Java Cell.CELL_TYPE_BLANK属性代码示例

private char getCharValue(Cell cell) {
	int vType = getCellType(cell);
	switch (vType) {
	case Cell.CELL_TYPE_BLANK:
		return 0;
	case Cell.CELL_TYPE_NUMERIC:
		return (char) cell.getNumericCellValue();
	case Cell.CELL_TYPE_STRING:
		String vStr = cell.getStringCellValue();
		if (vStr.length() == 1)
			return vStr.charAt(0);
		else
			throw new IllegalArgumentException("Can't get char from String whose length > 1");
	default:
		throw new IllegalArgumentException("Can't get char from type " + vType);
	}
}
 

@Override
public ValueType getNativeValueType(int columnIndex) throws ParseException {
	Cell cell = getCurrentCell(columnIndex);
	final int type = cell.getCellType();
	if (type == Cell.CELL_TYPE_BLANK) {
		return ValueType.EMPTY;
	} else if (type == Cell.CELL_TYPE_STRING) {
		return ValueType.STRING;
	} else if (type == Cell.CELL_TYPE_NUMERIC) {
		if (DateUtil.isCellDateFormatted(cell)) {
			return ValueType.DATE;
		} else {
			return ValueType.NUMBER;
		}
	} else if (type == Cell.CELL_TYPE_FORMULA) {
		if (cell.getCachedFormulaResultType() == Cell.CELL_TYPE_NUMERIC) {
			return ValueType.NUMBER;
		} else {
			return ValueType.STRING;
		}
	} else {
		return ValueType.STRING;
	}
}
 

public Object getCellValue(Cell cell){
    Object value = null;
    DecimalFormat df = new DecimalFormat("0");  //格式化number String字符
    DecimalFormat df2 = new DecimalFormat("0.00");  //格式化数字
    switch (cell.getCellType()) {
        case Cell.CELL_TYPE_STRING:
            value = cell.getRichStringCellValue().getString();
            break;
        case Cell.CELL_TYPE_NUMERIC:
            if("General".equals(cell.getCellStyle().getDataFormatString())) {
                value = df.format(cell.getNumericCellValue());
            } else {
                value = df2.format(cell.getNumericCellValue());
            }
            break;
        case Cell.CELL_TYPE_BOOLEAN:
            value = cell.getBooleanCellValue();
            break;
        case Cell.CELL_TYPE_BLANK:
            value = "";
            break;
        default:
            break;
    }
    return value;
}
 

private double getNumbericValue(Cell cell, Class<? extends Number> clazz) {
	double vRet;
	int vType = getCellType(cell);
	switch (vType) {
	case Cell.CELL_TYPE_BLANK:
		vRet = 0;
		break;
	case Cell.CELL_TYPE_NUMERIC:
		vRet = cell.getNumericCellValue();
		break;
	case Cell.CELL_TYPE_STRING:
		String vStr = cell.getStringCellValue();
		vRet = Double.valueOf(vStr);
		break;
	default:
		throw new IllegalArgumentException("Can't get " + clazz.getSimpleName() + " from type " + vType);
	}
	return vRet;
}
 

private String getStringValue(Cell cell) {
	int vType = getCellType(cell);
	switch (vType) {
	case Cell.CELL_TYPE_STRING:
		return cell.getStringCellValue();
	case Cell.CELL_TYPE_BOOLEAN:
		return String.valueOf(cell.getBooleanCellValue());
	case Cell.CELL_TYPE_NUMERIC:
		double vValue = cell.getNumericCellValue();
		if (doubleIsInt(vValue))
			return String.valueOf((int) vValue);
		return String.valueOf(vValue);
	case Cell.CELL_TYPE_BLANK:
		return "";
	default:
		throw new IllegalArgumentException("Can't get String from type " + vType);
	}
}
 

