feat(xispeak): 新增Excel校验接口，只校验不保存到数据库

- JeecgController 新增 checkExcelByEasyExcel 基类方法，batchHandler 传 null 跳过入库
- ExcelImportListener 支持 batchHandler 为 null 时不攒 batch 内存
- BgXiSpeakController 新增 /checkExcelByEasyExcel 接口

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

jeecg-boot-module/jeecg-module-tools/src/main/java/org/jeecg/common/util/excel/ExcelImportListener.java

@@ -47,7 +47,7 @@ public class ExcelImportListener<T> implements ReadListener<Map<Integer, String>
         this.displayToCode = displayToCode;
         this.batchHandler = batchHandler;
         this.errorHandler = errorHandler;
-        this.batch = new ArrayList<>(batchSize);
+        this.batch = batchHandler != null ? new ArrayList<>(batchSize) : null;
         this.errorBatch = new ArrayList<>(batchSize);
     }
 
@@ -133,12 +133,14 @@ public class ExcelImportListener<T> implements ReadListener<Map<Integer, String>
                 return;
             }
 
-            // 4. 成功加入批次
-            batch.add(obj);
+            // 4. 成功计数
             successCount[0]++;
-            if (batch.size() >= batchSize) {
-                batchHandler.accept(new ArrayList<>(batch));
-                batch.clear();
+            if (batchHandler != null) {
+                batch.add(obj);
+                if (batch.size() >= batchSize) {
+                    batchHandler.accept(new ArrayList<>(batch));
+                    batch.clear();
+                }
             }
 
         } catch (Exception e) {
@@ -158,7 +160,7 @@ public class ExcelImportListener<T> implements ReadListener<Map<Integer, String>
 
     @Override
     public void doAfterAllAnalysed(AnalysisContext context) {
-        if (!batch.isEmpty()) {
+        if (batchHandler != null && batch != null && !batch.isEmpty()) {
             batchHandler.accept(new ArrayList<>(batch));
             batch.clear();
         }