From 86892d5963dbbe9c8c96294994601b29ab1a65bd Mon Sep 17 00:00:00 2001
From: dr5hx <1165372212@qq.com>
Date: Thu, 18 Dec 2025 15:24:19 +0800
Subject: [PATCH] =?UTF-8?q?feat(excel):=20=E5=A2=9E=E5=BC=BA=E5=8D=95?=
 =?UTF-8?q?=E5=85=83=E6=A0=BC=E5=90=88=E5=B9=B6=E5=A4=84=E7=90=86=E9=80=BB?=
 =?UTF-8?q?=E8=BE=91?=
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- 新增支持自定义行索引的构造函数
- 添加防止同行重复合并的判断逻辑
- 提供静态工厂方法用于创建合并处理器实例
- 扩展合并策略以支持指定起始行索引
---
 .../common/excel/core/CellMergeHandler.java   | 19 ++++++++++++++++++-
 .../common/excel/core/CellMergeStrategy.java  |  4 ++++
 2 files changed, 22 insertions(+), 1 deletion(-)

diff --git a/ruoyi-common/ruoyi-common-excel/src/main/java/org/dromara/common/excel/core/CellMergeHandler.java b/ruoyi-common/ruoyi-common-excel/src/main/java/org/dromara/common/excel/core/CellMergeHandler.java
index 1a0601479..6a1a3a72d 100644
--- a/ruoyi-common/ruoyi-common-excel/src/main/java/org/dromara/common/excel/core/CellMergeHandler.java
+++ b/ruoyi-common/ruoyi-common-excel/src/main/java/org/dromara/common/excel/core/CellMergeHandler.java
@@ -29,7 +29,10 @@ public class CellMergeHandler {
         // 行合并开始下标
         this.rowIndex = hasTitle ? 1 : 0;
     }
-
+    private CellMergeHandler(final boolean hasTitle, final int rowIndex) {
+        this.hasTitle = hasTitle;
+        this.rowIndex = hasTitle ? rowIndex : 0;
+    }
     @SneakyThrows
     public List<CellRangeAddress> handle(List<?> rows) {
         // 如果入参为空集合则返回空集
@@ -103,6 +106,10 @@ public class CellMergeHandler {
                 }
 
                 if (isAddResult && i > current) {
+                    //如果是同一行，则跳过合并
+                    if (current + rowIndex == lastRow) {
+                        continue;
+                    }
                     result.add(new CellRangeAddress(current + rowIndex, lastRow, colNum, colNum));
                 }
             }
@@ -177,6 +184,16 @@ public class CellMergeHandler {
             return new FieldColumnIndex(colIndex, cellMerge);
         }
     }
+    /**
+     * 创建一个单元格合并处理器实例
+     *
+     * @param hasTitle 是否合并标题
+     * @param rowIndex 行索引
+     * @return 单元格合并处理器
+     */
+    public static CellMergeHandler of(final boolean hasTitle, final int rowIndex) {
+        return new CellMergeHandler(hasTitle, rowIndex);
+    }
 
     /**
      * 创建一个单元格合并处理器实例
diff --git a/ruoyi-common/ruoyi-common-excel/src/main/java/org/dromara/common/excel/core/CellMergeStrategy.java b/ruoyi-common/ruoyi-common-excel/src/main/java/org/dromara/common/excel/core/CellMergeStrategy.java
index 5576c6383..64d8c7779 100644
--- a/ruoyi-common/ruoyi-common-excel/src/main/java/org/dromara/common/excel/core/CellMergeStrategy.java
+++ b/ruoyi-common/ruoyi-common-excel/src/main/java/org/dromara/common/excel/core/CellMergeStrategy.java
@@ -31,6 +31,10 @@ public class CellMergeStrategy extends AbstractMergeStrategy implements SheetWri
         this.cellList = CellMergeHandler.of(hasTitle).handle(list);
     }
 
+    public CellMergeStrategy(List<?> list, boolean hasTitle, int rowIndex) {
+        this.cellList = CellMergeHandler.of(hasTitle, rowIndex).handle(list);
+    }
+
     @Override
     protected void merge(Sheet sheet, Cell cell, Head head, Integer relativeRowIndex) {
         if (CollUtil.isEmpty(cellList)) {