根据客户要求需要添加数据有效性验证。但是在查找多方资料后发现,POI无法读取到文件中的有效性验证,只能添加。无奈之下只能通过配置文件的方式去添加了。
给Excel添加数据有效性的验证,xls格式和xlsx格式不同,通过阅读官方文档,总结出了以下方法
/** * 添加数据有效性检查. * @param sheet 要添加此检查的Sheet * @param firstRow 开始行 * @param lastRow 结束行 * @param firstCol 开始列 * @param lastCol 结束列 * @param explicitListValues 有效性检查的下拉列表 * @throws IllegalArgumentException 如果传入的行或者列小于0(< 0)或者结束行/列比开始行/列小 */ public static void setValidationData(Sheet sheet, int firstRow, int lastRow, int firstCol, int lastCol,String[] explicitListValues) throws IllegalArgumentException{ if (firstRow < 0 || lastRow < 0 || firstCol < 0 || lastCol < 0 || lastRow < firstRow || lastCol < firstCol) { throw new IllegalArgumentException("Wrong Row or Column index : " + firstRow+":"+lastRow+":"+firstCol+":" +lastCol); } if (sheet instanceof XSSFSheet) { XSSFDataValidationHelper dvHelper = new XSSFDataValidationHelper((XSSFSheet)sheet); XSSFDataValidationConstraint dvConstraint = (XSSFDataValidationConstraint) dvHelper .createExplicitListConstraint(explicitListValues); CellRangeAddressList addressList = new CellRangeAddressList(firstRow, lastRow, firstCol, lastCol); XSSFDataValidation validation = (XSSFDataValidation) dvHelper.createValidation(dvConstraint, addressList); validation.setSuppressDropDownArrow(true); validation.setShowErrorBox(true); sheet.addValidationData(validation); } else if(sheet instanceof HSSFSheet){ CellRangeAddressList addressList = new CellRangeAddressList(firstRow, lastRow, firstCol, lastCol); DVConstraint dvConstraint = DVConstraint.createExplicitListConstraint(explicitListValues); DataValidation validation = new HSSFDataValidation(addressList, dvConstraint); validation.setSuppressDropDownArrow(true); validation.setShowErrorBox(true); sheet.addValidationData(validation); } }
以上代码参考自官方文档:http://poi.apache.org/spreadsheet/quick-guide.html#Validation
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