我知道这是一项容易的任务，但是更改代码后它停止工作，并且无法恢复！我实际上使用了两个函数来进行压缩和解压缩，尽管实际上它是“ jar”和“
unjar”，但这并没有太大的区别

   public static void zipit(File[] infiles, JarOutputStream jos) throws Exception
   {
      zipit(infiles,"", jos);
   }

   public static void zipit(File[] infiles, String root, JarOutputStream jos) throws Exception
   {

      byte[] buffer = new byte[4096];

      for(int i=0; i<infiles.length; i++)
      {
         // recursive call for subfolders... temporary
         if(infiles[i].isDirectory())
         {
            zipit(infiles[i].listFiles(), infiles[i].getName() + "/", jos);
            continue;
         }

         // create string with absolute path
         String entryfile = root + infiles[i].getName();

         JarEntry entry = new JarEntry(entryfile);
         zos.putNextEntry(entry);

         FileInputStream fis = new FileInputStream(infiles[i]);

         int count;
         while((count = fis.read(buffer, 0, buffer.length)) != -1)
            zos.write(buffer, 0, count);
      }
   }

   public static void unzipit(File zipfile, File outputfolder) throws Exception
   {
      JarFile jar = new JarFile(zipfile);

      for(Enumeration entries = jar.entries(); entries.hasMoreElements(); )
      {
         JarEntry entry = (JarEntry) entries.nextElement();
         File unzipped = new File(outputfolder, entry.getName());
         if (entry.isDirectory() && !unzipped.exists())
         {
            unzipped.mkdirs();
            continue;
         }
         else if (!unzipped.getParentFile().exists())
            unzipped.getParentFile().mkdirs();

         FileOutputStream fos = new FileOutputStream(unzipped);
         InputStream in = jar.getInputStream(entry);

         byte[] buffer = new byte[4096];
         int count;
         while((count = in.read(buffer, 0, buffer.length)) != -1)
            fos.write(buffer, 0, count);
         fos.close();
      }
   }

任何帮助/建议吗？

创建JarFile时发生错误：

java.util.zip.ZipException: error in opening zip file
    at java.util.zip.ZipFile.open(Native Method)
    at java.util.zip.ZipFile.<init>(ZipFile.java:131)
    at java.util.jar.JarFile.<init>(JarFile.java:150)
    at java.util.jar.JarFile.<init>(JarFile.java:114)