问7Zip未能解压缩Oracle 11g DB中JAVA源代码创建的文件

EN

CREATE OR REPLACE AND RESOLVE JAVA SOURCE NAMED "UTLZip" AS
import java.util.zip.*;
import java.io.*;
public class UTLZip
{
public static void compressFile(String infilename, String outfilename)
{
    String zipFile = "/home/oracle/DAR.zip";

        String[] srcFiles = {"/home/oracle/DAR.xls"};

        try {

            // create byte buffer
            byte[] buffer = new byte[1024];

            FileOutputStream fos = new FileOutputStream(zipFile);

            ZipOutputStream zos = new ZipOutputStream(fos);

            for (int i=0; i < srcFiles.length; i++) {

                File srcFile = new File(srcFiles[i]);

                FileInputStream fis = new FileInputStream(srcFile);


                zos.putNextEntry(new ZipEntry(srcFile.getName()));

                int length;

                while ((length = fis.read(buffer)) > 0) {
                    zos.write(buffer, 0, length);
                }

                zos.closeEntry();

                // close the InputStream
                fis.close();

            }

            // close the ZipOutputStream
            zos.close();

        }
        catch (IOException ioe) {
            System.out.println("Error creating zip file: " + ioe);
        }

    }

}