XSSFDataValidationHelper.createDateConstraint有Bug

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注意是：XSSFDataValidationHelper，也即：XSSFDataValidationConstraint(4, operatorType, formula1, formula2)有Bug，HSSF*的没有问题，POI 3.8-POI3.12都试过了，都有此问题

	/**
	 * 设置ExcelSheet数据填写有效性约束
	 * @param sheet 当前Sheet
	 * @param validationType 验证类型
	 * @param operatorType 操作符
	 * @param rowIndex 行索引
	 * @param colIndex 列索引
	 * @param vMin 最小值
	 * @param vMax 最大值
	 * @param errorTitle  出错提示标题
	 * @param errorMsg    出错提示信息
	 */
	public static void setDataValidationCheck(Sheet sheet, int validationType, int operatorType, int rowIndex, int colIndex, String vMin, String vMax, String errorTitle, String errorMsg) {
		if(null==sheet || rowIndex<0 || colIndex <0) {
			return;
		}
		//两个值都为空则返回
		vMin = null == vMin ? "" : vMin.trim();
		vMax = null == vMax ? "" : vMax.trim();
		if("".equals(vMin) && "".equals(vMax)) {
			return;
		}
		//
		DataValidationHelper dvHelper = sheet.getDataValidationHelper();
		DataValidationConstraint dvConstraint = null;
		if(validationType == DataValidationConstraint.ValidationType.TEXT_LENGTH) {
			dvConstraint = dvHelper.createTextLengthConstraint(operatorType, vMin, vMax);
		} else if(validationType == DataValidationConstraint.ValidationType.DECIMAL) {
			dvConstraint = dvHelper.createDecimalConstraint(operatorType, vMin, vMax);
		} else if(validationType == DataValidationConstraint.ValidationType.INTEGER) {
			dvConstraint = dvHelper.createIntegerConstraint(operatorType, vMin, vMax);
		} else if(validationType == DataValidationConstraint.ValidationType.DATE) {
			dvConstraint = dvHelper.createDateConstraint(operatorType, vMin, vMax, null);
		} else if(validationType == DataValidationConstraint.ValidationType.TIME) {
			dvConstraint = dvHelper.createTimeConstraint(operatorType, vMin, vMax);
		}
		if(null == dvConstraint) {
			return;
		}
		CellRangeAddressList addressList = new CellRangeAddressList(rowIndex, getLastRowIndex(sheet.getWorkbook()), colIndex, colIndex);
		DataValidation validation = dvHelper.createValidation(dvConstraint, addressList);
		//设置出错提示信息
		validation.setSuppressDropDownArrow(true);
        validation.setShowErrorBox(true);
		setDataValidationErrorMessage(validation, errorTitle, errorMsg);
		sheet.addValidationData(validation);
	}

官方不知是否已发现这个Bug，没找到POI论坛发表。

XSSFDataValidationHelper.createDateConstraint有Bug

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原文地址：http://blog.csdn.net/maci_hotesion/article/details/47109911