POI EXCEL写入相关问题处理

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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;
 }