java.nio.file.FileSystemException 移动文件时

Question

我正在尝试使用 pdf-renderer 从 pdf 文件的最后一页创建图像。没问题。但是创建图像后，我想将原始pdf文件移动到新文件夹，但总是失败。

java.nio.file.FileSystemException: D:\test.pdf -> D:\folder\test.pdf: The process cannot access the file because it is being used by another process.

这是我的示例代码:

    private String convertPDFtoImage(String myFile, String lokasiAwal, String lokasiBaru) {
    try {
        File pdfFile = new File(myFile);
        RandomAccessFile raf = new RandomAccessFile(pdfFile, "r");
        FileChannel channel = raf.getChannel();
        ByteBuffer buf = channel.map(FileChannel.MapMode.READ_ONLY, 0, channel.size());
        PDFFile pdf = new PDFFile(buf);
        Integer lastPage = pdf.getNumPages();
        PDFPage page = pdf.getPage(lastPage);
        Rectangle rect = new Rectangle(0, 0, (int) page.getBBox().getWidth(), (int) page.getBBox().getHeight());
        int width = rect.width;
        int height = rect.height;
        BufferedImage bufferedImage = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
        Image image = page.getImage(width, height, rect, null, true, true);
        Graphics2D bufImageGraphics = bufferedImage.createGraphics();
        bufImageGraphics.drawImage(image, 0, 0, null);
        String newImage = System.getProperty("user.home")+"/images/test.png";
        BufferedImage dest = bufferedImage.getSubimage(0, 0, width, height);
        ImageIO.write(dest, "png", new File(newImage));
        raf.close();
        Files.move(Paths.get(lokasiAwal), Paths.get(lokasiBaru));
        return newImage;
    } catch (IOException e) {
        e.printStackTrace();
        return "error";
    }
}

我认为这是因为该文件仍在被我的应用程序使用。我已经尝试过 raf.close() 或 channel.close() 或两者，但没有运气。我不知道是什么锁定了我的文件。我该如何修复它？

Answer 1

您可以尝试在 ConvertPDFtoImage 方法之外进行移动吗？这样它应该更干净，因为 raf、channel 都是该方法的本地函数。