code: public void registerMapper(String mapperClass) {
          try {
              registerMapper(Class.forName(mapperClass));
          } catch (ClassNotFoundException e) {
              throw new MapperException("注册通用Mapper[" + mapperClass + "]失败，找不到该通用Mapper!");
          }
      }
docs: 注册通用Mapper接口
  
  @param mapperClass