fix(feign): Feign 默认的解码器未使用全局 HttpMessageConverters，导致LocalDateTime 不能从毫秒时间戳反序列化。改为 SpringDecoder + ResponseEntityDecoder，复用容器里的 ObjectMapper。

yudao-framework/yudao-spring-boot-starter-web/src/main/java/cn/iocoder/yudao/framework/jackson/config/YudaoJacksonAutoConfiguration.java

@@ -1,10 +1,10 @@
 package cn.iocoder.yudao.framework.jackson.config;
 
-import cn.hutool.core.collection.CollUtil;
 import cn.iocoder.yudao.framework.common.util.json.JsonUtils;
 import cn.iocoder.yudao.framework.common.util.json.databind.NumberSerializer;
 import cn.iocoder.yudao.framework.common.util.json.databind.TimestampLocalDateTimeDeserializer;
 import cn.iocoder.yudao.framework.common.util.json.databind.TimestampLocalDateTimeSerializer;
+import com.fasterxml.jackson.databind.Module;
 import com.fasterxml.jackson.databind.ObjectMapper;
 import com.fasterxml.jackson.databind.module.SimpleModule;
 import com.fasterxml.jackson.datatype.jsr310.deser.LocalDateDeserializer;
@@ -13,40 +13,65 @@ import com.fasterxml.jackson.datatype.jsr310.ser.LocalDateSerializer;
 import com.fasterxml.jackson.datatype.jsr310.ser.LocalTimeSerializer;
 import lombok.extern.slf4j.Slf4j;
 import org.springframework.boot.autoconfigure.AutoConfiguration;
+import org.springframework.boot.autoconfigure.jackson.Jackson2ObjectMapperBuilderCustomizer;
 import org.springframework.context.annotation.Bean;
 
 import java.time.LocalDate;
 import java.time.LocalDateTime;
 import java.time.LocalTime;
-import java.util.List;
 
 @AutoConfiguration
 @Slf4j
 public class YudaoJacksonAutoConfiguration {
 
+    /**
+     * 初始化全局 JsonUtils，直接使用主 ObjectMapper
+     */
     @Bean
     @SuppressWarnings("InstantiationOfUtilityClass")
-    public JsonUtils jsonUtils(List<ObjectMapper> objectMappers) {
+    public JsonUtils jsonUtils(ObjectMapper objectMapper) {
-        // 1.1 创建 SimpleModule 对象
+        JsonUtils.init(objectMapper);
-        SimpleModule simpleModule = new SimpleModule();
-        simpleModule
-                // 新增 Long 类型序列化规则，数值超过 2^53-1，在 JS 会出现精度丢失问题，因此 Long 自动序列化为字符串类型
-                .addSerializer(Long.class, NumberSerializer.INSTANCE)
-                .addSerializer(Long.TYPE, NumberSerializer.INSTANCE)
-                .addSerializer(LocalDate.class, LocalDateSerializer.INSTANCE)
-                .addDeserializer(LocalDate.class, LocalDateDeserializer.INSTANCE)
-                .addSerializer(LocalTime.class, LocalTimeSerializer.INSTANCE)
-                .addDeserializer(LocalTime.class, LocalTimeDeserializer.INSTANCE)
-                // 新增 LocalDateTime 序列化、反序列化规则，使用 Long 时间戳
-                .addSerializer(LocalDateTime.class, TimestampLocalDateTimeSerializer.INSTANCE)
-                .addDeserializer(LocalDateTime.class, TimestampLocalDateTimeDeserializer.INSTANCE);
-        // 1.2 注册到 objectMapper
-        objectMappers.forEach(objectMapper -> objectMapper.registerModule(simpleModule));
-
-        // 2. 设置 objectMapper 到 JsonUtils
-        JsonUtils.init(CollUtil.getFirst(objectMappers));
         log.info("[init][初始化 JsonUtils 成功]");
         return new JsonUtils();
     }
 
+    /**
+     * 从 Builder 源头定制（关键：使用 *ByType，避免 handledType 要求）
+     */
+    @Bean
+    public Jackson2ObjectMapperBuilderCustomizer ldtEpochMillisCustomizer() {
+        return builder -> builder
+                // Long -> String
+                .serializerByType(Long.class, NumberSerializer.INSTANCE)
+                .serializerByType(Long.TYPE, NumberSerializer.INSTANCE)
+                // LocalDate / LocalTime
+                .serializerByType(LocalDate.class, LocalDateSerializer.INSTANCE)
+                .deserializerByType(LocalDate.class, LocalDateDeserializer.INSTANCE)
+                .serializerByType(LocalTime.class, LocalTimeSerializer.INSTANCE)
+                .deserializerByType(LocalTime.class, LocalTimeDeserializer.INSTANCE)
+                // LocalDateTime < - > EpochMillis
+                .serializerByType(LocalDateTime.class, TimestampLocalDateTimeSerializer.INSTANCE)
+                .deserializerByType(LocalDateTime.class, TimestampLocalDateTimeDeserializer.INSTANCE);
+    }
+
+    /**
+     * 以 Bean 形式暴露 Module（Boot 会自动注册到所有 ObjectMapper）
+     */
+    @Bean
+    public Module timestampSupportModuleBean() {
+        SimpleModule m = new SimpleModule("TimestampSupportModule");
+        // Long -> String，避免前端精度丢失
+        m.addSerializer(Long.class, NumberSerializer.INSTANCE);
+        m.addSerializer(Long.TYPE, NumberSerializer.INSTANCE);
+        // LocalDate / LocalTime
+        m.addSerializer(LocalDate.class, LocalDateSerializer.INSTANCE);
+        m.addDeserializer(LocalDate.class, LocalDateDeserializer.INSTANCE);
+        m.addSerializer(LocalTime.class, LocalTimeSerializer.INSTANCE);
+        m.addDeserializer(LocalTime.class, LocalTimeDeserializer.INSTANCE);
+        // LocalDateTime < - > EpochMillis
+        m.addSerializer(LocalDateTime.class, TimestampLocalDateTimeSerializer.INSTANCE);
+        m.addDeserializer(LocalDateTime.class, TimestampLocalDateTimeDeserializer.INSTANCE);
+        return m;
+    }
+
 }