From 2aae9bc026714ef3d05628d66986e1674e34eb05 Mon Sep 17 00:00:00 2001
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Date: Tue, 31 May 2022 13:40:05 +0800
Subject: [PATCH] =?UTF-8?q?update=20=E4=BC=98=E5=8C=96=20ExcelUtil=20?=
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---
 .../ruoyi/common/excel/utils/ExcelUtil.java   | 29 ++++++++++++++++---
 1 file changed, 25 insertions(+), 4 deletions(-)

diff --git a/ruoyi-common/ruoyi-common-excel/src/main/java/com/ruoyi/common/excel/utils/ExcelUtil.java b/ruoyi-common/ruoyi-common-excel/src/main/java/com/ruoyi/common/excel/utils/ExcelUtil.java
index f1f39fc4..450dc6b8 100644
--- a/ruoyi-common/ruoyi-common-excel/src/main/java/com/ruoyi/common/excel/utils/ExcelUtil.java
+++ b/ruoyi-common/ruoyi-common-excel/src/main/java/com/ruoyi/common/excel/utils/ExcelUtil.java
@@ -2,10 +2,12 @@ package com.ruoyi.common.excel.utils;
 
 import cn.hutool.core.util.IdUtil;
 import com.alibaba.excel.EasyExcel;
+import com.alibaba.excel.write.builder.ExcelWriterSheetBuilder;
 import com.alibaba.excel.write.style.column.LongestMatchColumnWidthStyleStrategy;
-import com.ruoyi.common.excel.convert.ExcelBigNumberConvert;
 import com.ruoyi.common.core.utils.StringUtils;
 import com.ruoyi.common.core.utils.file.FileUtils;
+import com.ruoyi.common.excel.convert.ExcelBigNumberConvert;
+import com.ruoyi.common.excel.core.CellMergeStrategy;
 import com.ruoyi.common.excel.core.DefaultExcelListener;
 import com.ruoyi.common.excel.core.ExcelListener;
 import com.ruoyi.common.excel.core.ExcelResult;
@@ -69,22 +71,41 @@ public class ExcelUtil {
      *
      * @param list      导出数据集合
      * @param sheetName 工作表的名称
-     * @return 结果
+     * @param clazz     实体类
+     * @param response  响应体
      */
     public static <T> void exportExcel(List<T> list, String sheetName, Class<T> clazz, HttpServletResponse response) {
+        exportExcel(list, sheetName, clazz, false, response);
+    }
+
+    /**
+     * 导出excel
+     *
+     * @param list      导出数据集合
+     * @param sheetName 工作表的名称
+     * @param clazz     实体类
+     * @param merge     是否合并单元格
+     * @param response  响应体
+     */
+    public static <T> void exportExcel(List<T> list, String sheetName, Class<T> clazz, boolean merge, HttpServletResponse response) {
         try {
             String filename = encodingFilename(sheetName);
             response.reset();
             FileUtils.setAttachmentResponseHeader(response, filename);
             response.setContentType("application/vnd.openxmlformats-officedocument.spreadsheetml.sheet;charset=UTF-8");
             ServletOutputStream os = response.getOutputStream();
-            EasyExcel.write(os, clazz)
+            ExcelWriterSheetBuilder builder = EasyExcel.write(os, clazz)
                 .autoCloseStream(false)
                 // 自动适配
                 .registerWriteHandler(new LongestMatchColumnWidthStyleStrategy())
                 // 大数值自动转换 防止失真
                 .registerConverter(new ExcelBigNumberConvert())
-                .sheet(sheetName).doWrite(list);
+                .sheet(sheetName);
+            if (merge) {
+                // 合并处理器
+                builder.registerWriteHandler(new CellMergeStrategy(list, true));
+            }
+            builder.doWrite(list);
         } catch (IOException e) {
             throw new RuntimeException("导出Excel异常");
         }