在Windows上用Xerces 3.0.1和C编写XML

XMLFormatTarget *formatTarget = new LocalFileFormatTarget(targetPath);

有人可以解释为什么我的代码适用于相对路径,但不是绝对路径吗？
非常感谢.

const int ABSOLUTE_PATH_FILENAME_PREFIX_SIZE = 9;

void OutputXML(xercesc::DOMDocument* pmyDOMDocument,std::string filePath)
{
    //Return the first registered implementation that has the desired features. In this case,we are after a DOM implementation that has the LS feature... or Load/Save.
    DOMImplementation *implementation = DOMImplementationRegistry::getDOMImplementation(L"LS");

    // Create a DOMLSSerializer which is used to serialize a DOM tree into an XML document.
    DOMLSSerializer *serializer = ((DOMImplementationLS*)implementation)->createLSSerializer();

    // Make the output more human readable by inserting line feeds.
    if (serializer->getDomConfig()->canSetParameter(XMLUni::fgDOMWRTFormatPrettyPrint,true))
        serializer->getDomConfig()->setParameter(XMLUni::fgDOMWRTFormatPrettyPrint,true);

    // The end-of-line sequence of characters to be used in the XML being written out. 
    serializer->setNewLine(XMLString::transcode("rn")); 

    // Convert the path into Xerces compatible XMLCh*.
    XMLCh *tempFilePath = XMLString::transcode(filePath.c_str());

    // Calculate the length of the string.
    const int pathLen = XMLString::stringLen(tempFilePath);

    // Allocate memory for a Xerces string sufficent to hold the path.
    XMLCh *targetPath = (XMLCh*)XMLPlatformUtils::fgMemoryManager->allocate((pathLen + ABSOLUTE_PATH_FILENAME_PREFIX_SIZE) * sizeof(XMLCh));

    // Fixes a platform dependent absolute path filename to standard URI form.
    XMLString::fixURI(tempFilePath,targetPath);

    // Specify the target for the XML output.
    XMLFormatTarget *formatTarget = new LocalFileFormatTarget(targetPath);
    //XMLFormatTarget *myFormTarget = new StdOutFormatTarget();

    // Create a new empty output destination object.
    DOMLSOutput *output = ((DOMImplementationLS*)implementation)->createLSOutput();

    // Set the stream to our target.
    output->setByteStream(formatTarget);

    // Write the serialized output to the destination.
    serializer->write(pmyDOMDocument,output);

    // Cleanup.
    serializer->release();
    XMLString::release(&tempFilePath);
    delete formatTarget;
    output->release();
}