Saxon XML验证：验证失败时无法删除XML文件

Question

几周前，我在此处发布了issue。现在我遇到了另一种情况的类似问题。我创建了一个java上传，我想检查一个XML文件是否格式正确。检查后，我想删除它。但如果转换失败，我不能删除该文件。 我创建了一个更简单的例子，在我的本地计算机上运行它，我遇到了同样的问题。请参阅下面的我的源代码。您可以轻松地复制并粘贴它并自行尝试。

我发现了一个错误，可能是我几周前报告的错误，或者我错过了代码中的某些东西？我使用了Saxon 9.4HE。

public class TestClass 
{ 
public static void main (String[] args) throws Exception 
{ 
    boolean isWellFormed = isXMLwellformed(new File("work/file.xml")); 

    if(isWellFormed) System.out.println("File is well formed"); 
    else 
    { 
     System.out.println("File is not well formed"); 
    } 
    FileUtils.deleteDirectory(new File("work")); 
} 

private static boolean isXMLwellformed(File file) 
{ 
    boolean isWellformed = true; 
    TransformerFactory factory = TransformerFactory.newInstance(); 
    StreamSource source = new StreamSource(file); 
    try 
    { 
     Transformer trans = factory.newTransformer(); 
     SAXResult sink = new SAXResult(new DefaultHandler()); 
     trans.transform(source, sink); 
    } 
    catch (TransformerException err) 
    { 
     System.err.println("Validation failed: " + err.getMessage()); 
     isWellformed = false; 
    } 
    return isWellformed; 
} 
} 

Answer 1

现在，我找到了一个可行的解决方案。如果我自己创建FileReader并将其关闭在catch块中，它就可以工作。但不应该自动关闭？

private static boolean isXMLwellformed(File file) throws IOException 
    { 
    boolean isWellformed = true; 
    BufferedReader br = new BufferedReader(new FileReader(file)); 
    TransformerFactory factory = TransformerFactory.newInstance(); 
    StreamSource source = new StreamSource(br); 
    try 
    { 
     Transformer trans = factory.newTransformer(); 
     SAXResult sink = new SAXResult(new DefaultHandler()); 
     trans.transform(source, sink); 
    } 
    catch (TransformerException err) 
    { 
     System.err.println("Validation failed: " + err.getMessage()); 
     br.close(); 
     isWellformed = false; 
    } 
    return isWellformed; 
    }