Java?導(dǎo)出Excel增加下拉框選項

更新時間：2022年04月28日 16:50:59 作者：小小小LIN子

這篇文章主要介紹了Java?導(dǎo)出Excel增加下拉框選項，excel對于下拉框較多選項的，需要使用隱藏工作簿來解決，使用函數(shù)取值來做選項，下文具體的操作詳情，需要的小伙伴可以參考一下

excel對于下拉框較多選項的，需要使用隱藏工作簿來解決，使用函數(shù)取值來做選項

選項較少（一般少于5個）：

private static DataValidation setFewDataValidation(Sheet sheet, String[] textList, int firstRow, int endRow, int firstCol, int endCol) {
    DataValidationHelper helper = sheet.getDataValidationHelper();
    //加載下拉列表內(nèi)容
    DataValidationConstraint constraint = helper.createExplicitListConstraint(textList);
    constraint.setExplicitListValues(textList);
    //設(shè)置數(shù)據(jù)有效性加載在哪個單元格上。四個參數(shù)分別是：起始行、終止行、起始列、終止列
    CellRangeAddressList regions = new CellRangeAddressList((short) firstRow, (short) endRow, (short) firstCol, (short) endCol);
    //數(shù)據(jù)有效性對象
    return helper.createValidation(constraint, regions);
}

選項較多

創(chuàng)建隱藏工作簿:

Sheet sheetHidden = wb.createSheet("Sheet2");
wb.setSheetHidden(1, true);

每一個列表占用一列

當(dāng)然也可以每個列表使用一張工作簿，只用第一列。這里是使用一個工作簿使用每個列，先26個字母，一般夠用了

String[] arr = {"A", "B", "C", "D", "E", "F", "G", "H", "I", "J", "K", "L", "M", "N", "O", "P", "Q", "R", "S", "T", "U", "V", "W", "X", "Y", "Z"};

for (int j = 0; j < dataList.size(); j++) {
    if (index == 0) { //第1個下拉選項，直接創(chuàng)建行、列
        row = sheetHidden.createRow(j); //創(chuàng)建數(shù)據(jù)行
        //      sheetHidden.setColumnWidth(j, 4000); //設(shè)置每列的列寬
        row.createCell(0).setCellValue(dataList.get(j)); //設(shè)置對應(yīng)單元格的值
    } else { //非第1個下拉選項
        int rowCount = sheetHidden.getLastRowNum();
        if (j <= rowCount) { //前面創(chuàng)建過的行，直接獲取行，創(chuàng)建列
            //獲取行，創(chuàng)建列
            sheetHidden.getRow(j).createCell(index).setCellValue(dataList.get(j)); //設(shè)置對應(yīng)單元格的值

        } else { //未創(chuàng)建過的行，直接創(chuàng)建行、創(chuàng)建列
            //  sheetHidden.setColumnWidth(j, 4000); //設(shè)置每列的列寬
            //創(chuàng)建行、創(chuàng)建列
            sheetHidden.createRow(j).createCell(index).setCellValue(dataList.get(j)); //設(shè)置對應(yīng)單元格的值
        }
    }
}

index 代表第幾個下拉框，也就是在隱藏工作簿的第幾列，dataList表示下拉框的內(nèi)容

創(chuàng)建公式：

String strFormula = "Sheet2!$" + arr[index] + "$1:$" + arr[index] + "$" + dataList.size();

Sheet2第A1到A5000作為下拉列表來源數(shù)據(jù)

xls和xlsx生成下拉框的選項不一樣

private static DataValidation setMoreDataValidation(Workbook wb, Sheet sheet, String strFormula, int startRow, int endRow, int startColumn, int endColumn) {

