java gzip压缩解压缩代码，javagzip压缩解压缩,java Gzip压缩实

java gzip压缩解压缩代码，javagzip压缩解压缩,java Gzip压缩实

java Gzip压缩实现代码 ```javaimport 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);}

} java Gzip解压缩代码javaimport 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) {         e.printStackTrace();         System.exit(1);     }}/**  * Used to extract and return the extension of a given file.  * @param f Incoming file to get the extension of  * @return <code>String</code> representing the extension of the incoming  *         file.  */ public static String getExtension(String f) {     String ext = "";     int i = f.lastIndexOf('.');    if (i > 0 &amp;&amp;  i < f.length() - 1) {         ext = f.substring(i+1);     }          return ext; }/**  * Used to extract the filename without its extension.  * @param f Incoming file to get the filename  * @return <code>String</code> representing the filename without its  *         extension.  */ public static String getFileName(String f) {     String fname = "";     int i = f.lastIndexOf('.');    if (i > 0 &amp;&amp;  i < f.length() - 1) {         fname = f.substring(0,i);     }          return fname; }/**  * Sole entry point to the class and application.  * @param args Array of String arguments.  */ public static void main(String[] args) {        doUncompressFile("E:\\AUTORUN.INF.gz");}

}```