下拉框255限制

HSSFSheet hidden = wk.createSheet("hidden");
HSSFCell cell = null;
for (int i = 0, length= strs.length; i < length; i++) { String name = strs[i]; HSSFRow row = hidden.createRow(i);
    cell = row.createCell(0); cell.setCellValue(name); }
CellRangeAddressList regions = new CellRangeAddressList(0,0, 0, 0);
//获取单元格的坐标
System.out.println(regions.getCellRangeAddress(0).formatAsString()); Name namedCell = wk.createName(); namedCell.setNameName("hidden"); namedCell.setRefersToFormula("hidden!A1:A" + strs.length);
//加载数据,将名称为hidden的
DVConstraint constraint = DVConstraint.createFormulaListConstraint("hidden");
// 设置数据有效性加载在哪一个单元格上,四个参数分别是：起始行、终止行、起始列、终止列
CellRangeAddressList addressList = new CellRangeAddressList(2, 65535, 0, 0);
HSSFDataValidation validation = new HSSFDataValidation(addressList, constraint);
//将第二个sheet设置为隐藏
wk.setSheetHidden(1, true); st.addValidationData(validation);