package org.codehaus.plexus.compiler.csharp;
   
   import java.io.File;
   import java.io.IOException;
   import java.io.InputStream;
   import java.io.OutputStream;
   import java.nio.file.Files;
   import java.nio.file.Path;
   import java.util.Enumeration;
  import java.util.jar.JarEntry;
  import java.util.jar.JarFile;
  
  public class JarUtil {
      public static void extract(Path destDir, File jarFile) throws IOException {
          Path toPath = destDir.normalize();
          try (JarFile jar = new JarFile(jarFile)) {
              Enumeration<JarEntry> enumEntries = jar.entries();
              while (enumEntries.hasMoreElements()) {
                  JarEntry file = enumEntries.nextElement();
                  Path f = destDir.resolve(file.getName());
                  if (!f.startsWith(toPath)) {
                      throw new IOException("Bad zip entry");
                  }
                  if (file.isDirectory()) {
                      Files.createDirectories(f);
                      continue;
                  }
                  try (InputStream is = jar.getInputStream(file);
                          OutputStream fos = Files.newOutputStream(f)) {
                      while (is.available() > 0) {
                          fos.write(is.read());
                      }
                  }
              }
          }
      }
  }