Android + POI Excel +在现有文件中添加数据

我想附加在现有的Excel文件中的数据，但没有写入。 我究竟做错了什么？

public static void writeSheet(String data) { HSSFWorkbook workbook; try { String outFileName = "filebook.xls"; File path = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DCIM); File outFile = new File(path, outFileName); workbook = (HSSFWorkbook) WorkbookFactory.create(outFile); Row row = workbook.getSheetAt(0).createRow(0); Cell cell = row.createCell(0); cell.setCellValue("text"); OutputStream outputStream = new FileOutputStream(outFile,true); workbook.write(outputStream); outputStream.close(); workbook.close(); } catch (Exception e) { e.printStackTrace(); } } 

Answer 1

代替

 File outFile = new File(path, outFileName); workbook = (HSSFWorkbook) WorkbookFactory.create(outFile); 

尝试

 FileInputStream outFile = new FileInputStream(new File(path)); workbook = new HSSFWorkbook(outFile); 

所以你的代码

 public static void writeSheet(String data) { HSSFWorkbook workbook; try { String outFileName = "filebook.xls"; File path = Environment.getExternalStoragePublicDirectory(Environment.DIRECTORY_DCIM); FileInputStream file = new FileInputStream(new File(path, outFileName)) workbook = new HSSFWorkbook(file); Row row = workbook.getSheetAt(0).createRow(0); Cell cell = row.createCell(0); cell.setCellValue("text"); file.close(); FileOutputStream outFile =new FileOutputStream(new File(path, outFileName)); workbook.write(outFile); outFile.close(); } catch (Exception e) { e.printStackTrace(); } 

}

Answer 2

如果您正在寻找使用java创buildExcell文件

 File file = new File(filename); WorkbookSettings wbSettings = new WorkbookSettings(); wbSettings.setLocale(new Locale("en", "EN")); WritableWorkbook workbook = Workbook.createWorkbook(file, wbSettings); workbook.createSheet("My_excell_file", 0); WritableSheet excelSheet = workbook.getSheet(0); WritableFont ledgerFont = new WritableFont( WritableFont.createFont("Arial"), WritableFont.DEFAULT_POINT_SIZE, WritableFont.BOLD, false, UnderlineStyle.NO_UNDERLINE, Colour.GRAY_80); Label labelhead1; Label labelhead2; Label labelhead3; private WritableCellFormat headFormat, langFormat; labelhead1 = new Label(0, 1, "KEY", this.headFormat); labelhead2 = new Label(1, 1, "VALUE", this.headFormat); labelhead3 = new Label(2, 1, "PROPERTY", this.headFormat); excelSheet.addCell(labelhead1); excelSheet.addCell(labelhead2); excelSheet.addCell(labelhead3); workbook.write(); workbook.close(); // For Update HSSFRow row; row = sheet.getRow(0); cell = row.getCell(0); cell.setCellValue("Updated Values");