java ftp上传删除文件

public void deleteFtpFiles(FTPClient client,String fileName,String fromPath) throws IOException{
  client.changeWorkingDirectory(fromPath);//切换到要删除的目录
  String[] str = client.listNames();//得到目录下的所有文文件
  for(String s :str){
   if(s.contains(fileName)){
    boolean flag = client.deleteFile(s);
    
   }
  }
  
 }