天要做一个结果列表,就采用了xml,然后就用Qt的DOM来解析,结果发现,每次执行到QDomDocument的setContent方法都要报错,贴代码:

xml文件:recordshistoryrecords.xml
<?xml version="1.0" encoding="UTF-8" ?>
<historyrecords>
    <record id="01">
        <injectamount>100</injectamount>
        <speedtime>0.5</speedtime>
        <psi>1200</psi>
        <time>0.6</time>
        <status>good</status>
    </record>
    <record id="02">
        <injectamount>110</injectamount>
        <speedtime>0.6</speedtime>
        <psi>1100</psi>
        <time>0.3</time>
        <status>bad</status>
    </record>
</historyrecords>

解析xml文件的代码:

void historyrecords::showhisrecords() {
 
    QDomDocument doc;
    QFile file("recordshistoryrecords.xml");
    QString errorStr;
    int errorLine;
    int errorCol;
    //setContent是将指定的内容指定给QDomDocument解析，
    //第一参数可以是QByteArray或者是文件名等
    if(!doc.setContent(&file,true,&errorStr,&errorLine,&errorCol))
    {
        //如果出错，则会进入这里。errorStr得到的是出错说明
        //errorLine和errorCol则是出错的行和列
        qDebug() << errorStr << "line: " << errorLine << "col: " << errorCol;
    }
 
    QDomNode firstNode = doc.firstChild();
 
    qDebug() << qPrintable(firstNode.nodeName()) << qPrintable(firstNode.nodeValue());
 
}

每次报错都会报:
"error occurred while parsing element" line:  1 col:  1

void historyrecords::showhisrecords() {
 
    QDomDocument doc;
    QFile file("recordshistoryrecords.xml");
    file.open(QIODevice::ReadOnly);
    QString errorStr;

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