Question

我正在做一些编写Excel文件的代码。但是，当打开在main函数末尾创建的文件时，Open Office会显示一条错误消息，指出该文件已被未知用户锁定。我检查了，似乎我正在使用该文件关闭对文件和工作簿的所有引用。

提前感谢您的帮助！

代码

public class StandingsFile
{
    private Workbook workbook;

    public StandingsFile(InputStream inputStream, File outputFile)
    {
        this.outputFile = outputFile;
        workbook = POIExcelFileProcessor.createWorkbook(inputStream);
    }

    public void write()
    {
        // Code where the sheets in the Excel file are modified

        POIExcelFileProcessor.writeWorkbook(workbook, outputFile);
    }

    public static void main(String[] args)
    {
        standingsExcelFile = new StandingsFile(StandingsCreationHelper.class.getResourceAsStream(TEMPLATE_FILENAME), outputFile);
        standingsExcelFile.write();

        try
        {
            Desktop dt = Desktop.getDesktop();
            dt.open(outputFile);
        }
        catch (Exception ex)
        {
            e.printStackTrace();
        }
    }
}

public class POIExcelFileProcessor
{

    public static Workbook createWorkbook(InputStream inputStream)
    {
        Workbook workbook = null;

        try
        {
            workbook = WorkbookFactory.create(inputStream);
        }
        catch (Exception e)
        {
            e.printStackTrace();
        }

        return workbook;
    }

    public static void writeWorkbook(Workbook workbook, File outputFile)
    {
        try
        {
            FileOutputStream fileOut = new FileOutputStream(outputFile);
            workbook.write(fileOut);

            fileOut.flush();
            workbook.close();
        }
        catch (Exception e)
        {
            e.printStackTrace();
        }
    }

Answer 1

您需要记住在使用close方法（在finally块中）或使用try-with-resources语句明确地使用它时关闭文件

这是一般规则，不仅仅是使用POI。

文件已锁定以进行编辑

1 个答案: