关于文件的压缩ZipOutputStream：报错

        if (filesFile.isDirectory()) {  
            zipOutputStream.putNextEntry(new ZipEntry(filesFile.getName() + "/"));  
            File[] files = filesFile.listFiles();  
            for (File file : files) {  
                compressionFolder(file, zipOutputStream);  
            }  
        } 
######我试了一下，不行。我想在这个函数中做递归。######public class Compression {


  // 要压缩文件的路径
  private String srcPath;


  // 压缩后存放的路径
  private String dirPath;


  public Compression(String srcPath, String dirPath) {
    this.srcPath = srcPath;
    this.dirPath = dirPath;
  }


  /**
   * 压缩程序
   /
  public void compressionProgram() {
    ZipOutputStream zipOutputStream = null;
    File file = null;


    try {
      file = new File(srcPath);
      zipOutputStream = new ZipOutputStream(new FileOutputStream(dirPath));


      if(file.isDirectory()) {//文件夹
        compressionFolder(file, zipOutputStream, "");
      } else {//文件
        zipOutputStream.putNextEntry(new ZipEntry(""));
        compressionFile(file, zipOutputStream, "");
      }


    } catch (FileNotFoundException  e) {
      e.printStackTrace();
    } catch (IOException e) {
      e.printStackTrace();
    } finally {
      try {
        if(zipOutputStream != null) {
         zipOutputStream.close();
        }
      } catch (IOException e) {
        e.printStackTrace();
      }
    } // try
 }


  /**
     压缩文件
   *  参数： 当前访问的文件file，  压缩流zipCompression
   /
  private void compressionFile(File file, ZipOutputStream zipOutputStream, String dir) {
    FileInputStream fileInputStream = null;
    try {


      zipOutputStream.putNextEntry(new ZipEntry(dir + file.getName()));


      fileInputStream = new FileInputStream(file);
      byte[] byteStr = new byte[1024 * 1024]; // 每次读取1M
      int strLength = -1;


      while((strLength = fileInputStream.read(byteStr) ) > 0) {
        zipOutputStream.write(byteStr, 0, strLength);
      }


    } catch (FileNotFoundException e) {
      new Throwable("文件不存在！");
    } catch (IOException e) {
      e.printStackTrace();
    } finally {
      try {
        if(fileInputStream != null) {
          fileInputStream.close();
        }
      } catch (IOException e) {
        e.printStackTrace();
      }
    } // try
 }


  /**
     压缩文件夹
   */
  private void compressionFolder(File file, ZipOutputStream zipOutputStream, String dir) throws FileNotFoundException {
    String path = dir + file.getName() + "/";
    try {
      zipOutputStream.putNextEntry(new ZipEntry(path));


      File[] files = file.listFiles(); //得到该文件夹下的所有文件
      for (File filesFile : files) {


        if(filesFile.isDirectory()) {
          compressionFolder(filesFile, zipOutputStream, path);
        } else {
          compressionFile(filesFile, zipOutputStream, path);
        }


      } // for


    } catch (IOException e) {
       e.printStackTrace();
    }
  }
}