修复 Spring Cloud 单元测试，插入数据不返回 id 的问题

yudao-framework/yudao-common/src/main/java/cn/iocoder/yudao/framework/common/util/json/JsonUtils.java

@@ -7,6 +7,7 @@ import com.fasterxml.jackson.core.type.TypeReference;
 import com.fasterxml.jackson.databind.JsonNode;
 import com.fasterxml.jackson.databind.ObjectMapper;
 import com.fasterxml.jackson.databind.SerializationFeature;
+import com.fasterxml.jackson.datatype.jsr310.JavaTimeModule;
 import lombok.SneakyThrows;
 import lombok.experimental.UtilityClass;
 import lombok.extern.slf4j.Slf4j;
@@ -28,6 +29,7 @@ public class JsonUtils {
 
     static {
         objectMapper.configure(SerializationFeature.FAIL_ON_EMPTY_BEANS, false);
+        objectMapper.registerModules(new JavaTimeModule()); // 解决 LocalDateTime 的序列化
     }
 
     /**