uniapp与webview进行数据通信

/**
 * <p>设置某列的数据验证</p>
 * @param Sheet 作用于哪一个sheet
 * @param colIndex 需要增加数据验证的列的索引
 * @String[] names 数据验证的序列，就是excel下拉列表的内容
 */
public static void setDataValidation(Sheet sheet, int colIndex, String[] names) {
    //直接用给定的数据创建显式序列
	DataValidationConstraint constraint = sheet.getDataValidationHelper().createExplicitListConstraint(names);
	constraint.setOperator(DataValidationConstraint.OperatorType.BETWEEN);
    //创建一个区域，某列的第2行到第65535行，一般第一行是标题列
	CellRangeAddressList addressList = new CellRangeAddressList(1,65535,colIndex,colIndex);
	DataValidation validation = sheet.getDataValidationHelper().createValidation(constraint, addressList);
	validation.setErrorStyle(DataValidation.ErrorStyle.STOP);
    //不允许单元格为空
	validation.setEmptyCellAllowed(false);
	validation.setShowErrorBox(true);
    //添加数据验证到sheet中
	sheet.addValidationData(validation);
}

@Test
public void test(){
    Workbook workbook = WorkbookFactory.create(true);//xlsx
    Sheet sheet = workbook.createSheet("测试");
    //先创建65535行
    for (int i = 0; i < 65535; i++) {
        Row row = sheet.getRow(i);
        if (Objects.isNull(row))
            row=sheet.createRow(i);
        Cell cell = row.getCell(0);
        if (Objects.isNull(cell))
            cell = row.createCell(0);
    }
    //下拉列表的数据
    String[] strs = {"借","贷"};
    setDataValidation(sheet,0,strs);
    workbook.write(new FileOutputStream("D:\\poitest\\测试.xlsx"));
}

/**
 * <p>设置某列的数据验证</p>
 * @param Sheet 作用于哪一个sheet
 * @param colIndex 需要增加数据验证的列的索引
 * @String formula 公式，引用隐藏sheet的数据
 */
public static void setDataValidationByFormula(Sheet sheet, int colIndex, String formula) {
    //直接用给定的公式创建
	DataValidationConstraint constraint = sheet.getDataValidationHelper().createFormulaListConstraint(formula);
	constraint.setOperator(DataValidationConstraint.OperatorType.BETWEEN);
    //创建一个区域，某列的第2行到第65535行，一般第一列是标题列
	CellRangeAddressList addressList = new CellRangeAddressList(1,65535,colIndex,colIndex);
	DataValidation validation = sheet.getDataValidationHelper().createValidation(constraint, addressList);
	validation.setErrorStyle(DataValidation.ErrorStyle.STOP);
    //不允许单元格为空
	validation.setEmptyCellAllowed(false);
	validation.setShowErrorBox(true);
    //添加数据验证到sheet中
	sheet.addValidationData(validation);
}

@Test
public void test(){
    Workbook workbook = WorkbookFactory.create(true);//xlsx
    Sheet sheet = workbook.createSheet("测试");
    //先创建65535行
    for (int i = 0; i < 65535; i++) {
        Row row = sheet.getRow(i);
        if (Objects.isNull(row))
            row=sheet.createRow(i);
        Cell cell = row.getCell(0);
        if (Objects.isNull(cell))
            cell = row.createCell(0);
    }
    //下拉列表的数据,一般从数据库取出
    List<String> acctitleList = getAcctitleList();
    Sheet hiddenSheet = workbook.createSheet("hidden");
    for (int i = 0; i < acctitleList.size(); i++) {
        Row row = hiddenSheet.createRow(i);
        Cell cell = row.createCell(0);
        cell.setCellValue(acctitleList.get(i));
    }
    //hidden 的索引为1，隐藏sheet
    workbook.setSheetHidden(1,true);
    //格式为  sheet名字!$起始列名$起始行号:$结束列名$结束行号
    String formula = "hidden!$A$1:$A$"+acctitleList.size();
    setDataValidation(sheet,0,formula);
    workbook.write(new FileOutputStream("D:\\poitest\\测试.xlsx"));
}
/**
 * 模拟从数据库中取数据
 */
private List<String> getAcctitleList(){
    List<String> list = new ArrayList<>();
    list.add("6405020000 | 税金及附加-土地增值税");
    list.add("6405090000 | 税金及附加-城市维护建设税");
    list.add("6405100000 | 税金及附加-教育费附加");
    list.add("6405030000 | 税金及附加-房产税");
    list.add("6405040000 | 税金及附加-土地使用税");
    list.add("6405110000 | 税金及附加-地方教育附加");
    list.add("6405080000 | 税金及附加-印花税");
    list.add("6405120000 | 税金及附加-水利建设基金");
    list.add("2221210000 | 应交税费-应交城市维护建设税");
    list.add("2221140000 | 应交税费-应交土地增值税");
    list.add("2221220000 | 应交税费-应交教育费附加");
    list.add("2221150000 | 应交税费-应交房产税");
    list.add("2221160000 | 应交税费-应交土地使用税");
    list.add("2221230000 | 应交税费-应交地方教育费附加");
    list.add("2221200000 | 应交税费-应交印花税");
    list.add("2221240000 | 应交税费-水利建设基金");
    list.add("5005040400 | 服务成本-劳务费-保绿费");
    list.add("2241050000 | 其他应付款-暂估/预提费");
    return list;
}