Cannot get a STRING value from a NUMERIC cell
错误一：
导入Excel表格数据，该列设置数据类型为String，输入数据是int类型
解决方法：cell.setCellType(CellType.STRING);
错误二：日期类型需要定义格式
解决方法如下：
 

 protected Object getCellFormatValue(Cell cell) {Object val = "";if (null != cell) {if (cell.getCellType() == CellType.NUMERIC || cell.getCellType() == CellType.FORMULA){val = cell.getNumericCellValue();if (DateUtil.isCellDateFormatted(cell)){val = DateUtil.getJavaDate((Double) val); // POI Excel 日期格式转换}else{if ((Double) val % 1 != 0){val = new BigDecimal(val.toString());}else{val = new DecimalFormat("0").format(val);}}}else if (cell.getCellType() == CellType.STRING){val = cell.getStringCellValue();}else if (cell.getCellType() == CellType.BOOLEAN){val = cell.getBooleanCellValue();}else if (cell.getCellType() == CellType.ERROR){val = cell.getErrorCellValue();}} else {val = "";}return val;}

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