Java 删除文件夹和子文件夹中的所有文件

 public boolean deletefile(String path){
  boolean flag = false;
  File file = new File(path);
  if (!file.exists()) {
   return false;
  }
  if (!file.isDirectory()) {
   return false;
  }
  String[] str = file.list();
  for (int i = 0; i < str.length; i++) {
   System.out.println("333:"+str[i]);
   File fi = new File(path + "/" + str[i]);
   if (path.endsWith(file.separator)) {
    fi = new File(path + str[i]);
   } else {
    fi = new File(path + fi.separator + str[i]);
   }
  
   if(fi.exists()||fi.list().length==0){
    File myFilePath = new File(path+"/"+str[i]);   
    myFilePath.delete();
    }
   if(fi.isDirectory())//如果文件假内还有 就继续调用本方法       
    {          
    deletefile(path+"/"+str[i]);      
    }else{
     fi.delete();
       }

  }
  return true;
 }