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Qt 筆記3--Qt 操作 XML

Qt 筆記3--Qt 操作 XML

XML 可擴充标記語言（eXtensible Markup Language），被設計用來傳輸和存儲資料，是目前使用最廣泛的網絡資料傳輸格式之一。

Qt提供了一系列基于DOM的XML處理類，包括：QDomComment、QDomProcessingInstruction、QDomComment、QDomElement、QDomText、QDomDocumentType、QDomNodeList等 ，以下為筆者最近學習Qt XML解析功能時寫的一些用例，相應學習筆記分享在此處，以便于後續參考。若後續有新的功能或者案例，也會在此處加以補充！

1、XML基礎知識

XML 可擴充标記語言（eXtensible Markup Language）,被設計用來傳輸和存儲資料。

1.1 XML 結構 

<?xml version="1.0" encoding="UTF-8"?>
<note>
<to>Tove</to>
<from>Jani</from>
<heading>Reminder</heading>
<body>Don't forget me this weekend!</body>
</note>

第一行是 XML 聲明。它定義 XML 的版本（1.0）和所使用的編碼；

第二行描述文檔的根元素；

接下來 4 行描述根的 4 個子元素（to, from, heading 以及 body）；

最後一行定義根元素的結尾。

XML 文檔形成一種樹結構；

XML 文檔必須包含根元素，該元素是所有其他元素的父元素；

XML 文檔中的元素形成了一棵文檔樹。這棵樹從根部開始，并擴充到樹的最底端；

所有的元素都可以有子元素；父、子以及同胞等術語用于描述元素之間的關系，父元素擁有子元素，相同層級上的子元素成為同胞（兄弟或姐妹），所有的元素都可以有文本内容和屬性。

1.2 XML文法規則

XML 必須包含根元素，它是所有其他元素的父元素；

XML的聲明是可選部分，如果存在需要放在文檔的第一行，一般标注版本、編碼等資訊；

在XML中，省略關閉标簽是非法的，所有元素都必須有關閉标簽，其中聲明不是XML正文的一部分，它沒有标簽；

XML标簽對大小寫敏感，必須使用相同的大小寫來編寫打開标簽和關閉标簽；

XML中所有元素都必須彼此正确地嵌套，若A嵌套在B中，那麼A的開始和結束都需要在B中；

XML 屬性值必須加引号;XML中，一些字元擁有特殊的意義,如果把字元 "<" 放在XML元素中，會發生錯誤，這是因為解析器會把它當作新元素的開始,為了避免這個錯誤，請用實體引用來代替 "<" 字元，例如：為了避免<字元帶來的錯誤，需要将

<message>if salary < 1000 then</message>

替換為：

<message>if salary &lt; 1000 then</message>

在XML中，有 5 個預定義的實體引用，如下表所示：

&lt < less than
&gt; > greater than
&amp; & ampersand
&apos; ' apostrophe
&quot; " quotation mark

在 XML 中編寫注釋的文法與 HTML 的文法很相似，采用<!-- 注釋内容 -->的方式；

在 XML 中，文檔中的空格不會被删減。

2、功能說明

目前根據需要初步實作如下功能，後續會根據需要會添加一些新功能和案例！

1）從XML文檔/字元串讀取資料--F1GetDocumentFromFile、F2GetDocumentFromStr

2）輸出XML資料--M1LoadXmlFromDoc

3）擷取某元素最外層所有屬性--M2GetAllAttributes

4）擷取某元素子層的所有元素--M3GetAllSubNodes

5）建立一個XML--M4CreateXML

6）将XML儲存到本地--M5SaveXML

3、源代碼

3.1 XML

代碼包括三個主要檔案：xmlclass.h、xmlclass.cpp、main.cpp，源碼如下：

xmlclass.h

#ifndef XMLCLASS_H
#define XMLCLASS_H

#include <QObject>
#include <QDebug>
#include <QFile>
#include <QList>

#include <QDomDocument>
#include <QDomDocumentType>
#include <QDomElement>
#include <QDomNodeList>

class XmlClass
{
public:
    XmlClass();
    QDomDocument F1GetDocumentFromFile(QString PathName);
    QDomDocument F2GetDocumentFromStr(QString XMLstr);
    void TestF2GetDocumentFromStr();
    void M1LoadXmlFromDoc(QString PathName);
    void TestM1LoadXmlFromDoc();
    void M2GetAllAttributes(QDomElement de);
    void TestM2GetAllAttributes();
    QList<QDomElement> M3GetAllSubNodes(QDomElement de);
    void TestM3GetAllSubNodes();
    QDomDocument M4CreateXML();
    void TestM4CreateXML();
    void M5SaveXML(QDomDocument de,QString PathName);
    void TestM5SaveXML();
};

#endif // XMLCLASS_H

xmlclass.cpp

#include "xmlclass.h"

XmlClass::XmlClass()
{
    qDebug()<<"Initial XmlClass!";
}

QDomDocument XmlClass::F1GetDocumentFromFile(QString PathName)
{
    /*
    * 該函數用于從某個檔案讀取XML,并傳回document對象
    */
    QDomDocument doc;
    QFile file(PathName);
    if(!file.open(QIODevice::ReadOnly))
    {
        qDebug()<<"Read file error!";
    }
    if(!doc.setContent(&file))
    {
        qDebug()<<"SetContent Error!";
        file.close();
    }
    file.close();
    return doc;
}

