code: function addHash(path, file) {
    var rExt = file.rExt,
      qRExt = fis.util.escapeReg(rExt),
      qExt = fis.util.escapeReg(file.ext),
      hash = file.getHash(),
      onnector = fis.media().get('project.md5Connector', '_'),
      reg = new RegExp(qRExt + '$|' + qExt + '$', 'i');
    return path.replace(reg, '') + onnector + hash + rExt;
  }
docs: /*
  给文件添加md5标识符
  @param {String} path 文件路径
  @param {Object} file fis File对象
  @return {String} 带有md5 hash标识的路径