public static int getEmptyRow(Workbook wb, int sheetIndex, String cellRef) {
	final Sheet sheet = wb.getSheetAt(sheetIndex);
	final CellReference cellReference = new CellReference(cellRef); // һ����A1
	boolean flag = false;
	for (int i = cellReference.getRow(); i <= sheet.getLastRowNum();) {
		final Row r = sheet.getRow(i);
		if (r == null) {
			// ����ǿ��У���û���κ����ݡ���ʽ����ֱ�Ӱ������µ����������ƶ�
			sheet.shiftRows(i + 1, sheet.getLastRowNum(), -1);
			continue;
		}
		flag = false;
		for (final Cell c : r) {
			if (c.getCellType() != Cell.CELL_TYPE_BLANK) {
				flag = true;
				break;
			}
		}
		if (flag) {
			i++;
			continue;
		} else {// ����ǿհ��У�������û�����ݣ�������һ����ʽ��
			if (i == sheet.getLastRowNum())// ����������һ�У�ֱ�ӽ���һ��remove��
				sheet.removeRow(r);
			else// �����û�����һ�У�������������һ��
				sheet.shiftRows(i + 1, sheet.getLastRowNum(), -1);
		}
	}
	return sheet.getLastRowNum() + 1;
}
 

/**
 * 对读取excel的数据进行格式转换
 *
 * @param cell
 * @return
 * @throws Exception
 */
private Object dataFormat(Cell cell) throws Exception {
    try {
        switch (cell.getCellType()) {
            case HSSFCell.CELL_TYPE_NUMERIC:
                return cellTypeNumeric(cell);
            case HSSFCell.CELL_TYPE_STRING:
                return cell.getStringCellValue();
            case Cell.CELL_TYPE_BLANK:
                return "";
            default:
                return cell.getStringCellValue();
        }
    } catch (Exception e) {
        logger.debug("excel数据格式化错误！");
        throw e;
    }
}
 

public void intercepterCellValue(Cell cell, CellWrapper cellWrapper, String interceptor) throws Exception {
	if (cell == null) {
		cellWrapper.setValue(null);
	} else {
		int cellType = cell.getCellType();
		switch (cellType) {
		case Cell.CELL_TYPE_BLANK:
			cellWrapper.setValue(null);
			break;
		case Cell.CELL_TYPE_BOOLEAN:
			cellWrapper.setValue(Boolean.valueOf(cell.getBooleanCellValue()));
			break;
		case Cell.CELL_TYPE_ERROR:
			cellWrapper.setValue(cell.getErrorCellValue());
			break;
		case Cell.CELL_TYPE_FORMULA:
			cellWrapper.setValue(cell.getCellFormula());
			break;
		case Cell.CELL_TYPE_NUMERIC:
			if (DateUtil.isCellDateFormatted(cell)) {
				Date date = cell.getDateCellValue();
				cellWrapper.setValue(date);
			} else {
				cellWrapper.setValue(cell.getNumericCellValue());
			}
			break;
		case Cell.CELL_TYPE_STRING:
			cellWrapper.setValue(cell.getStringCellValue());
			break;
		}
	}
	logger.debug("before interceptor column number[" + cellWrapper.getColumn() + "] cell value[" + cellWrapper.getValue() + "] cell intercepter[" + interceptor + "]");
	this.intercepterCellValue(cellWrapper, interceptor);
	logger.debug("after interceptor  cell value[" + cellWrapper.getValue() + "]");

}
 

@Override
public boolean isMissing(int columnIndex) {
	Cell cell = getCurrentCell(columnIndex);
	try {
		boolean missing = cell == null || cell.getCellType() == Cell.CELL_TYPE_BLANK
				|| cell.getCellType() == Cell.CELL_TYPE_ERROR || "".equals(cell.getStringCellValue().trim());
		return missing;
	} catch (IllegalStateException e) {
		return false;
	}
}
 

/** 从表格之中读取数据并进行处理
 * @param fieldInfo 
 * @param cell 当前cell
 * @return
 * @throws Exception
 */
public  static Object getValue(ImportFieldInfo fieldInfo, Cell cell) throws Exception{
	int size = fieldInfo.getTypeChain().size();
	Class<?> type = fieldInfo.getTypeChain().get(size - 1);
	String dateFormat = fieldInfo.getDateFormat();
	int cellType = cell.getCellType();
	Object obj = null ;
	switch (cellType) {
	case Cell.CELL_TYPE_BLANK:
		return null;
		
	case Cell.CELL_TYPE_BOOLEAN:
		obj = cell.getBooleanCellValue();
		break;
		