    DataValidation dataValidation;
    // 設(shè)置數(shù)據(jù)有效性加載在哪個單元格上,四個參數(shù)分別是：起始行、終止行、起始列、終止列
    CellRangeAddressList regions = new CellRangeAddressList(startRow, endRow, startColumn, endColumn);
    if (wb instanceof XSSFWorkbook) {
        //獲取新sheet頁內(nèi)容
        XSSFDataValidationConstraint constraint = new XSSFDataValidationConstraint(DataValidationConstraint.ValidationType.LIST, strFormula);
        // 設(shè)置數(shù)據(jù)有效性加載在哪個單元格上,四個參數(shù)分別是：起始行、終止行、起始列、終止列
        // 數(shù)據(jù)有效性對象
        DataValidationHelper help = new XSSFDataValidationHelper((XSSFSheet) sheet);
        dataValidation = help.createValidation(constraint, regions);
        dataValidation.setSuppressDropDownArrow(true);
        dataValidation.setShowErrorBox(true);
    } else {
        // 設(shè)置數(shù)據(jù)有效性加載在哪個單元格上。四個參數(shù)分別是：起始行、終止行、起始列、終止列
        DVConstraint constraint = DVConstraint.createFormulaListConstraint(strFormula);
        dataValidation = new HSSFDataValidation(regions, constraint);
        dataValidation.setSuppressDropDownArrow(false);
    }
    dataValidation.setEmptyCellAllowed(true);
    dataValidation.setShowPromptBox(true);
    dataValidation.createErrorBox("Error", "請選擇下拉框中的數(shù)據(jù)");
    dataValidation.createPromptBox("提示", "只能選擇下拉框里面的數(shù)據(jù)");
    return dataValidation;

}

加入工作簿:

sheet.addValidationData()

完整代碼:

private static void setValidationDate(Workbook wb, Sheet sheet, List<DataValidationCell> dataValidationCellList) {
    if (dataValidationCellList.isEmpty()) {
        return;
    }
    String[] arr = {"A", "B", "C", "D", "E", "F", "G", "H", "I", "J", "K", "L", "M", "N", "O", "P", "Q", "R", "S", "T", "U", "V", "W", "X", "Y", "Z"};
    int index = 0;
    Row row;
    Sheet sheetHidden = wb.createSheet("Sheet2");
    wb.setSheetHidden(1, true);
    for (DataValidationCell dataValidationCell : dataValidationCellList) {
        List<String> dataList = dataValidationCell.getDataList();
        if (CollectionUtils.isEmpty(dataList)) {
            continue;
        }
        if (dataList.size() <= 5) {
            sheet.addValidationData(setFewDataValidation(sheet, dataList.toArray(new String[0]),
                    dataValidationCell.getStartRow(), dataValidationCell.getEndRow(),
                    dataValidationCell.getStartColumn(), dataValidationCell.getEndColumn())); //超過255個報錯
        } else {
            //String strFormula = "Sheet2!$A$1:$A$5000" ; //Sheet2第A1到A5000作為下拉列表來源數(shù)據(jù)
            String strFormula = "Sheet2!$" + arr[index] + "$1:$" + arr[index] + "$" + dataList.size(); //Sheet2第A1到A5000作為下拉列表來源數(shù)據(jù)
            sheet.addValidationData(setMoreDataValidation(wb, sheet, strFormula,
                    dataValidationCell.getStartRow(), dataValidationCell.getEndRow(),
                    dataValidationCell.getStartColumn(), dataValidationCell.getEndColumn())); //下拉列表元素很多的情況
            //2、生成sheet2內(nèi)容
            for (int j = 0; j < dataList.size(); j++) {
                if (index == 0) { //第1個下拉選項，直接創(chuàng)建行、列
                    row = sheetHidden.createRow(j); //創(chuàng)建數(shù)據(jù)行
                    //      sheetHidden.setColumnWidth(j, 4000); //設(shè)置每列的列寬
                    row.createCell(0).setCellValue(dataList.get(j)); //設(shè)置對應(yīng)單元格的值
                } else { //非第1個下拉選項
                    int rowCount = sheetHidden.getLastRowNum();
                    if (j <= rowCount) { //前面創(chuàng)建過的行，直接獲取行，創(chuàng)建列
                        //獲取行，創(chuàng)建列
                        sheetHidden.getRow(j).createCell(index).setCellValue(dataList.get(j)); //設(shè)置對應(yīng)單元格的值
                    } else { //未創(chuàng)建過的行，直接創(chuàng)建行、創(chuàng)建列
                        //  sheetHidden.setColumnWidth(j, 4000); //設(shè)置每列的列寬
                        //創(chuàng)建行、創(chuàng)建列
                        sheetHidden.createRow(j).createCell(index).setCellValue(dataList.get(j)); //設(shè)置對應(yīng)單元格的值
                    }
                }
            }
            index++;
        }
    }
}

public static class DataValidationCell{
    private int startRow;
    private int endRow;
    private int startColumn;
    private int endColumn;
    private List<String> dataList;
}

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