java - 来自 Apache POI 的文件 Excel 无法由 Ms Excel 打开(损坏)

Question

不知道为什么我用POI写的文件用Ms Excel 2013打不开，但是POI还是可以读取的。 (单元格值可以更改)

this是来自文件的错误

这是代码

FileInputStream fis = null;
    try {
        fis = new FileInputStream(fileUri); //not error at fileUri
    } catch (FileNotFoundException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }
    String urii = fileUri.replace(".xls", "0.xls"); //not error
    File fisx = new File(urii);

    Workbook workbook = null;
        workbook = new HSSFWorkbook(fis);

    Sheet sheet = workbook.getSheetAt(0);

    Row row = sheet.getRow(0);

    Cell cell = row.getCell(0);

    String p = cell.getStringCellValue();

    TextView a = (TextView) findViewById(R.id.txtUri);

    cell.setCellValue(new String("popo"));
    String x = cell.getStringCellValue();

    TextView b = (TextView) findViewById(R.id.txtFile);

    a.setText(p);
    b.setText(x);

    OutputStream fos = null;

    fos = new FileOutputStream(fisx);
    workbook.write(fos); //main problem
    fos.flush();
    fos.close();

感谢您的帮助!

Answer 1

您的代码有两个问题。首先是:

FileInputStream fis = null;
try {
    fis = new FileInputStream(fileUri);

如 Apache POI Docs, don't use an InputStream if you have a File! 中所述

其次，这个:

 Workbook workbook = null;
 workbook = new HSSFWorkbook(fis);

这仅适用于 .xls 文件，不适用于 .xlsx 文件。相反，您需要使用 WorkbookFactory它标识类型并为您提供适合该格式的正确工作簿

所以，把你的代码改成

File file = new File(fileUri);
Workbook workbook = WorkbookFactory.create(file);