From 19966fd1c7128c91db2cbee08439bab4f206d0e3 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E9=9B=A8=E6=9C=A8c?= <857448963@qq.com>
Date: Fri, 1 Jul 2022 10:31:34 +0800
Subject: [PATCH] =?UTF-8?q?=E7=94=A8=E8=83=BD=E7=A9=BA=E8=B0=83=E4=BB=A3?=
 =?UTF-8?q?=E7=A0=81=E6=8F=90=E4=BA=A4=20=E7=BB=88=E7=AB=AF=E7=9B=B8?=
 =?UTF-8?q?=E5=85=B3=E4=BB=A3=E7=A0=81=E4=BF=AE=E6=94=B9?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 .../java/com/njcn/poi/excel/ExcelUtil.java    | 27 +++++++++++++++++++
 1 file changed, 27 insertions(+)

diff --git a/pqs-common/common-poi/src/main/java/com/njcn/poi/excel/ExcelUtil.java b/pqs-common/common-poi/src/main/java/com/njcn/poi/excel/ExcelUtil.java
index 344aacf6b..27a0e188a 100644
--- a/pqs-common/common-poi/src/main/java/com/njcn/poi/excel/ExcelUtil.java
+++ b/pqs-common/common-poi/src/main/java/com/njcn/poi/excel/ExcelUtil.java
@@ -5,7 +5,11 @@ import cn.afterturn.easypoi.excel.entity.ExportParams;
 import cn.hutool.core.util.CharsetUtil;
 import com.njcn.web.utils.HttpServletUtil;
 import lombok.extern.slf4j.Slf4j;
+import org.apache.poi.hssf.usermodel.DVConstraint;
+import org.apache.poi.hssf.usermodel.HSSFDataValidation;
+import org.apache.poi.ss.usermodel.Sheet;
 import org.apache.poi.ss.usermodel.Workbook;
+import org.apache.poi.ss.util.CellRangeAddressList;
 
 import javax.servlet.ServletOutputStream;
 import javax.servlet.http.HttpServletResponse;
@@ -80,4 +84,27 @@ public class ExcelUtil {
     }
 
 
+    /**
+     * firstRow 開始行號 根据此项目，默认为2(下标0开始)
+     * lastRow  根据此项目，默认为最大65535
+     * @param firstCol 区域中第一个单元格的列号 (下标0开始)
+     * @param lastCol 区域中最后一个单元格的列号
+     * @param strings 下拉内容
+     * */
+    public static void selectList(Workbook workbook,int firstCol,int lastCol,String[] strings ){
+
+        Sheet sheet = workbook.getSheetAt(0);
+        //  生成下拉列表
+        //  只对(x，x)单元格有效
+        CellRangeAddressList cellRangeAddressList = new CellRangeAddressList(3, 65535, firstCol, lastCol);
+        //  生成下拉框内容
+        DVConstraint dvConstraint = DVConstraint.createExplicitListConstraint(strings);
+        HSSFDataValidation dataValidation = new HSSFDataValidation(cellRangeAddressList, dvConstraint);
+        //  对sheet页生效
+        sheet.addValidationData(dataValidation);
+
+    }
+
+
+
 }