修复空模板会空一行的bug

src/main/java/com/alibaba/excel/write/executor/ExcelWriteFillExecutor.java

@@ -337,15 +337,7 @@ public class ExcelWriteFillExecutor extends AbstractExcelWriteExecutor {
                 }
             }
             if (analysisCell == null) {
-                analysisCell = new AnalysisCell();
-                analysisCell.setRowIndex(rowIndex);
-                analysisCell.setColumnIndex(columnIndex);
-                analysisCell.setOnlyOneVariable(Boolean.TRUE);
-                List<String> variableList = new ArrayList<String>();
-                analysisCell.setVariableList(variableList);
-                List<String> prepareDataList = new ArrayList<String>();
-                analysisCell.setPrepareDataList(prepareDataList);
-                analysisCell.setCellType(WriteTemplateAnalysisCellTypeEnum.COMMON);
+                analysisCell = initAnalysisCell(rowIndex, columnIndex);
             }
             String variable = value.substring(prefixIndex + 1, suffixIndex);
             if (StringUtils.isEmpty(variable)) {
@@ -385,6 +377,19 @@ public class ExcelWriteFillExecutor extends AbstractExcelWriteExecutor {
         return false;
     }
 
+    private AnalysisCell initAnalysisCell(Integer rowIndex, Integer columnIndex) {
+        AnalysisCell analysisCell = new AnalysisCell();
+        analysisCell.setRowIndex(rowIndex);
+        analysisCell.setColumnIndex(columnIndex);
+        analysisCell.setOnlyOneVariable(Boolean.TRUE);
+        List<String> variableList = new ArrayList<String>();
+        analysisCell.setVariableList(variableList);
+        List<String> prepareDataList = new ArrayList<String>();
+        analysisCell.setPrepareDataList(prepareDataList);
+        analysisCell.setCellType(WriteTemplateAnalysisCellTypeEnum.COMMON);
+        return analysisCell;
+    }
+
     private String convertPrepareData(String prepareData) {
         prepareData = prepareData.replaceAll(ESCAPE_FILL_PREFIX, FILL_PREFIX);
         prepareData = prepareData.replaceAll(ESCAPE_FILL_SUFFIX, FILL_SUFFIX);