Java中的关闭图像生成器

我正在执行的步骤

我正在从html（xhtml）创建一个图像

在JSF页面上显示图像

删除（生成的）图像和html（xhtml）->问题就出在这里

步骤1的代码：

private void generateImageFromHtml(String imageName) {

    try {
        String cardPath = Constants.MEMBERSHIP_TEMPLATE_CARD_DIR;
        // This is path to html and image

        File file = new File(cardPath + imageName + ".xhtml");
        int width = 600;
        int height = 380;

        Java2DRenderer renderer = new Java2DRenderer(file, width, height);
        BufferedImage img = renderer.getImage();
        FSImageWriter imageWriter = new FSImageWriter();
        imageWriter.write(img, (cardPath + imageName + ".png"));
        img.flush();

    } catch (IOException exception) {}
}

<img src="#{facesContext.externalContext.requestContextPath}/assets/images/cards/#{myBean.cardName}.png" />

public void deleteMembershipCard() {

    // Here are above code to popupate html and image paths

    File card = new File(imagePath);
    File xhtml = new File(xhtmlPath);

    try {
        card.delete(); // Not DONE Successfully
        xhtml.delete(); // DONE Successfully
    } catch(SecurityException se) {}
}

步骤2的代码：

private void generateImageFromHtml(String imageName) {

    try {
        String cardPath = Constants.MEMBERSHIP_TEMPLATE_CARD_DIR;
        // This is path to html and image

        File file = new File(cardPath + imageName + ".xhtml");
        int width = 600;
        int height = 380;

        Java2DRenderer renderer = new Java2DRenderer(file, width, height);
        BufferedImage img = renderer.getImage();
        FSImageWriter imageWriter = new FSImageWriter();
        imageWriter.write(img, (cardPath + imageName + ".png"));
        img.flush();

    } catch (IOException exception) {}
}

<img src="#{facesContext.externalContext.requestContextPath}/assets/images/cards/#{myBean.cardName}.png" />

public void deleteMembershipCard() {

    // Here are above code to popupate html and image paths

    File card = new File(imagePath);
    File xhtml = new File(xhtmlPath);

    try {
        card.delete(); // Not DONE Successfully
        xhtml.delete(); // DONE Successfully
    } catch(SecurityException se) {}
}

问题：我无法删除图像，但html文件已成功删除。当我试图手动删除图像时，它会给我一条错误消息说“无法删除它，它是用Java（TM）打开的”

---

不知道图像在Java中打开的位置。

@Karthigeyan我想知道图像在哪里（Java代码中）打开。我不想手动删除它。