C++ 在 Qt 中解析 XML 文件
声明：本页面是StackOverFlow热门问题的中英对照翻译，遵循CC BY-SA 4.0协议，如果您需要使用它，必须同样遵循CC BY-SA许可，注明原文地址和作者信息，同时你必须将它归于原作者（不是我）：StackOverFlow
原文地址: http://stackoverflow.com/questions/3092387/
Warning: these are provided under cc-by-sa 4.0 license. You are free to use/share it, But you must attribute it to the original authors (not me):
StackOverFlow
提示：将鼠标放在中文语句上可以显示对应的英文。显示中英文
时间：2020-08-28 12:02:05 来源:igfitidea点击:
Parse a XML file in Qt
提问by stefan
Let's say I have an XML file like this:
假设我有一个这样的 XML 文件：
<?xml version="1.0" encoding="utf-8"?>
<name>
<id>1</id>
</name>
How can I parse it and get the value of id?
我如何解析它并获得 的值id？
std::string id = ...;
回答by Scrivener
Something like this will work:
像这样的事情会起作用：
xmlFile = new QFile("xmlFile.xml");
if (!xmlFile->open(QIODevice::ReadOnly | QIODevice::Text)) {
QMessageBox::critical(this,"Load XML File Problem",
"Couldn't open xmlfile.xml to load settings for download",
QMessageBox::Ok);
return;
}
xmlReader = new QXmlStreamReader(xmlFile);
//Parse the XML until we reach end of it
while(!xmlReader->atEnd() && !xmlReader->hasError()) {
// Read next element
QXmlStreamReader::TokenType token = xmlReader->readNext();
//If token is just StartDocument - go to next
if(token == QXmlStreamReader::StartDocument) {
continue;
}
//If token is StartElement - read it
if(token == QXmlStreamReader::StartElement) {
if(xmlReader->name() == "name") {
continue;
}
if(xmlReader->name() == "id") {
qDebug() << xmlReader->readElementText();
}
}
}
if(xmlReader->hasError()) {
QMessageBox::critical(this,
"xmlFile.xml Parse Error",xmlReader->errorString(),
QMessageBox::Ok);
return;
}
//close reader and flush file
xmlReader->clear();
xmlFile->close();
回答by sashoalm
I made a simplified version of @Scrivener's answer. Instead of reading from a file I just read from a QString variable and I removed the continue;blocks:
我制作了@Scrivener 答案的简化版本。我没有从文件中读取，而是从 QString 变量中读取，然后删除了continue;块：
QString xml = "<?xml version=\"1.0\" encoding=\"utf-8\"?>\n"
"<name>\n"
" <id>1</id>\n"
"</name>\n";
QXmlStreamReader reader(xml);
while(!reader.atEnd() && !reader.hasError()) {
if(reader.readNext() == QXmlStreamReader::StartElement && reader.name() == "id") {
qDebug() << reader.readElementText();
}
}
