java.io.FileNotFoundException：由Reading + Writing引起

Question

我正在尝试读取XML文件并重新编写它：

try {

        DocumentBuilderFactory docFactory = DocumentBuilderFactory.newInstance();
        DocumentBuilder docBuilder = docFactory.newDocumentBuilder();
         FileInputStream inputstream = new FileInputStream(dat3);  
        Document doc = docBuilder.parse(inputstream);

        TransformerFactory transformerFactory = TransformerFactory.newInstance();
        Transformer transformer = transformerFactory.newTransformer();
        transformer.setOutputProperty(OutputKeys.INDENT, "yes");
        DOMSource source = new DOMSource(doc);
        StreamResult result = new StreamResult(new File(dat3).getAbsolutePath());
        transformer.transform(source, result);

       } catch (ParserConfigurationException pce) {
        pce.printStackTrace();
       } catch (TransformerException tfe) {
        tfe.printStackTrace();
       } catch (IOException ioe) {
        ioe.printStackTrace();
       } catch (SAXException sae) {
        sae.printStackTrace();
       }

但它似乎不起作用，因为我认为写作和阅读存在冲突：

transformer.transform（source，result）; 删除结果java.io.FileNotFoundException：拒绝访问

Answer 1

您的代码正常运行。我试试这个样本。

public class Tester {

private static String dat3 = "data/xml";

public static void main(String[] args) {

    try {

        DocumentBuilderFactory docFactory = DocumentBuilderFactory
                .newInstance();
        DocumentBuilder docBuilder = docFactory.newDocumentBuilder();
        FileInputStream inputstream = new FileInputStream(dat3);
        Document doc = docBuilder.parse(inputstream);

        TransformerFactory transformerFactory = TransformerFactory
                .newInstance();
        Transformer transformer = transformerFactory.newTransformer();
        transformer.setOutputProperty(OutputKeys.INDENT, "yes");
        DOMSource source = new DOMSource(doc);
        StreamResult result = new StreamResult(
                new File(dat3).getAbsolutePath());
        transformer.transform(source, result);

    } catch (ParserConfigurationException pce) {
        pce.printStackTrace();
    } catch (TransformerException tfe) {
        tfe.printStackTrace();
    } catch (IOException ioe) {
        ioe.printStackTrace();
    } catch (SAXException sae) {
        sae.printStackTrace();
    }

}

}

查看dat3文件权限。