code: public static Field convertToJavaBeansField(IntrospectedColumn introspectedColumn) {
          FullyQualifiedJavaType fqjt = introspectedColumn.getFullyQualifiedJavaType();
          String property = introspectedColumn.getJavaProperty();
          Field field = new Field();
          field.setVisibility(JavaVisibility.PRIVATE);
          field.setType(fqjt);
          field.setName(property);
          return field;
      }
docs: 列转换为字段
  
  @param introspectedColumn
  @return