docs: public void setConfig(Config config) {
          this.config = config;
          if(config.getResolveClass() != null){
              try {
                  EntityHelper.setResolve(config.getResolveClass().newInstance());
              } catch (Exception e) {
                  throw new MapperException("创建 " + config.getResolveClass().getCanonicalName()
                          + " 实例失败，请保证该类有默认的构造方法!", e);
              }
          }
          if(config.getMappers() != null && config.getMappers().size() > 0){
              for (Class mapperClass : config.getMappers()) {
                  registerMapper(mapperClass);
              }
          }
      }