excel读取单元格的时候,遇到不同类型的格式,数字,公式,获取数值

//根据单元格不同类型(数字/文本/公式),获取单元格值
	private String getFormatCellValue(Cell cell) {
		String cellValue = "";
		if (cell == null) {
			return "";
		}
		CellType type = cell.getCellType();
		switch (type) {
			case NUMERIC: // 数字
				cellValue = cell.getNumericCellValue() + "";
				cellValue = new BigDecimal(cellValue==""?"0":cellValue).toPlainString();
				break;
			case STRING: // 字符串
				cellValue = cell.getStringCellValue();
				break;
			case BOOLEAN: // Boolean
				cellValue = cell.getBooleanCellValue() + "";
				break;
			case FORMULA: // 公式
				logger.info("出现公式类型");
				try {
					cellValue = cell.getStringCellValue();
				} catch (IllegalStateException e) {
					cellValue = String.valueOf(cell.getNumericCellValue());
				}
				break;
			case BLANK: // 空值
				cellValue = "";
				break;
			case _NONE: // 故障
				cellValue = "非法字符";
				break;
			default:
				cellValue = "未知类型";
				break;
		}
		return cellValue;
	}