无法删除文件，因为该文件正在使用中

Question

我将首先发布代码，然后详细说明：

public void createPackage(String uploadedZipLocation) throws BadException, IOException, SAXException {
    String extractedFolderPath = uploadedZipLocation.split("\.zip")[0];
    File tempFolder = null;
    Source xml = null;
    try {
        xml = new StreamSource(extractedFolderPath + "/web.xml");
        validatePkgXml(xml, extractedFolderPath + "/web.xml");
        xml = null; 
    } catch (IOException e) {
        throw e;
    } catch (BadException bpe) {
        xml = null;
        tempFolder = new File(extractedFolderPath);
        FileUtils.deleteDirectory(tempFolder); // **** Can't delete the folder because it is in use.  web.xml is still being read in validatePkgXml I think
        throw bpe;
    }
}

private void validatePkgXml(Source xmlStream, String xmlPath) throws BadException, IOException, SAXException{
    SchemaFactory schemaFactory = SchemaFactory.newInstance(XMLConstants.W3C_XML_SCHEMA_NS_URI);
    Schema schema = schemaFactory.newSchema(new File("/C:/workspacesFresh2/web.xsd"));
    Validator validator = schema.newValidator();
    validator.setErrorHandler(new PackageXMLValidationErrorHandler());
    try {
      validator.validate(xmlStream);
      logger.info(xmlStream.getSystemId() + " is valid");
    } catch (SAXException e) {
      logger.error(xmlStream.getSystemId() + " is NOT valid");
      throw new BadException(xmlPath, e.getLocalizedMessage());
    }
}

我正在尝试获取一个xml文件，并根据xsd模式对其进行验证。如果验证失败，我想删除包含xml文件的文件夹。验证失败时，我无法删除文件夹，因为web.xml仍在使用中。在验证失败后，我尝试将Source设置为null，但web.xml仍在使用中。你知道如何解锁文件以便删除它吗？附带说明：如果验证成功，则删除文件夹也成功。

Answer 1

在删除文件夹之前，您需要关闭InputStream。

我还没有测试过这个代码，但它应该会给你一个想法：

public void createPackage(String uploadedZipLocation) throws BadException, IOException, SAXException {
    String extractedFolderPath = uploadedZipLocation.split("\.zip")[0];
    File tempFolder = null;
    StreamSource xml = null;
    FileInputStream file = null;
    try {
        file = new FileInputStream(extractedFolderPath + "/web.xml");
        xml = new StreamSource(file);
        validatePkgXml(xml, extractedFolderPath + "/web.xml");
        xml.getInputStream().close(); 
        //xml = null; 
    } catch (IOException e) {
        xml.getInputStream().close(); 
        throw e;
    } catch (BadException bpe) {
        //xml = null;
        xml.getInputStream().close(); 
        tempFolder = new File(extractedFolderPath);
        FileUtils.deleteDirectory(tempFolder); // **** Can't delete the folder because it is in use.  web.xml is still being read in validatePkgXml I think
        throw bpe;
    }
}

希望它能起作用！祝你好运

[编辑]顺便说一句，您应该始终关闭Files和Stream以避免内存泄漏，从而导致OutOfMemoryException和ConcurrentModificationException。[/edit]

Answer 2

尝试

public void createPackage(String uploadedZipLocation) throws BadException, IOException, SAXException {
    String extractedFolderPath = uploadedZipLocation.split("\.zip")[0];
    File tempFolder = null;
    FileInputStream file = null;
    Source xml = null;
    try {
        file = new FileInputStream(extractedFolderPath + "/web.xml");
        xml = new StreamSource(file);
        validatePkgXml(xml, extractedFolderPath + "/web.xml");
        xml = null; 
    } catch (IOException e) {
        throw e;
    } catch (BadException bpe) {
        file.close();
        tempFolder = new File(extractedFolderPath);
        FileUtils.deleteDirectory(tempFolder);
        throw bpe;
    }
}