	case Cell.CELL_TYPE_STRING:
		obj = cell.getStringCellValue();
		break;
		
	case Cell.CELL_TYPE_NUMERIC:
		if(DateUtil.isCellDateFormatted(cell)){
			obj = DateUtil.getJavaDate(cell.getNumericCellValue());
		}else if(Number.class.isAssignableFrom(type) || ClassUtils.isBaseNumberType(type)){
			//当pojo字段类型是数字型时以数字形式获取
			obj = cell.getNumericCellValue();				
		}else{
			//其他类型都以string获取
			obj = DATA_FORMATTER.formatCellValue(cell);				
		}
		break;
		
	case Cell.CELL_TYPE_ERROR:
		return null;
	}
	if(fieldInfo.getImportProcessor() != null){
		obj = fieldInfo.getImportProcessor().process(obj);
	}
	obj = ConvertUtils.convertIfNeccesary(obj, type, dateFormat);
	return obj;
}
 

private int firstEmptyCellPosition(final Row cells) {
    int columnCount = 0;
    for (Cell cell : cells) {
        if (cell.getCellType() == Cell.CELL_TYPE_BLANK) {
            break;
        }
        columnCount++;
    }
    return columnCount;
}
 

@SuppressWarnings("deprecation")
private Object getValue(Cell raw, String fieldType) throws CellParsingException {
	switch (raw.getCellType()) {
	case Cell.CELL_TYPE_BOOLEAN:
		return raw.getBooleanCellValue();

	case Cell.CELL_TYPE_STRING: {
		String s = raw.getStringCellValue();
		String boolString = s.toLowerCase();
		if (boolString.equals("yes"))
			return true;
		if (boolString.equals("no"))
			return false;
		return s;
	}
	case Cell.CELL_TYPE_NUMERIC:
		if (DateUtil.isCellDateFormatted(raw)) {
			Date date = raw.getDateCellValue();
			return LocalDate.of(date.getYear() + 1900, date.getMonth() + 1, date.getDate());
		}
		return (int) raw.getNumericCellValue();

	// formula parsing doesnot work
	// can be done using FormulaEvaluater
	case Cell.CELL_TYPE_FORMULA:
		return true;

	case Cell.CELL_TYPE_BLANK: {

		return getInstance(fieldType);
	}
	}
	return null;
}
 

private boolean isEmpty(final Row row) {
    Cell firstCell = row.getCell(0);
    boolean rowIsEmpty = (firstCell == null)
            || (firstCell.getCellType() == Cell.CELL_TYPE_BLANK);
    return rowIsEmpty;
}
 

private static boolean isNullCell(Cell cell) {
    return cell == null || Cell.CELL_TYPE_BLANK == cell.getCellType();
}
 

private void processSpreadsheetUpload(Workbook wb, List<Map<QName,String>> users)
    throws IOException
{
    if (wb.getNumberOfSheets() > 1)
    {
        logger.info("Uploaded Excel file has " + wb.getNumberOfSheets() + 
                " sheets, ignoring  all except the first one"); 
    }
    
    int firstRow = 0;
    Sheet s = wb.getSheetAt(0);
    DataFormatter df = new DataFormatter();
    
    String[][] data = new String[s.getLastRowNum()+1][];
                                 
    // If there is a heading freezepane row, skip it
    PaneInformation pane = s.getPaneInformation();
    if (pane != null && pane.isFreezePane() && pane.getHorizontalSplitTopRow() > 0)
    {
        firstRow = pane.getHorizontalSplitTopRow();
        logger.debug("Skipping excel freeze header of " + firstRow + " rows");
    }
    
    // Process each row in turn, getting columns up to our limit
    for (int row=firstRow; row <= s.getLastRowNum(); row++)
    {
        Row r = s.getRow(row);
        if (r != null)
        {
            String[] d = new String[COLUMNS.length];
            for (int cn=0; cn<COLUMNS.length; cn++)
            {
                Cell cell = r.getCell(cn);
                if (cell != null && cell.getCellType() != Cell.CELL_TYPE_BLANK)
                {
                    d[cn] = df.formatCellValue(cell);
                }
            }
            data[row] = d;
        }
    }
    
    // Handle the contents
    processSpreadsheetUpload(data, users);
}