Can someone advice (give example) any appropriate and understandable way how to extract file or files with .7z extension basing upon InputStream. I have been examined the XZ for java api, but couldn't succeed. Waiting for any suggestion.
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问题:
回答1:
This code might help you.
import java.io.File; import java.io.FileNotFoundException; import java.io.FileOutputStream; import java.io.IOException; import java.io.RandomAccessFile; import java.util.Arrays; import net.sf.sevenzipjbinding.ExtractOperationResult; import net.sf.sevenzipjbinding.ISequentialOutStream; import net.sf.sevenzipjbinding.ISevenZipInArchive; import net.sf.sevenzipjbinding.SevenZip; import net.sf.sevenzipjbinding.SevenZipException; import net.sf.sevenzipjbinding.impl.RandomAccessFileInStream; import net.sf.sevenzipjbinding.simple.ISimpleInArchive; import net.sf.sevenzipjbinding.simple.ISimpleInArchiveItem; public class unzip { public static void main(String[] args) { RandomAccessFile randomAccessFile = null; ISevenZipInArchive inArchive = null; try { randomAccessFile = new RandomAccessFile("oclHashcat-plus-0.14.7z", "r"); inArchive = SevenZip.openInArchive(null, // autodetect archive type new RandomAccessFileInStream(randomAccessFile)); // Getting simple interface of the archive inArchive ISimpleInArchive simpleInArchive = inArchive.getSimpleInterface(); System.out.println(" Hash | Size | Filename"); System.out.println("----------+------------+---------"); for (final ISimpleInArchiveItem item : simpleInArchive.getArchiveItems()) { final int[] hash = new int[] { 0 }; if (!item.isFolder()) { ExtractOperationResult result; final long[] sizeArray = new long[1]; result = item.extractSlow(new ISequentialOutStream() { public int write(byte[] data) throws SevenZipException { //Write to file FileOutputStream fos; try { File file = new File(item.getPath()); file.getParentFile().mkdirs(); fos = new FileOutputStream(file); fos.write(data); fos.close(); } catch (FileNotFoundException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } hash[0] ^= Arrays.hashCode(data); // Consume data sizeArray[0] += data.length; return data.length; // Return amount of consumed data } }); if (result == ExtractOperationResult.OK) { System.out.println(String.format("%9X | %10s | %s", // hash[0], sizeArray[0], item.getPath())); } else { System.err.println("Error extracting item: " + result); } } } } catch (Exception e) { System.err.println("Error occurs: " + e); System.exit(1); } finally { if (inArchive != null) { try { inArchive.close(); } catch (SevenZipException e) { System.err.println("Error closing archive: " + e); } } if (randomAccessFile != null) { try { randomAccessFile.close(); } catch (IOException e) { System.err.println("Error closing file: " + e); } } } } }