用C++保存QTreeWidget到xml，再读取xml显示为QTreeWidget

以下是一个示例代码，可以将QTreeWidget保存为XML文件，并从XML文件中读取并显示为QTreeWidget： #include <QtWidgets> #include <QtXml> QDomElement widgetToDomXml(QTreeWidgetItem *item, QDomDocument &doc) QDomElement element = doc.createElement(item->text(0)); for(int i=0; i<item->childCount(); i++) { QTreeWidgetItem *child = item->child(i); element.appendChild(widgetToDomXml(child, doc)); return element; void widgetFromDomXml(QTreeWidgetItem *parent, QDomElement &element) QTreeWidgetItem *item = new QTreeWidgetItem(parent); item->setText(0, element.tagName()); QDomNodeList children = element.childNodes(); for(int i=0; i<children.count(); i++) { QDomNode childNode = children.item(i); if(childNode.isElement()) { QDomElement childElement = childNode.toElement(); widgetFromDomXml(item, childElement); bool saveTreeWidgetToXml(const QTreeWidget *treeWidget, const QString &fileName) QFile file(fileName); if(!file.open(QIODevice::WriteOnly)) { return false; QDomDocument doc; QDomElement root = doc.createElement("TreeWidget"); doc.appendChild(root); for(int i=0; i<treeWidget->topLevelItemCount(); i++) { QTreeWidgetItem *item = treeWidget->topLevelItem(i); root.appendChild(widgetToDomXml(item, doc)); QTextStream stream(&file); stream << doc.toString(); file.close(); return true; bool loadTreeWidgetFromXml(QTreeWidget *treeWidget, const QString &fileName) QFile file(fileName); if(!file.open(QIODevice::ReadOnly)) { return false; QDomDocument doc; if(!doc.setContent(&file)) { file.close(); return false; file.close(); QDomElement root = doc.documentElement(); for(int i=0; i<root.childNodes().count(); i++) { QDomNode childNode = root.childNodes().item(i); if(childNode.isElement()) { QDomElement childElement = childNode.toElement(); widgetFromDomXml(treeWidget->invisibleRootItem(), childElement); return true; ```