Java 无法删除文件，因为它正在使用中

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());
    }
}

---

我试图获取一个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，我无法删除该文件夹，因为

web.xml

仍在使用中。验证失败后，我尝试将

源代码设置为
null
，但
web.xml
仍在使用。你知道如何解锁该文件以便我可以删除它吗？旁注：如果验证成功，则删除文件夹也会成功。
您需要在删除文件夹之前关闭InputStream

我还没有测试过这段代码，但它应该能让您了解：

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，您应该始终关闭文件和流以避免内存泄漏，从而导致OutOfMemoryException和ConcurrentModificationException。
[/edit]
删除文件夹之前，需要关闭InputStream

我还没有测试过这段代码，但它应该能让您了解：

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，您应该始终关闭文件和流以避免内存泄漏，从而导致OutOfMemoryException和ConcurrentModificationException。
[/edit]
试试看

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;
    }
}

试一试

我找不到
getInputStream（）
方法。我需要使用
StreamSource
而不仅仅是
Source
来获得该方法。^^true，我在示例代码中更正了它。正在工作吗？可能我们现在可以直接关闭FileInputStream，而不是在StreamSource上使用getINputStream方法。是的，我刚才看到了编辑。这似乎非常重要。谢谢你的帮助。它现在工作得很好！我找不到
getInputStream（）
方法。我需要使用
StreamSource
而不仅仅是
Source
来获得该方法。^^true，我在示例代码中更正了它。正在工作吗？可能我们现在可以直接关闭FileInputStream，而不是在StreamSource上使用getINputStream方法。是的，我刚才看到了编辑。这似乎非常重要。谢谢你的帮助。它现在工作得很好！使用
File
作为
newstreamsource（File…
的参数有助于解决我的问题！感谢使用
文件
作为
新StreamSource（文件…
的参数帮助解决了我的问题！谢谢