// 删除文件夹
 private static void deleteDirectory(File file) {
  if (file.isFile()) {// 表示该文件不是文件夹
   file.delete();
  } else {
   // 首先得到当前的路径
   String[] childFilePaths = file.list();
   for (String childFilePath : childFilePaths) {
    File childFile = new File(file.getAbsolutePath() + "/" + childFilePath);
    deleteDirectory(childFile);
   }
   file.delete();
  }
 }

public static void main(String[] args) {
  File del_file = new File("D:/Test/ibs" + "/temp/");
  deleteDirectory(del_file);
 }