Commons-compress operation zip file (compression and decompression)

Commons-compress: For more information about zip files (compression and decompression), see.

Apache Commons Compress is a class library for compressing and decompressing files.

You can operate files in ar, cpio, Unix dump, tar, zip, gzip, XZ, Pack200 and bzip2 formats with powerful functions.

Here, we will write two methods to Compress files into zip files and decompress files from zip files using Commons Compress.

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Package cn. luxh. utils; Import java. io. File; Import java. io. FileInputStream; Import java. io. FileOutputStream; Import java. io. IOException; Import java. io. InputStream; Import java. io. OutputStream;   Import org. apache. commons. compress. archivers. ArchiveEntry; Import org.apache.commons.compress.archivers.zip. Zip64Mode; Import org.apache.commons.compress.archivers.zip. ZipArchiveEntry; Import org.apache.commons.compress.archivers.zip. ZipArchiveInputStream; Import org.apache.commons.compress.archivers.zip. ZipArchiveOutputStream;     /** * Zip file tool * @ Author Luxh */ Public class ZipFileUtil {   /** * Compressing a file into zip format * @ Param files the file to be compressed * @ Param zipFilePath: zip file path after compression, for example, "D:/test/aa.zip "; */ Public static void compressFiles2Zip (File [] files, String zipFilePath ){ If (files! = Null & files. length> 0 ){ If (isEndsWithZip (zipFilePath )){ ZipArchiveOutputStream zaos = null; Try { File zipFile = new File (zipFilePath ); Zaos = new ZipArchiveOutputStream (zipFile ); // Use Zip64 extensions for all entries where they are required Zaos. setUseZip64 (Zip64Mode. AsNeeded );   // Encapsulate each file using ZipArchiveEntry // Use ZipArchiveOutputStream to write to the compressed file For (File file: files ){ If (file! = Null ){ ZipArchiveEntry zipArchiveEntry = new ZipArchiveEntry (file, file. getName ()); Zaos. putArchiveEntry (zipArchiveEntry ); InputStream is = null; Try { Is = new FileInputStream (file ); Byte [] buffer = new byte [1, 1024*5]; Int len =-1; While (len = is. read (buffer ))! =-1 ){ // Write the buffer byte to ZipArchiveEntry Zaos. write (buffer, 0, len ); } // Writes all necessary data for this entry. Zaos. closeArchiveEntry (); } Catch (Exception e ){ Throw new RuntimeException (e ); } Finally { If (is! = Null) Is. close (); }   } } Zaos. finish (); } Catch (Exception e ){ Throw new RuntimeException (e ); } Finally { Try { If (zaos! = Null ){ Zaos. close (); } } Catch (IOException e ){ Throw new RuntimeException (e ); } }   }   }   }   /** * Decompress the zip file to the specified folder. * @ Param zipFilePath: zip file path, for example, "D:/test/aa.zip" * @ Param saveFileDir: the path of the extracted file, for example, "D:/test /" */ Public static void decompressZip (String zipFilePath, String saveFileDir ){ If (isEndsWithZip (zipFilePath )){ File file = new File (zipFilePath ); If (file. exists ()){ InputStream is = null; // Can read Zip archives ZipArchiveInputStream zais = null; Try { Is = new FileInputStream (file ); Zais = new ZipArchiveInputStream (is ); ArchiveEntry archiveEntry = null; // Read each file in the zip package // Then write the file to the specified folder While (archiveEntry = zais. getNextEntry ())! = Null ){ // Get the file name String entryFileName = archiveEntry. getName (); // Construct the decompressed file storage path String entryFilePath = saveFileDir + entryFileName; Byte [] content = new byte [(int) archiveEntry. getSize ()]; Zais. read (content ); OutputStream OS = null; Try { // Write the extracted file to the specified path File entryFile = new File (entryFilePath ); OS = new FileOutputStream (entryFile ); OS. write (content ); } Catch (IOException e ){ Throw new IOException (e ); } Finally { If (OS! = Null ){ OS. flush (); OS. close (); } }   } } Catch (Exception e ){ Throw new RuntimeException (e ); } Finally { Try { If (zais! = Null ){ Zais. close (); } If (is! = Null ){ Is. close (); } } Catch (IOException e ){ Throw new RuntimeException (e ); } } } } }   /** * The. Zip file name is used as the suffix. * @ Param fileName the file name to be determined * @ Return: return true for a zip file; otherwise, return false. */ Public static boolean isEndsWithZip (String fileName ){ Boolean flag = false; If (fileName! = Null &&! "". Equals (fileName. trim ())){ If (fileName. endsWith (". ZIP") | fileName. endsWith (". zip ")){ Flag = true; } } Return flag; }   }         Package cn. luxh. test;   Import java. io. File;   Import org. junit. Test;   Import cn. luxh. utils. ZipFileUtil;   /** * Test ZipFileUtil compression and decompression methods. * @ Author Luxh */ Public class ZipFileUtilTest {   @ Test Public void testCompressFiles2Zip (){ // Directory for storing the files to be compressed File srcFile = new File ("D:/test "); // Zip file path after compression String zipFilePath = "d:/test2/test.zip "; If (srcFile. exists ()){ File [] files = srcFile. listFiles (); ZipFileUtil. compressFiles2Zip (files, zipFilePath ); } }   @ Test Public void testDecompressZip (){ // Path of the compressed package String zipFilePath = "d:/test2/test.zip "; // The directory where the extracted files are stored String saveFileDir = "d:/test2 /"; // Call the decompression method ZipFileUtil. decompressZip (zipFilePath, saveFileDir ); } }