/// 将日志信息写入文件
        /// </summary>
        /// <param name="logText">日志信息</param>
        public void logWirte(string logText)
        {
            string threadID = Thread.CurrentThread.ManagedThreadId.ToString();
            cacheLock.EnterWriteLock();
            try
            {       
                //判断日志文件的存在
                FileStream fs = new FileStream(path, FileMode.OpenOrCreate, FileAccess.Read);
                fs.Close();
                fs.Dispose();
                StreamWriter sw = new StreamWriter(path, true);
                sw.WriteLine(DateTime.Now.ToString("hh:mm:ss") + "：线程" + threadID + "-->" + logText);
                sw.Close();
                sw.Dispose();                
            }
            finally
            {
                cacheLock.ExitWriteLock();
            }
         }