import java.io.File;

public class Test
{
   public static void main(String args[]){
       Test t = new Test();
       delFolder("c:/bb");
       System.out.println("deleted");
}

//刪除資料夾
//param folderPath 資料夾完整絕對路徑

     public static void delFolder(String folderPath) {
     try {
        delAllFile(folderPath); //刪除完裡面所有內容
        String filePath = folderPath;
        filePath = filePath.toString();
        java.io.File myFilePath = new java.io.File(filePath);
        myFilePath.delete(); //刪除空資料夾
     } catch (Exception e) {
       e.printStackTrace(); 
     }
}

//刪除指定資料夾下所有檔案
//param path 資料夾完整絕對路徑
   public static boolean delAllFile(String path) {
       boolean flag = false;
       File file = new File(path);
       if (!file.exists()) {
         return flag;
       }
       if (!file.isDirectory()) {
         return flag;
       }
       String[] tempList = file.list();
       File temp = null;
       for (int i = 0; i < tempList.length; i++) {
          if (path.endsWith(File.separator)) {
             temp = new File(path + tempList[i]);
          } else {
              temp = new File(path + File.separator + tempList[i]);
          }
          if (temp.isFile()) {
             temp.delete();
          }
          if (temp.isDirectory()) {
             delAllFile(path + "/" + tempList[i]);//先刪除資料夾裡面的檔案
             delFolder(path + "/" + tempList[i]);//再刪除空資料夾
             flag = true;
          }
       }
       return flag;
     }
}