我需要从 Excel 文档创建信息,我使用 Java 和 Apache POI。这是我的代码:
//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 文件为空(文件大小 = 0 KB),并且 Excel 表示该文件已损坏或损坏。我想我的输出流和写入做得不好,但不知道如何修复它。
无法编译的源代码:您定义了变量out inside 试着抓范围,然后你在另一个范围内使用它试着抓.
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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