Qt：如何使用QtXmlstreamreader从xml文件读取数组数据字符串

我正在尝试将所有xml数据加载到QList中。 我不确定从xml获取所有数据的编码是否正确

当我试图运行它时，xml中的一些信息在输出中丢失了

以下是xml元素：

1.
6.
2.
5.
3.
5.
4.
2.
5.
4.
6.
8.
7.
8.
8.
8.
9
8.
10
8.
11
2.
23
2.
112
8.
20A
2.
40A
4.
15C
4.

以下是代码：

检测变量h

---

基于下一个示例：我实现了以下解决方案：

类CANListParser{ 公众： 静态QList parserXML（QIODevice*设备）{ QList can_标识； QString系统； QXmlStreamReader； setDevice（设备）； 而（！xmlReader.atEnd（）&&！xmlReader.hasrerror（））{ QXmlStreamReader:：TokenType token=xmlReader.readNext（）； if（令牌==QXmlStreamReader:：StartDocument）{ 继续； } if（令牌==QXmlStreamReader:：StartElement）{ if（xmlReader.name（）=“CANBUS”） 继续； if（xmlReader.name（）=“系统”）{ system=xmlReader.attributes（）.value（“ID”）.toString（）； 继续； } if（xmlReader.name（）=“CAN”）{ CANList c=parseCANList（系统，xmlReader）；

---

我能找到解决这个问题的办法吗。 显然这是while循环的问题

解决办法如下：

void DetectionVar::ReadXML()
{
    filename = QCoreApplication::applicationDirPath() + "/" + "CANBus_Data.xml";
    qDebug() << filename;
    QFile f(filename);
    if (!f.open(QIODevice::ReadOnly | QIODevice::Text))
    {
        qDebug() << "Cannot read file" << f.errorString();
        return;
    }

    xmlReader.setDevice(&f);

    while(!xmlReader.atEnd())
    {
        xmlReader.readNext();

        if (xmlReader.isStartElement())
        {
            if (xmlReader.name() == "CANBUS")
            {

                while(xmlReader.readNextStartElement())
                {
                    if (xmlReader.name()== "SYSTEM" && xmlReader.attributes().hasAttribute("ID"))
                    {
                        DataCAN.System = xmlReader.attributes().value("ID").toString();

                        while(xmlReader.readNextStartElement())
                        {
                            if (xmlReader.name()== "CAN" && xmlReader.attributes().hasAttribute("ID"))
                            {
                                DataCAN.CAN_ident = xmlReader.attributes().value("ID").toString();

                                while(xmlReader.readNextStartElement())
                                {
                                   if (xmlReader.name()== "ID")
                                   {
                                       DataCAN.ID = xmlReader.readElementText();
                                   }

                                   else if (xmlReader.name()== "Length")
                                   {
                                       DataCAN.Length = xmlReader.readElementText();
                                   }
                                }

                                can_identity.append(DataCAN);
                            }

                        }

                    }

                }
            }
        }
    }

    if (xmlReader.hasError())
    {
        qDebug() << "XML Error: " << xmlReader.errorString().data();
    }

    f.close();


    for (int i = 0; i <can_identity.length(); i++ )
    {
        qDebug()<< "System: " + can_identity.at(i).System;
        qDebug()<< "Ident: " + can_identity.at(i).CAN_ident;
        qDebug()<< "ID: " + can_identity.at(i).ID;
        qDebug()<< "Length: " + can_identity.at(i).Length;
    }

}

void DetectionVar:：ReadXML（）
{
filename=QCoreApplication:：applicationDirPath（）+“/”+“CANBus_Data.xml”；
qDebug（）
void DetectionVar::ReadXML()
{
    filename = QCoreApplication::applicationDirPath() + "/" + "CANBus_Data.xml";
    qDebug() << filename;
    QFile f(filename);
    if (!f.open(QIODevice::ReadOnly | QIODevice::Text))
    {
        qDebug() << "Cannot read file" << f.errorString();
        return;
    }

    xmlReader.setDevice(&f);

    while(!xmlReader.atEnd())
    {
        xmlReader.readNext();

