保存 Excel 文档 Apache POI [英] Save Excel document Apache POI

问题描述

我需要从 excel 文档创建通知，我使用的是 Java 和 Apache POI.这是我的代码:

I need to create informs from an excel document, I'm using Java and Apache POI. Here is my code:

    //Get path with JFileChooser
    public static String LeeRuta(){
        JFileChooser chooser = new JFileChooser();
        chooser.setFileSelectionMode(JFileChooser.FILES_AND_DIRECTORIES);
        chooser.showDialog(chooser, "Seleccionar");
        File f =chooser.getSelectedFile();
        File camino = f.getAbsoluteFile();
        String ruta = camino.getAbsolutePath();
        return ruta;
    }

  //main
  public static void main(String args[]) {
    String ruta=LeeRuta();

    /* Don't know if neccesary, but it didn't works with or without it
    InputStream inp;
    try {
        inp = new FileInputStream(ruta);
    } catch (FileNotFoundException ex) {
        Logger.getLogger(PruebaExcel.class.getName()).log(Level.SEVERE, null, ex);
    }
    */

    Workbook exceldoc = null;

    // Opening file
      try {
         exceldoc = WorkbookFactory.create(new File(ruta));
        //wb = WorkbookFactory.create(new File(ruta));
    } catch (InvalidFormatException | IOException e) {
        e.printStackTrace();
    }


    //Selecting the sheet
    String nombredoc = exceldoc.getSheetName(0);
    Sheet hoja = exceldoc.getSheet(nombredoc);


        //Selecting the cell
        Cell celda = hoja.getRow(1).getCell(1);
//        System.out.println(celda);
        System.out.println(hoja.getRow(2).getCell(3));

        //Variables
        int anyo = 2014;
        String ota = "OTa 158";

        //Setting Cells value
        hoja.getRow(2).getCell(4).setCellValue(anyo);
        hoja.getRow(2).getCell(5).setCellValue(ota);

       //If I print here cell values, I see that values has been set.

        //Saving
        try {
            //hoja.getRow(3).getCell(4).setCellValue(fecha);
            FileOutputStream out = new FileOutputStream("C:\\Documents and Settings\\INGENIERIA2\\Mis documentos\\Informe.xls");
        } catch (FileNotFoundException ex) {
            Logger.getLogger(PruebaExcel.class.getName()).log(Level.SEVERE, null, ex);
        }
        try {
            exceldoc.write(out);
        } catch (IOException ex) {
            Logger.getLogger(PruebaExcel.class.getName()).log(Level.SEVERE, null, ex);
        }
    }

问题是 Informe.xls 文件是空的(文件大小 = 0 KB)并且 Excel 说它已损坏或损坏.我想我在输出流和写入方面做得不好，但不知道如何解决.

The problem is that Informe.xls file is empty (file size = 0 KB) and Excel says its corrupted or damaged. I suppose I'm not doing well the output stream and the write, but don't know how to fix it.

推荐答案

不可编译的源代码:你在 try-catch 范围内定义变量 out 然后你在里面使用它另一个try-catch.

Uncompilable source code: you define variable out inside try-catch scope and then you use it inside another try-catch.

试试这个代码:

try {
    FileOutputStream out = new FileOutputStream("C:\\Documents and Settings\\INGENIERIA2\\Mis documentos\\Informe.xls");
    exceldoc.write(out);
    out.close();
} catch (FileNotFoundException ex) {
    Logger.getLogger(PruebaExcel.class.getName()).log(Level.SEVERE, null, ex);
}

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