diff --git a/src/main/java/com/yunhai/userbase/config/JacksonConfig.java b/src/main/java/com/yunhai/userbase/config/JacksonConfig.java
new file mode 100644
index 0000000..7f6d788
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+++ b/src/main/java/com/yunhai/userbase/config/JacksonConfig.java
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+package com.yunhai.userbase.config;
+
+import com.fasterxml.jackson.datatype.jsr310.deser.LocalDateDeserializer;
+import com.fasterxml.jackson.datatype.jsr310.deser.LocalDateTimeDeserializer;
+import com.fasterxml.jackson.datatype.jsr310.ser.LocalDateSerializer;
+import com.fasterxml.jackson.datatype.jsr310.ser.LocalDateTimeSerializer;
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.boot.autoconfigure.jackson.Jackson2ObjectMapperBuilderCustomizer;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.http.converter.json.Jackson2ObjectMapperBuilder;
+
+import java.time.LocalDate;
+import java.time.LocalDateTime;
+import java.time.format.DateTimeFormatter;
+
+/**
+ * 全局 Jackson 日期格式统一。
+ *
+ * <p>Spring Boot 的 {@code spring.jackson.date-format} 只作用于 {@link java.util.Date}，
+ * 对 {@code LocalDateTime}/{@code LocalDate} 无效；且 {@code spring.jackson.local-date-time-format}
+ * 并非 {@code JacksonProperties} 的合法绑定项（会被静默忽略）。本配置把 Nacos 中已配置的
+ * {@code spring.jackson.date-format} 同时应用到 JSR-310 时间类型，做到全局统一。
+ *
+ * <p>仅用 {@code serializerByType}/{@code deserializerByType} 覆盖 JavaTimeModule 默认序列化器，
+ * 不 new 整个 ObjectMapper，因此不会禁用 Spring Boot 的 Jackson 自动配置；
+ * 字段上的 {@code @JsonFormat} 优先级更高，不受影响。
+ */
+@Configuration
+public class JacksonConfig {
+
+    @Bean
+    public Jackson2ObjectMapperBuilderCustomizer jackson2ObjectMapperBuilderCustomizer(
+            @Value("${spring.jackson.date-format:yyyy-MM-dd HH:mm:ss}") String dateFormat) {
+        DateTimeFormatter dateTimeFormatter = DateTimeFormatter.ofPattern(dateFormat);
+        DateTimeFormatter dateFormatter = DateTimeFormatter.ofPattern("yyyy-MM-dd");
+        return (Jackson2ObjectMapperBuilder builder) -> {
+            builder.serializerByType(LocalDateTime.class, new LocalDateTimeSerializer(dateTimeFormatter));
+            builder.deserializerByType(LocalDateTime.class, new LocalDateTimeDeserializer(dateTimeFormatter));
+            builder.serializerByType(LocalDate.class, new LocalDateSerializer(dateFormatter));
+            builder.deserializerByType(LocalDate.class, new LocalDateDeserializer(dateFormatter));
+        };
+    }
+}