        if (xmlReader.isStartElement())
        {
            if (xmlReader.name() == "CANBUS")
            {
                while(xmlReader.readNextStartElement())
                {
                    if (xmlReader.name()== "SYSTEM" && xmlReader.attributes().hasAttribute("ID"))
                    {
                        DataCAN.System = xmlReader.attributes().value("ID").toString();
                    }
                    else if (xmlReader.name()== "CAN" && xmlReader.attributes().hasAttribute("ID"))
                    {
                        DataCAN.CAN_ident = xmlReader.attributes().value("ID").toString();
                    }
                    else if (xmlReader.name()== "ID")
                    {
                        DataCAN.ID = xmlReader.readElementText();
                    }
                    else if (xmlReader.name()== "Length")
                    {
                        DataCAN.Length = xmlReader.readElementText();
                    }

                    can_identity.append(DataCAN);
                }
            }
        }
    }

    f.close();


    for (int i = 0; i <can_identity.length(); i++ )
    {
        qDebug()<< "System: " + can_identity.at(i).System;
        qDebug()<< "Ident: " + can_identity.at(i).CAN_ident;
        qDebug()<< "ID: " + can_identity.at(i).ID;
        qDebug()<< "Length: " + can_identity.at(i).Length;
    }

}

"System: PCU"
"Ident: "
"ID: "
"Length: "
"System: PCU"
"Ident: veh Ops Status Lights"
"ID: "
"Length: "
"System: PCU"
"Ident: veh Ops Status Lights"
"ID: 1"
"Length: "
"System: PCU"
"Ident: veh Ops Status Lights"
"ID: 1"
"Length: 6"

qDebug() << can_identity;

(("PCU", "veh Ops Status Lights", "1", "6"), ("PCU", "veh Sensors", "2", "5"), ("PCU", "veh Faults", "3", "5"), ("PCU", "PCM Faults", "4", "2"), ("PCU", "faults", "5", "4"), ("PCU", "Fuel level", "6", "8"), ("PCU", "Speed", "7", "8"), ("PCU", "Engine Hr Req", "8", "8"), ("PCU", "Odo and Trip", "9", "8"), ("PCU", "Trip 2", "10", "8"), ("IOU", "Sync Counter", "11", "2"), ("IOU", "IOU1 Engine", "23", "2"), ("IOU", "IOU1 Alive", "112", "8"), ("IOU", "IOU1 PCM Fault", "20A", "2"), ("IOU", "IOU1 IOM Fault", "40A", "4"), ("IOU", "IOU1 UNIT Fault", "15C", "4"))

void DetectionVar::ReadXML()
{
    filename = QCoreApplication::applicationDirPath() + "/" + "CANBus_Data.xml";
    qDebug() << filename;
    QFile f(filename);
    if (!f.open(QIODevice::ReadOnly | QIODevice::Text))
    {
        qDebug() << "Cannot read file" << f.errorString();
        return;
    }

    xmlReader.setDevice(&f);

    while(!xmlReader.atEnd())
    {
        xmlReader.readNext();

        if (xmlReader.isStartElement())
        {
            if (xmlReader.name() == "CANBUS")
            {

                while(xmlReader.readNextStartElement())
                {
                    if (xmlReader.name()== "SYSTEM" && xmlReader.attributes().hasAttribute("ID"))
                    {
                        DataCAN.System = xmlReader.attributes().value("ID").toString();

                        while(xmlReader.readNextStartElement())
                        {
                            if (xmlReader.name()== "CAN" && xmlReader.attributes().hasAttribute("ID"))
                            {
                                DataCAN.CAN_ident = xmlReader.attributes().value("ID").toString();

                                while(xmlReader.readNextStartElement())
                                {
                                   if (xmlReader.name()== "ID")
                                   {
                                       DataCAN.ID = xmlReader.readElementText();
                                   }

                                   else if (xmlReader.name()== "Length")
                                   {
                                       DataCAN.Length = xmlReader.readElementText();
                                   }
                                }

                                can_identity.append(DataCAN);
                            }

                        }

                    }

                }
            }
        }
    }

    if (xmlReader.hasError())
    {
        qDebug() << "XML Error: " << xmlReader.errorString().data();
    }

    f.close();


    for (int i = 0; i <can_identity.length(); i++ )
    {
        qDebug()<< "System: " + can_identity.at(i).System;
        qDebug()<< "Ident: " + can_identity.at(i).CAN_ident;
        qDebug()<< "ID: " + can_identity.at(i).ID;
        qDebug()<< "Length: " + can_identity.at(i).Length;
    }

}