init local code

src/main/java/com/yunhai/cms/config/JacksonConfig.java

@@ -0,0 +1,28 @@
+package com.yunhai.cms.config;
+
+import org.springframework.boot.autoconfigure.jackson.Jackson2ObjectMapperBuilderCustomizer;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+
+import com.fasterxml.jackson.datatype.jsr310.deser.LocalDateTimeDeserializer;
+import com.fasterxml.jackson.datatype.jsr310.ser.LocalDateTimeSerializer;
+
+import java.time.format.DateTimeFormatter;
+
+/**
+ * LocalDateTime 统一按 yyyy-MM-dd HH:mm:ss 序列化/反序列化
+ * （yml 的 spring.jackson.date-format 不作用于 JSR310，需显式定制；UserHome JacksonConfig 同意图）。
+ */
+@Configuration
+public class JacksonConfig {
+
+    private static final DateTimeFormatter DATE_TIME =
+            DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss");
+
+    @Bean
+    public Jackson2ObjectMapperBuilderCustomizer localDateTimeCustomizer() {
+        return builder -> builder
+                .serializers(new LocalDateTimeSerializer(DATE_TIME))
+                .deserializers(new LocalDateTimeDeserializer(DATE_TIME));
+    }
+}