From 323fbcbaaecfe53f6ac1d3a2707f34c32cdd4d15 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E5=8F=8B=E4=BA=BAA?= <2330172120@qq.com>
Date: Wed, 13 Apr 2022 03:34:49 +0000
Subject: [PATCH] =?UTF-8?q?update=20ruoyi-common/src/main/java/com/ruoyi/c?=
 =?UTF-8?q?ommon/utils/poi/ExcelUtil.java.=20=E6=96=B0=E5=A2=9E=E4=B8=80?=
 =?UTF-8?q?=E4=B8=AA=20=E5=AF=B9list=E6=95=B0=E6=8D=AE=E6=BA=90=E5=B0=86?=
 =?UTF-8?q?=E5=85=B6=E9=87=8C=E9=9D=A2=E7=9A=84=E6=95=B0=E6=8D=AE=E6=A0=B9?=
 =?UTF-8?q?=E6=8D=AE=E5=AD=97=E6=AE=B5=E5=88=86=E7=BB=84=E5=AF=BC=E5=85=A5?=
 =?UTF-8?q?=E5=88=B0excel=E8=A1=A8=E5=8D=95=E7=9A=84=E6=96=B9=E6=B3=95?=
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---
 .../com/ruoyi/common/utils/poi/ExcelUtil.java | 31 +++++++++++++++++++
 1 file changed, 31 insertions(+)

diff --git a/ruoyi-common/src/main/java/com/ruoyi/common/utils/poi/ExcelUtil.java b/ruoyi-common/src/main/java/com/ruoyi/common/utils/poi/ExcelUtil.java
index c6669fb7f..6fa7a9079 100644
--- a/ruoyi-common/src/main/java/com/ruoyi/common/utils/poi/ExcelUtil.java
+++ b/ruoyi-common/src/main/java/com/ruoyi/common/utils/poi/ExcelUtil.java
@@ -429,6 +429,37 @@ public class ExcelUtil<T>
         return exportExcel();
     }
 
+    /**
+     * 对list数据源将其里面的数据根据字段分组导入到excel表单
+     *
+     * @param list      导出数据集合
+     * @param title     标题
+     * @param fieldName 字段名称
+     * @return 结果
+     */
+    public AjaxResult exportExcelGroupingByFieldName(List<T> list, String title, String fieldName) {
+        if (list == null) {
+            list = new ArrayList<T>();
+        }
+        this.list = list;
+        this.sheetName = title;
+        this.type = Type.EXPORT;
+        this.title = title;
+        createExcelField();
+        //使用stream将list中的数据按照fieldName进行分组
+        Map<String, List<T>> map = list.stream().collect(Collectors.groupingBy(t -> Convert.toStr(ReflectUtils.invokeGetter(t, fieldName))));
+        this.wb = new SXSSFWorkbook(500);
+        if (map.size() > 0) {
+            //map循环 设置多个不同的sheet
+            for (Map.Entry<String, List<T>> entry : map.entrySet()) {
+                this.sheet = wb.createSheet(entry.getKey());
+                this.styles = createStyles(wb);
+                createTitle();
+            }
+        }
+        return exportExcel();
+    }
+
     /**
      * 对list数据源将其里面的数据导入到excel表单
      *