新增注释

ktg-framework/src/main/java/com/ktg/framework/config/WebMvcConfig.java

@@ -24,6 +24,7 @@ public class WebMvcConfig implements WebMvcConfigurer {
         converters.add(new StringHttpMessageConverter());
 
         Jackson2ObjectMapperBuilder builder = new Jackson2ObjectMapperBuilder();
+        // 忽略序列化时null字段的显示
         builder.serializationInclusion(JsonInclude.Include.NON_NULL);
         ObjectMapper objectMapper = builder.build();