ZK Spreadsheet 点滴

1.4000最大样式错误

 

java.lang.IllegalStateException: The maximum number of cell styles was exceeded. You can define up to 4000 styles in a .xls workbook错误

 

找到zpoi.jar中org.zkoss.poi.hssf.usermodel.HSSFWorkbook修改createCellStyle函数内的最大样式数量即可。重新打zpoi.jar即可。

 

 

public HSSFCellStyle createCellStyle()
    {
    	if(workbook.getNumExFormats() == MAX_STYLES) {
            throw new IllegalStateException("The maximum number of cell styles was exceeded. " +
                    "You can define up to 4000 styles in a .xls workbook");
        }
        ExtendedFormatRecord xfr = workbook.createCellXF();
        short index = (short) (getNumCellStyles() - 1);
        HSSFCellStyle style = new HSSFCellStyle(index, xfr, this);
        workbook.createCellXFExt(index); 
        return style;
    }

 

2.IE兼容问题

如果IE系列的浏览器出现了兼容问题（具体就是显示不出报表来），我已知的可能出现的问题有，Excel模板里有数字已字符串形式写入，或者是写日期格式的单元格出现了写入错误。具体的解决如下。

public static Cell writeNumericValue(Sheet sheet, int row, int column,
			Double value) {
		Row poiRow = sheet.getRow(row);
		if (poiRow == null) {
			poiRow = sheet.createRow(row);
		}
		Cell poiCell = poiRow.getCell(column);

		if (poiCell != null) {
			poiRow.removeCell(poiCell);
		}
		poiCell = poiRow.createCell(column);
		poiCell.setCellType(Cell.CELL_TYPE_NUMERIC);
		poiCell.setCellValue(value);
		return poiCell;
	}

 

public static Cell writeDateValue(Workbook book, Sheet sheet, int row,
			int column, Date value) {
		Row poiRow = sheet.getRow(row);
		CreationHelper createHelper = book.getCreationHelper();
		if (poiRow == null) {
			poiRow = sheet.createRow(row);
		}
		Cell poiCell = poiRow.getCell(column);

		if (poiCell == null) {
			poiCell = poiRow.createCell(column);
		}

		CellStyle cellStyle = book.createCellStyle();
		cellStyle.setDataFormat(createHelper.createDataFormat().getFormat(
				"yyyy-mm-dd"));
		if (value != null) {
			poiCell.setCellValue(value);
		} else {
			poiCell.setCellValue(new Date());
		}
		poiCell.setCellStyle(cellStyle);

		return poiCell;
	}