我有使用Apache POI库(我使用旧的Excel文件的HSSF前缀类)导出/导入excel文件(.xls)的java程序。
Java POI输出时忽略导出到空行的excel
我的Excel格式是:
第1行:标题
第2行:空
第3行:表与报头和内容
比方说我的表有5行,包括头,因此,总共7排。 我正在将数据导出到excel文件,文件大小为6k。 没有改变文件中的任何东西我正在导入它,并在调试导入时,我意识到我的行数是6!这意味着它由于某种原因忽略了空行,这是我不明白的。
接下来的情况下,我导出文件打开它与MS Excel保存它,文件大小更改为24K。 我执行导入,它的工作原理,行的总大小再次是7。
出口和进口的代码开始低于:
public static TempFile createExcelFile(String sheetTitle, String title, String headerSummary, List<String> header, List<LinkedHashMap<String, String>> data)
{
TempFile result = new TempFile(FileKeyFactory.getFileKey(ExcelReporter.class).getFullPathKey());
HSSFWorkbook wb = new HSSFWorkbook();
HSSFSheet spreadSheet;
DataFormat format = null;
int rowIndex = 0;
// Get a DataFormat object and use it to create a CellStyle object
// with the following format set for the cells @. The @ or ampersand
// sets the format so that the cell will hold text.
format = wb.createDataFormat();
if (sheetTitle != null)
{
spreadSheet = wb.createSheet(sheetTitle);
}
else
{
spreadSheet = wb.createSheet();
}
if (title != null)
{
// Title
HSSFFont titleFont = wb.createFont();
titleFont.setFontHeightInPoints((short) 14);
titleFont.setItalic(true);
HSSFRow titleRow = spreadSheet.createRow(rowIndex++);
HSSFCell cell = titleRow.createCell(0);
cell.setCellValue(title);
cell.getCellStyle().setFont(titleFont);
spreadSheet.addMergedRegion(new CellRangeAddress(0, 0, 0, 100));
}
else
{
spreadSheet = wb.createSheet();
}
HSSFCellStyle style = wb.createCellStyle();
style.setDataFormat(format.getFormat("@"));
if (headerSummary != null)
{
HSSFFont headerFont = wb.createFont();
headerFont.setFontHeightInPoints((short) 9);
headerFont.setItalic(false);
HSSFCellStyle headerCellStyle = wb.createCellStyle();
headerCellStyle.setDataFormat(format.getFormat("@"));
headerCellStyle.setFont(headerFont);
headerCellStyle.setWrapText(true);
HSSFRow headerRow = spreadSheet.createRow(rowIndex++);
HSSFCell headerCell = headerRow.createCell(0);
headerCell.setCellValue(headerSummary);
headerCell.setCellStyle(headerCellStyle);
//increase row height to accommodate two lines of text
headerRow.setHeightInPoints((9 * spreadSheet.getDefaultRowHeightInPoints()));
//adjust column width to fit the content
spreadSheet.autoSizeColumn((short) 1);
spreadSheet.addMergedRegion(new CellRangeAddress(1, 1, 0, 100));
}
/*
* Data table header
*/
HSSFRow dateRow = spreadSheet.createRow(rowIndex++);
Calendar calendar = Calendar.getInstance();
HSSFCreationHelper createHelper = wb.getCreationHelper();
CellStyle cellStyle = wb.createCellStyle();
cellStyle.setDataFormat(createHelper.createDataFormat().getFormat("m/d/yy h:mm"));
HSSFCell cell = dateRow.createCell(0);
cell.setCellValue("Created: " + DateParser.toString(calendar, DateParser.MONTH_WORD_DATE_FORMAT));
cell.setCellStyle(cellStyle);
HSSFFont headerTableFont = wb.createFont();
headerTableFont.setFontHeightInPoints((short) 10);
headerTableFont.setColor(IndexedColors.WHITE.getIndex());
HSSFCellStyle tableHeaderStyle = wb.createCellStyle();
tableHeaderStyle.setDataFormat(format.getFormat("@"));
