code: public static BeanMapping create(Class srcClass, Class targetClass) {
          BeanMappingObject config = BeanMappingConfigHelper.getInstance().getBeanMappingObject(srcClass, targetClass);
          if (config == null) {
              throw new BeanMappingException("can not found mapping config for srcClass[" + srcClass.toString()
                                             + "] targetClass[" + targetClass + "]");
          }
  
          return new BeanMapping(config);
      }
docs: 创建srcClass和targetClass之间的BeanMapping操作