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修改excel 模板下载功能， 修改下拉框设置 改为隐藏sheet中拉取下拉框内容，避免单元格超255数值上限错误

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furongxin 2024-08-09 22:40:46 +08:00
parent 29aeccb91d
commit 7181d11425
1 changed files with 53 additions and 5 deletions
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58
yudao-framework/yudao-spring-boot-starter-excel/src/main/java/cn/iocoder/yudao/framework/excel/core/util/SpinnerWriteHandler.java
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@ -3,10 +3,7 @@ package cn.iocoder.yudao.framework.excel.core.util;
import com.alibaba.excel.write.handler.SheetWriteHandler;
import com.alibaba.excel.write.metadata.holder.WriteSheetHolder;
import com.alibaba.excel.write.metadata.holder.WriteWorkbookHolder;
import org.apache.poi.ss.usermodel.DataValidation;
import org.apache.poi.ss.usermodel.DataValidationConstraint;
import org.apache.poi.ss.usermodel.DataValidationHelper;
import org.apache.poi.ss.usermodel.Sheet;
import org.apache.poi.ss.usermodel.*;
import org.apache.poi.ss.util.CellRangeAddressList;
import org.apache.poi.xssf.usermodel.XSSFDataValidation;
@ -49,11 +46,40 @@ public class SpinnerWriteHandler implements SheetWriteHandler {
Sheet sheet = writeSheetHolder.getSheet();
/// 开始设置下拉框
DataValidationHelper helper = sheet.getDataValidationHelper();// 设置下拉框
//定义sheet的名称
String hiddenName = "hidden";
//1.创建一个隐藏的sheet 名称为 hidden
Workbook workbook = writeWorkbookHolder.getWorkbook();
Sheet hidden = workbook.createSheet(hiddenName);
Name category1Name = workbook.createName();
category1Name.setNameName(hiddenName);
for (Map.Entry<Integer, String[]> entry : mapDropDown.entrySet()) {
/*** 起始行、终止行、起始列、终止列 **/
CellRangeAddressList addressList = new CellRangeAddressList(1, 1000, entry.getKey(), entry.getKey());
// 获取excel列名
String excelLine = getExcelLine(entry.getKey());
// 循环赋值
String[] values = entry.getValue();
for (int i = 0, length = values.length; i < length; i++) {
// 3:表示你开始的行数 3表示 你开始的列数
Row row = hidden.getRow(i);
if (row == null) {
row = hidden.createRow(i);
}
row.createCell(entry.getKey()).setCellValue(values[i]);
}
// hidden!$H:$1:$H$50 sheet为hidden的 H1列开始H50行数据获取下拉数组
String refers = hiddenName + "!$"+excelLine+
"$1:$"+excelLine +"$"+ (values.length);
/*** 设置下拉框数据 **/
DataValidationConstraint constraint = helper.createExplicitListConstraint(entry.getValue());
DataValidationConstraint constraint = helper.createFormulaListConstraint(refers);
DataValidation dataValidation = helper.createValidation(constraint, addressList);
/*** 处理Excel兼容性问题 **/
if (dataValidation instanceof XSSFDataValidation) {
@ -65,5 +91,27 @@ public class SpinnerWriteHandler implements SheetWriteHandler {
}
sheet.addValidationData(dataValidation);
}
//设置列为隐藏
int hiddenIndex = workbook.getSheetIndex("hidden");
if (!workbook.isSheetHidden(hiddenIndex)) {
workbook.setSheetHidden(hiddenIndex, true);
}
}
/**
* 返回excel列标A-Z-AA-ZZ
* @param num 列数
* @return java.lang.String
*/
public static String getExcelLine(int num) {
String line = "";
int first = num/26;
int second = num % 26;
if (first>0) {
line = (char)('A'+first-1)+"";
}
line += (char)('A'+second)+"";
return line;
}
}