tableHeaderStyle.setBorderRight(HSSFCellStyle.BORDER_MEDIUM);
tableHeaderStyle.setBorderTop(HSSFCellStyle.BORDER_MEDIUM);
tableHeaderStyle.setBorderLeft(HSSFCellStyle.BORDER_MEDIUM);
tableHeaderStyle.setBorderBottom(HSSFCellStyle.BORDER_MEDIUM);
tableHeaderStyle.setFillForegroundColor(HSSFColor.LIGHT_BLUE.index);
tableHeaderStyle.setFont(headerTableFont);
tableHeaderStyle.setFillPattern(CellStyle.SOLID_FOREGROUND);
HSSFRow tableHeaderRowRow = spreadSheet.createRow(rowIndex++);
for (int i = 0; i < header.size(); i++)
{
HSSFCell ipHeaderCell = tableHeaderRowRow.createCell(i);
ipHeaderCell.setCellStyle(tableHeaderStyle);
ipHeaderCell.setCellValue(header.get(i));
spreadSheet.autoSizeColumn(i);
}
/*
* ********************** DATA *******************
*/
HSSFCellStyle dataCellStyle = wb.createCellStyle();
dataCellStyle.setDataFormat(format.getFormat("@"));
dataCellStyle.setBorderRight(HSSFCellStyle.BORDER_THIN);
dataCellStyle.setBorderTop(HSSFCellStyle.BORDER_THIN);
dataCellStyle.setBorderLeft(HSSFCellStyle.BORDER_THIN);
dataCellStyle.setBorderBottom(HSSFCellStyle.BORDER_THIN);
//spreadSheet.createRow(rowIndex++);
for (LinkedHashMap<String, String> row : data)
{
HSSFRow currentRow = spreadSheet.createRow(rowIndex++);
for (int i = 0; i < header.size(); i++)
{
HSSFCell dataCell = currentRow.createCell(i);
dataCell.setCellStyle(dataCellStyle);
dataCell.setCellType(Cell.CELL_TYPE_STRING);
String celVal = row.get(header.get(i));
dataCell.setCellValue(celVal);
}
}
// Resize columns automatically.
for (int i = 0; i < header.size(); i++)
{
spreadSheet.setDefaultColumnStyle(i, style);
spreadSheet.autoSizeColumn(i);
}
FileOutputStream resultOutStream = null;
try
{
resultOutStream = new FileOutputStream(result);
wb.write(resultOutStream);
resultOutStream.flush();
}
catch (Exception e)
{
Logger.ERROR("File path: " + result.getAbsolutePath() + File.separator + result.getName(), e);
throw new RuntimeException("File path: " + result.getAbsolutePath() + File.separator + result.getName(), e);
}
finally
{
try
{
if (resultOutStream != null)
{
resultOutStream.close();
}
}
catch (Exception ignore)
{
}
}
return result;
}
public void import()
{
...
InputStream input = new BufferedInputStream(new FileInputStream(file));
POIFSFileSystem fs = new POIFSFileSystem(input);
HSSFWorkbook wb = new HSSFWorkbook(fs);
HSSFSheet sheet = wb.getSheetAt(0);
Iterator rows = sheet.rowIterator();
rows.next(); // skip title
rows.next(); // skip empty row
List<String> header = getLine((HSSFRow) rows.next());
...
}
private List<String> getLine(HSSFRow row)
{
List<String> header = new ArrayList<String>();
Iterator<Cell> cellIterator = row.cellIterator();
while(cellIterator.hasNext())
{
HSSFCell cell = (HSSFCell)cellIterator.next();
cell.setCellType(Cell.CELL_TYPE_STRING);
header.add(cell.toString());
}
return header;
}
任何想法,为什么出口和进口之后再空行同时呼吁sheet.rowIterator忽略()?
的预期和记录行为,这很有趣,虽然我宁愿不限制表格到硬编码的最小/最大行。 – Snow 2014-09-14 14:37:36
我检查了你的代码。我不需要最小/最大值,因为我知道我总是从零开始,而我只需要最后一行,它适用于我。谢谢。 – Snow 2014-09-14 14:48:45