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How to get bytes / contents of each ZipFile entry from a ZipInputStream without writing to the output stream?

I am trying to get bytes of a specific file from an input stream with an archived file. I have Zipped file input stream data. From this I get ZipEntry and write the contents of each ZipEntry to the output stream and returning a byte buffer. This will return a buffer size output stream, but not the contents of each specific file. Is there any way I can convert a FileOutputStream to bytes or directly read the bytes of each ZipEntry?

I need to return the contents of ZipEntry as output. I do not want to write to the file, but just get the contents of each zip entry.

Thank you for your help.

public final class ArchiveUtils {

private static String TEMP_DIR = "/tmp/unzip/";

public static byte[] unZipFromByteStream(byte[] data, String fileName) {

    ZipEntry entry = null;
    ZipInputStream zis = new ZipInputStream(new ByteArrayInputStream(data));
    File tempDirectory = ensureTempDirectoryExists(TEMP_DIR);
    try {
        while ((entry = zis.getNextEntry()) != null) {

            if (!entry.isDirectory()) {
                System.out.println("-" + entry.getName());

                File file = new File(tempDirectory + "/"+ entry.getName());

                if (!new File(file.getParent()).exists())
                    new File(file.getParent()).mkdirs();
                OutputStream out = new FileOutputStream(entry.getName());
                byte[] byteBuff = new byte[1024];
                int bytesRead = 0;
                while ((bytesRead = zis.read(byteBuff)) != -1)
                {
                    out.write(byteBuff, 0, bytesRead);
                }
                out.close();
                if(entry.getName().equals(fileName)){
                return byteBuff;
                }
            }
        }
    } catch (Exception ex) {
        ex.printStackTrace();
    }
    return null;
}

private static File ensureTempDirectoryExists(String outputPath) {

    File outputDirectory = new File(outputPath);
    if (!outputDirectory.exists()) {
        outputDirectory.mkdir();
    }
    return outputDirectory;
}

}

+4
2

java.io.ByteArrayOutputStream -

ByteArrayOutputStream out = null; // outside of your loop (for scope).

// where you have a FileOutputStream.
out = new ByteArrayOutputStream(); // doesn't use entry.getName(). 


return (out == null) ? null : out.toByteArray();
+3

ZIP , ZipInputStream, , getNextEntry, - , .

+1

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