import org.apache.commons.compress.archivers.sevenz.SevenZFile; //导入依赖的package包/类
public static void decompress(File outputDirectory, File file, boolean outerworld, String type) {
    try {
        SevenZFile archive = new SevenZFile(file);
        SevenZArchiveEntry entry;
        while ((entry = archive.getNextEntry()) != null) {
            String filename = Paths.get(entry.getName()).getFileName().toString();

            if (tablesNeeded(outerworld, type).stream().anyMatch(filename::contains)) {
                log.info("Extracting {}", filename);
                byte[] content = new byte[(int) entry.getSize()];
                archive.read(content, 0, content.length);
                File outputFile = new File(outputDirectory, filename.replace(".gz", ""));
                try (GZIPInputStream input = new GZIPInputStream(new ByteArrayInputStream(content)); FileOutputStream output = new FileOutputStream(outputFile)) {
                    IOUtils.copy(input, output);
                }
            }
        }
        archive.close();
    }
    catch (IOException e) {
    throw propagate(e);
}
}
 

import org.apache.commons.compress.archivers.sevenz.SevenZFile; //导入依赖的package包/类
@Override
public void parse(File file) throws IOException {
    mEntries = new ArrayList<>();
    SevenZFile sevenZFile = new SevenZFile(file);

    SevenZArchiveEntry entry = sevenZFile.getNextEntry();
    while (entry != null) {
        if (entry.isDirectory()) {
            continue;
        }
        if (Utils.isImage(entry.getName())) {
            byte[] content = new byte[(int)entry.getSize()];
            sevenZFile.read(content);
            mEntries.add(new SevenZEntry(entry, content));
        }
        entry = sevenZFile.getNextEntry();
    }

    Collections.sort(mEntries, new NaturalOrderComparator() {
        @Override
        public String stringValue(Object o) {
            return ((SevenZEntry) o).entry.getName();
        }
    });
}
 

import org.apache.commons.compress.archivers.sevenz.SevenZFile; //导入依赖的package包/类
/**
 * Read from compressed file
 * 
 * @param srcPath
 *            path of compressed file
 * @param fileCompressor
 *            FileCompressor object
 * @throws Exception
 */
@Override
public void read(String srcPath, FileCompressor fileCompressor)
        throws Exception {
    long t1 = System.currentTimeMillis();
    byte[] data = FileUtil.convertFileToByte(srcPath);
    ByteArrayOutputStream baos = new ByteArrayOutputStream();
    SevenZFile sevenZFile = new SevenZFile(new File(srcPath));
    try {
        byte[] buffer = new byte[1024];
        int readByte;
        SevenZArchiveEntry entry = sevenZFile.getNextEntry();
        while (entry != null && entry.getSize() > 0) {
            long t2 = System.currentTimeMillis();
            baos = new ByteArrayOutputStream();
            readByte = sevenZFile.read(buffer);
            while (readByte != -1) {
                baos.write(buffer, 0, readByte);
                readByte = sevenZFile.read(buffer);
            }
            BinaryFile binaryFile = new BinaryFile(entry.getName(),
                    baos.toByteArray());
            fileCompressor.addBinaryFile(binaryFile);
            LogUtil.createAddFileLog(fileCompressor, binaryFile, t2,
                    System.currentTimeMillis());
            entry = sevenZFile.getNextEntry();
        }
    } catch (Exception e) {
        FileCompressor.LOGGER.error("Error on get compressor file", e);
    } finally {
        sevenZFile.close();
        baos.close();
    }
    LogUtil.createReadLog(fileCompressor, srcPath, data.length, t1,
            System.currentTimeMillis());
}
 

import org.apache.commons.compress.archivers.sevenz.SevenZFile; //导入依赖的package包/类
@Override
protected ArchiveInputStream createArchiveInputStream(File archive) throws IOException {
    return new SevenZInputStream(new SevenZFile(archive));
}
 

import org.apache.commons.compress.archivers.sevenz.SevenZFile; //导入依赖的package包/类
public SevenZInputStream(SevenZFile file) {
    this.file = file;
}