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我想在Java中使用xz壓縮。使用xz 1.5壓縮庫,commons io 2.4庫和commons壓縮1.8.1庫。我試圖運行下面的代碼給我非常不一致的結果。文本超過70%,音頻和視頻文件低於0.1%(1-compressed/original * 100)。我在每次壓縮之前使用tarball。這應該只適用於文本文件?如何在Java中使用xz壓縮時獲得統一壓縮?
package makexz;
import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import org.apache.commons.compress.compressors.CompressorOutputStream;
import org.apache.commons.compress.compressors.CompressorStreamFactory;
import org.apache.commons.compress.compressors.xz.XZCompressorOutputStream;
import org.apache.commons.compress.utils.IOUtils;
public class MakeXZ {
public static void main(String[] args) throws FileNotFoundException, IOException, Exception {
FileOutputStream dest = new FileOutputStream("C://TARDUMP//XZ//newvid.tar.xz");
CompressorOutputStream cos = new CompressorStreamFactory().createCompressorOutputStream(CompressorStreamFactory.XZ, dest);
String input = "C://TARDUMP//newvid.tar";
IOUtils.copy(new FileInputStream(input), cos);
cos.close();
}
}