一 环境部署

QT的配置文件中添加xml选项：

 二 写入xml文件

头文件：#include <QXmlStreamWriter>

bool MyXML::writeToXMLFile()
{
    QString currentTime = QDateTime::currentDateTime().toString("yyyyMMddhhmmss");
    QString fileName = "./testWrite.xml";
    QFile file(fileName);
    //QIODevice::Truncate 以重写的方式打开，在写入新的数据时会将原有数据全部清除
    if(!file.open(QIODevice::WriteOnly | QIODevice::Text |QIODevice::Truncate)){
        qDebug()<<"open xml file failed!";
        return false;
    }


    QXmlStreamWriter write(&file);
    //设置自动格式化，包括自动换行缩进等
    write.setAutoFormatting(true);
    write.writeStartDocument("1.0");

    //写入常规信息
    write.writeStartElement("Somebody info");
    write.writeTextElement("name","abby");
    write.writeTextElement("age",QString::number(18));
    write.writeTextElement("sex","女");

    //写入数组
    for(int i = 0; i < 2; i++){
        write.writeStartElement("hobby");
        write.writeAttribute("No",QString::number(i));
        write.writeTextElement("name",QString("piano").append(QString::number(i)));
        write.writeEndElement();
    }
    write.writeEndElement();

    write.writeEndDocument();
    file.close();
    return true;
}

写入的文件如图：

 

三 解析xml文件

头文件：#include <QXmlStreamReader>