java excel类

摘要：单元格各类型数据读取基本类型处理的数据包括字符型数据，数字日期公式等。下面是单元格类型说明实例解析中数据，要求转换为文本方式存储写一个解析的抽象类版本的版本的解析的文件格式有误

1.单元格各类型数据读取

1.1 基本类型

处理的Excel数据包括字符型数据，数字、日期、公式等。

下面是单元格类型说明：

2实例
解析excel中数据，要求转换为文本方式存储
2.1 写一个excel解析的抽象类

public abstract class ExcelParser {

        private String fileName;
        private InputStream inputStream;
    
        private final static String excel2003L = ".xls";//2003- 版本的excel
        private final static String excel2007U = ".xlsx";//2007+ 版本的excel
    
        protected final static DecimalFormat decimalFormat = new DecimalFormat("0");
        protected final static SimpleDateFormat simpleDateFormat = new SimpleDateFormat("yyyy/MM/dd");
    
        protected final static String[] columnStr = new String[]{
                "A", "B", "C", "D", "E", "F", "G", "H", "I", "J", "K", "L", "M", "N", "O", "P", "Q", "R", "S", "T", "U", "V", "W", "X", "Y", "Z"
        };
           protected OrderExcelParser(String fileName, InputStream inputStream) {
            this.fileName = fileName;
            this.inputStream = inputStream;
        }
    
        protected Workbook getWorkbook() throws Exception {
            try {
                String fileType = fileName.substring(fileName.lastIndexOf("."));
                if (excel2003L.equals(fileType)) {
                    return new HSSFWorkbook(inputStream); //2003-
                } else if (excel2007U.equals(fileType)) {
                    return new XSSFWorkbook(inputStream); //2007+
                } else {
                    throw new Exception();
                }
            } catch (Exception e) {
                throw new Exception("解析的文件格式有误！");
            }
        }
    
        protected abstract void parseTitles(int rowIndex) throws Exception;
    
        protected String getCellStringValue(Cell cell) throws Exception {
            String cellValue = "";
            if (cell == null) {
                return cellValue;
            } else if (cell.getCellType() == Cell.CELL_TYPE_STRING) {
                cellValue = cell.getStringCellValue();
            } else if (cell.getCellType() == Cell.CELL_TYPE_NUMERIC) {
                if (HSSFDateUtil.isCellDateFormatted(cell)) {
                    double d = cell.getNumericCellValue();
                    Date date = HSSFDateUtil.getJavaDate(d);
                    cellValue = simpleDateFormat.format(date);
                } else {
                    cellValue = decimalFormat.format((cell.getNumericCellValue()));
                }
            } else if (cell.getCellType() == Cell.CELL_TYPE_BLANK) {
                cellValue = "";
            } else if (cell.getCellType() == Cell.CELL_TYPE_BOOLEAN) {
                cellValue = String.valueOf(cell.getBooleanCellValue());
            } else if (cell.getCellType() == Cell.CELL_TYPE_ERROR) {
                cellValue = "";
            } else if (cell.getCellType() == Cell.CELL_TYPE_FORMULA) {
                cellValue = cell.getCellFormula();
            }
           
            return cellValue.trim();
        }
    }