.println("File name must have extension of \".gz\"");
System.exit(1);
}System.out.println("Opening the compressed file.");
GZIPInputStream in = null;
try {
in = new GZIPInputStream(new FileInputStream(inFileName));
} catch(FileNotFoundException e) {
System.err.println("File not found. " + inFileName);
System.exit(1);
}System.out.println("Open the output file.");
String outFileName = getFileName(inFileName);
FileOutputStream out = null;
try {
out = new FileOutputStream(outFileName);
} catch (FileNotFoundException e) {
System.err.println("Could not write to file. " + outFileName);
System.exit(1);
}System.out.println("Transfering bytes from compressed file to the output file.");
byte[] buf = new byte[1024];
int len;
while((len = in.read(buf)) > 0) {
out.write(buf, 0, len);
}System.out.println("Closing the file and stream");
in.close();
out.close();} catch (IOException e