Using an example of data read excel poi

Using an example of data read excel poi

Two cases:

　　A method of reading the value of a specified cell

　　Another is to read the value of the entire row

 

Dependencies:

<dependency>
    <groupId>org.apache.poi</groupId>
    <artifactId>poi</artifactId>
    <version>3.15</version>
</dependency>

Code Example:

    public String getCellFromExcel(String path, String row, String col) throws Exception {
        return getCellFromExcel(path, 0, Integer.valueOf(row), Integer.valueOf(col));
    }

    public String getRowFromExcel(String path, String row) throws Exception {
        return getRowFromExcel(path, 0, Integer.valueOf(row));
    }

    public String getRowFromExcel(String path, int sheet, int row) throws Exception {
        File xlsx = new File(path);
        Workbook workbook = WorkbookFactory.create(xlsx);
        Sheet sheet1 = workbook.getSheetAt(sheet);
        Row row1 = sheet1.getRow(row);
        List<String> list = new ArrayList<>();
        int rowNum = row1.getLastCellNum();
        for (int i = 0; i < rowNum; i++) {
            list.add(getCellValueByCell(row1.getCell(i)));
        }
        logger.info("文件名：{}，sheet：{}，row：{}，取值：{}", path, sheet, row, list.toString());
        return list.toString();
    }


    public String getCellFromExcel(String path, int sheet, int row, int col) throws Exception {
        File xlsx = new File(path);
        Workbook workbook = WorkbookFactory.create(xlsx);
        Sheet sheet1 = workbook.getSheetAt(sheet);
        Row row1 = sheet1.getRow(row);
        String cell = getCellValueByCell(row1.getCell(col));
        logger.info("文件名：{}，sheet：{}，row：{}，col：{}，取值：{}", path, sheet, row, col, cell);
        return cell;
    }

    // Get the value of various types of cells, returns a string type 
    Private  static String getCellValueByCell (the Cell Cell) {
         // determines whether an empty string is null or 
        IF (Cell == null || cell.toString (). TRIM (). The equals ( "" )) {
             return "" ; 
        } 
        String CellValue = "" ;
         int celltype = cell.getCellType (); 

        // the following are types of data judgment 
        Switch (celltype) {
             Case HSSFCell.CELL_TYPE_NUMERIC: // digital 

                IF (0 cell.getCellType == ()) { // type determining cell type is NUMERIC or 
                    if (HSSFDateUtil.isCellDateFormatted(cell)) {// 判断是否为日期类型
                        Date date = cell.getDateCellValue();
                        DateFormat formater = new SimpleDateFormat(
                                "yyyy-MM-dd HH:mm");
                        cellValue = formater.format(date);
                    } else {
                        cellValue = cell.getNumericCellValue() + "";
                    }
                }
                break;


            case HSSFCell.CELL_TYPE_STRING: // 字符串
                cellValue = cell.getStringCellValue();
                break;


            case HSSFCell.CELL_TYPE_BOOLEAN: // Boolean
                cellValue = cell.getBooleanCellValue() + "";
                break;


            case HSSFCell.CELL_TYPE_FORMULA: // 公式
                cellValue = cell.getCellFormula() + "";
                break;


            case HSSFCell.CELL_TYPE_BLANK: // 空值
                cellValue = "";
                break;


            case HSSFCell.CELL_TYPE_ERROR: //Fault 
                cellValue = "illegal character" ;
                 BREAK ; 


            default : 
                CellValue = "Unknown type" ;
                 BREAK ; 

        } 
        return CellValue; 
    }