java gzip压缩解压缩代码
发布时间:2020-12-15 00:16:11 所属栏目:Java 来源:网络整理
导读:今天PHP站长网 52php.cn把收集自互联网的代码分享给大家,仅供参考。 java Gzip压缩实现代码 import java.io.FileInputStream; import java.io.FileNotFoundException; import java.io.FileOutputStream; import java.io.
以下代码由PHP站长网 52php.cn收集自互联网 现在PHP站长网小编把它分享给大家,仅供参考 java Gzip压缩实现代码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,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,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 && 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 && 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"); } } 以上内容由PHP站长网【52php.cn】收集整理供大家参考研究 如果以上内容对您有帮助,欢迎收藏、点赞、推荐、分享。 (编辑:李大同) 【声明】本站内容均来自网络,其相关言论仅代表作者个人观点,不代表本站立场。若无意侵犯到您的权利,请及时与联系站长删除相关内容! |