增加java

Question

实际上我尝试使用java在HSSFCell中存储一些数据，但是我收到了类似

的错误

java.lang.IllegalArgumentException: The maximum length of cell contents (text) i
s 32,767 characters
        at org.apache.poi.hssf.usermodel.HSSFCell.setCellValue(HSSFCell.java:559
)
        at org.apache.poi.hssf.usermodel.HSSFCell.setCellValue(HSSFCell.java:533
)
        at application.ExtractUI.datatoexcel(ExtractUI.java:272)
        at application.ExtractUI$3.getData(ExtractUI.java:208)
        at application.ExtractUI$3.handle(ExtractUI.java:198)
        at application.ExtractUI$3.handle(ExtractUI.java:1)

任何人都可以建议我增加细胞长度的方法，即超过32767个字符???

我使用了以下代码，我得到了上述错误

 public void datatoexcel(ResultSet rs) {
        try {
            int iter = 0;
            ResultSetMetaData rmeta = rs.getMetaData();
            int col = rmeta.getColumnCount();
            HSSFWorkbook workbook = new HSSFWorkbook();

            Date date = new Date();

            SimpleDateFormat sdf = new SimpleDateFormat("ddMMyyyy HHmmss");
            String pa = pth + "\\" + sdf.format(date) + ".xlsx";
            System.out.println(pa);
            FileOutputStream out = new FileOutputStream(new File(pa));
            HSSFSheet sheet = workbook.createSheet();
            HSSFRow myRow = null;
            HSSFCell myCell = null;
            // Font style for headers
            HSSFFont boldFont = workbook.createFont();
            boldFont.setBoldweight(HSSFFont.BOLDWEIGHT_BOLD);
            boldFont.setColor(HSSFFont.COLOR_RED);
            HSSFCellStyle cellStyle = workbook.createCellStyle();
            cellStyle.setFont(boldFont);
            while (rs.next()) {
                // limit the data to 1000 anad create a new sheet
                if (iter == 1000) {
                    sheet = workbook.createSheet();
                    iter = 0;
                }
                // Adding header to the first row
                if (iter == 0) {
                    myRow = sheet.createRow(iter);
                    for (int k = 1, j = 0; k <= col && j < col; k++) {
                        myCell = myRow.createCell( j);

                        myCell.setCellValue(rmeta.getColumnName(k));
                        // set style to font
                        myCell.setCellStyle(cellStyle);

                        j++;
                    }
                    iter++;
                }
                // Adding data from 2nd Row
                myRow = sheet.createRow(iter);
                for (int k = 1, j = 0; k <= col && j < col; k++) {

                    myRow.createCell( j).setCellValue(
                            rs.getString(rmeta.getColumnName(k)));
                    j++;
                }
                iter++;
            }

            workbook.write(out);

            out.close();


        } catch (Exception e) {
            e.printStackTrace();
        }

    }

任何建议??

Answer 1

您唯一的选择是切换文件格式。 .xls和.xlsx文件格式的严重限制为32,767个字符。 Apache POI只是强制执行文件格式+ Excel限制。您可以在Microsoft文档中查看这些限制的详细信息，也可以在this Apache POI javadoc page

中很好地捕获

如果您确实需要长文本，则需要切换到其他文件格式，例如CSV

Answer 2

private void writeIssueDataForEachRow(Issue issue, Row row, CellStyle style,
                                          List<ColumnIndex> customFieldDefinitions) {
    Cell cell = row.createCell(0);
    cell.setCellValue(issue.getId()); // 編號
    cell.setCellStyle(style);

    cell = row.createCell(1);
    cell.setCellValue(issue.getSubject()); // 主旨
    cell.setCellStyle(style);

    // substring 的原因是要避開 The maximum length of cell contents (text) is 32,767 characters
    cell = row.createCell(2);
    cell.setCellValue(StringUtils.substring(issue.getDescription(), 0, 32767)); // 敘述
    cell.setCellStyle(style);

}