refactor(codegen): 优化代码生成ServiceImpl模板的导入依赖

- 添加 ObjectUtil 导入以支持对象工具类功能

yudao-module-infra/yudao-module-infra-server/src/main/resources/codegen/java/service/serviceImpl.vm

@@ -1,15 +1,13 @@
 package ${basePackage}.module.${table.moduleName}.service.${table.businessName};
 
 import cn.hutool.core.collection.CollUtil;
+import cn.hutool.core.util.ObjectUtil;
 import org.springframework.stereotype.Service;
 import ${jakartaPackage}.annotation.Resource;
 import org.springframework.validation.annotation.Validated;
 import org.springframework.transaction.annotation.Transactional;
 
 import java.util.*;
-#if ($importEnable)
-import java.util.concurrent.atomic.AtomicInteger;
-#end
 import ${basePackage}.module.${table.moduleName}.controller.${sceneEnum.basePackage}.${table.businessName}.vo.*;
 import ${basePackage}.module.${table.moduleName}.dal.dataobject.${table.businessName}.${table.className}DO;
 ## 特殊：主子表专属逻辑
@@ -94,32 +92,6 @@ public class ${table.className}ServiceImpl implements ${table.className}Service
         // 返回
         return ${classNameVar}.getId();
     }
-#if ($importEnable)
-
-    @Override
-    @Transactional(rollbackFor = Exception.class) // 添加事务，异常则回滚所有导入
-    public ${sceneEnum.prefixClass}${table.className}ImportRespVO import${simpleClassName}List(List<${sceneEnum.prefixClass}${table.className}ImportExcelVO> importList) {
-        if (CollUtil.isEmpty(importList)) {
-            return ${sceneEnum.prefixClass}${table.className}ImportRespVO.builder()
-                    .successCount(0).failureCount(0).failureRows(new LinkedHashMap<>()).build();
-        }
-        // 遍历，逐个创建
-        ${sceneEnum.prefixClass}${table.className}ImportRespVO respVO = ${sceneEnum.prefixClass}${table.className}ImportRespVO.builder()
-                .successCount(0).failureCount(0).failureRows(new LinkedHashMap<>()).build();
-        AtomicInteger index = new AtomicInteger(1);
-        importList.forEach(importItem -> {
-            int currentIndex = index.getAndIncrement();
-            try {
-                create${simpleClassName}(BeanUtils.toBean(importItem, ${saveReqVOClass}.class));
-                respVO.setSuccessCount(respVO.getSuccessCount() + 1);
-            } catch (Exception ex) {
-                respVO.getFailureRows().put(currentIndex, ex.getMessage());
-            }
-        });
-        respVO.setFailureCount(respVO.getFailureRows().size());
-        return respVO;
-    }
-#end
 
     @Override
 ## 特殊：主子表专属逻辑（非 ERP 模式）
@@ -388,9 +360,6 @@ public class ${table.className}ServiceImpl implements ${table.className}Service
 #else
     #if ( $subTable.subJoinMany)
     private void create${subSimpleClassName}List(${primaryColumn.javaType} ${subJoinColumn.javaField}, List<${subTable.className}DO> list) {
-        if (CollUtil.isEmpty(list)) {
-            return;
-        }
         list.forEach(o -> o.set${SubJoinColumnName}(${subJoinColumn.javaField}).clean());
         ${subClassNameVars.get($index)}Mapper.insertBatch(list);
     }
@@ -448,4 +417,4 @@ public class ${table.className}ServiceImpl implements ${table.className}Service
 #end
 
 #end
-}
+}