在Windows上使用Xerces 3.0.1和C ++编写XML [英] writing XML with Xerces 3.0.1 and C++ on windows

问题描述

我有以下函数，我写了使用Xerces 3.0.1创建一个XML文件，如果我调用这个函数与一个文件路径foo.xml或../foo.xml，它的工作伟大，但如果我传入c：/foo.xml然后我得到一个异常

i have the following function i wrote to create an XML file using Xerces 3.0.1, if i call this function with a filePath of "foo.xml" or "../foo.xml" it works great, but if i pass in "c:/foo.xml" then i get an exception on this line

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？
多谢。

can someone explain why my code works for relative paths, but not absolute paths please? many thanks.

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("\r\n")); 

    // 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();
}

推荐答案

也许你没有必要的权限？
查看此问题： http://stackoverflow.com/questions/3091484/例外在两行xerces程序

Are you using Windows Vista? perhaps you don't have the necessary permissions? See this question: http://stackoverflow.com/questions/3091484/exception-in-two-line-xerces-program

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