QDomDocument XmlClass::F2GetDocumentFromStr(QString XMLstr)
{
    /*
    * 該函數用于從XMLStr中讀取XML,并傳回QDomDocument對象
    */
    qDebug()<<"\nF2:Get Document From Str!";
    qDebug().noquote()<<"XMLStr:"<<XMLstr;
    QDomDocument doc;
    doc.setContent(XMLstr);
    return doc;
}

void XmlClass::TestF2GetDocumentFromStr()
{
    QString xmlStr = "<?xml version=\"1.0\" encoding=\"UTF-8\"?><note><to>Tove</to><from>Jani</from><heading>Reminder</heading><body>Don't forget me this weekend!</body></note>";
    QDomDocument doc = F2GetDocumentFromStr(xmlStr);
    if(!doc.isNull()){
        qDebug().noquote()<<doc.toString(2);//default indent is 1
    }else{
        qDebug()<<"Load XML From String Error!";
    }
}

void XmlClass::M1LoadXmlFromDoc(QString PathName)
{
    /*
    * 該函數用于從某個檔案讀取XML并輸出
    */
    qDebug()<<"\nM1:Load XML!";
    QDomDocument doc = F1GetDocumentFromFile(PathName);
    if(!doc.isNull()){
        qDebug().noquote()<<doc.toString(2);//default indent is 1
    }else{
        qDebug()<<"Load XML Error!";
    }
}

void XmlClass::TestM1LoadXmlFromDoc()
{
    M1LoadXmlFromDoc("20150609094727.jdf");
}

void XmlClass::M2GetAllAttributes(QDomElement de)
{
    /*
    * 該函數用于擷取某個元素的最外層所有屬性
    */
    qDebug()<<"\nM2:Get All Attributes!";
    if(!de.isNull())
    {
        qDebug().noquote()<<de.tagName()<<" attributes:";
        QDomNamedNodeMap dnn = de.attributes();
        for(int i=0;i<dnn.size();i++)
        {
            QDomNode dn = dnn.item(i);
            qDebug().noquote()<<dn.nodeName()<<":"<<dn.nodeValue();
        }
    }
}

void XmlClass::TestM2GetAllAttributes()
{
    QString PathName = "20150609094727.jdf";
    QDomDocument doc = F1GetDocumentFromFile(PathName);
    if(!doc.isNull()){
        QDomElement de = doc.documentElement();
        M2GetAllAttributes(de);
    }else
    {
        qDebug()<<"Load XML Error!";
    }
}

QList<QDomElement>  XmlClass::M3GetAllSubNodes(QDomElement de)
{
    /*
    * 該函數用于擷取某個元素的子層所元素，并輸出子層所有元素的tagname
    */
    qDebug()<<"\nM3:Get All SubNodes!";
    QList<QDomElement> DeList;
    for(QDomNode n=de.firstChild();!n.isNull();n=n.nextSibling())
    {
        QDomElement tmp = n.toElement();
        DeList.append(tmp);
    }
    return DeList;
}

void XmlClass::TestM3GetAllSubNodes()
{
    QString PathName = "20150609094727.jdf";
    QDomDocument doc = F1GetDocumentFromFile(PathName);
    if(!doc.isNull()){
        QDomElement de = doc.documentElement();
        QList<QDomElement> DeList = M3GetAllSubNodes(de);
        qDebug()<<"DeList Size："<<DeList.size();
        for(int i=0;i<DeList.size();i++)
        {
            QDomElement tmp = DeList[i];
            if(tmp.text()!=NULL){
                qDebug().noquote()<<tmp.tagName()<<":"<<tmp.text();
            }else{
                qDebug().noquote()<<tmp.tagName();
            }
        }
    }else
    {
        qDebug()<<"Load XML Error!";
    }
}

QDomDocument XmlClass::M4CreateXML()
{
    /*
    * 該函數用于建立一個XML
    * 建立内容如下：
<?xml version="1.0" encoding="UTF-8"?>
<!-- This is a comment -->
<note Attr="note attr">
    <to>Tove</to>
    <from>Jani</from>
    <date ymd="2019-03-29" />
    <heading>Reminder</heading>
    <body AttrH="300" AttrW="600">Don't forget me this weekend!</body>
</note>
    */
    qDebug()<<"\nM4:Create XML!";
    QDomDocument doc;
    //1)添加聲明
    QDomProcessingInstruction DPI = doc.createProcessingInstruction("xml","version=\"1.0\" encoding=\"UTF-8\"");
    doc.appendChild(DPI);
    //2)添加注釋
    QDomComment DC = doc.createComment("This is a comment");
    doc.appendChild(DC);
    //3)添加根元素note
    QDomElement DE = doc.createElement("note");
    DE.setAttribute("Atte","note attr");//添加屬性
    doc.appendChild(DE);
    //4-1)添加子元素to
    QDomElement DE1 = doc.createElement("to");
    QDomText DT1 = doc.createTextNode("Tove");
    DE1.appendChild(DT1);
    DE.appendChild(DE1);
    //4-2)添加子元素from
    QDomElement DE2 = doc.createElement("from");
    QDomText DT2 = doc.createTextNode("Jani");
    DE2.appendChild(DT2);
    DE.appendChild(DE2);
    //4-3)添加子元素date
    QDomElement DE3 = doc.createElement("date");
    DE3.setAttribute("ymd","2019-03-29");
    DE.appendChild(DE3);
    //4-4)添加子元素heading
    QDomElement DE4 = doc.createElement("heading");
    QDomText DT4 = doc.createTextNode("Reminder");
    DE4.appendChild(DT4);
    DE.appendChild(DE4);
    //4-5)添加子元素body
    //<body AttrH="300" AttrW="600">Don't forget me this weekend!</body>
    QDomElement DE5 = doc.createElement("body");
    DE5.setAttribute("AttrH","300");
    DE5.setAttribute("AttrW","600");
    QDomText DT5 = doc.createTextNode("Don't forget me this weekend!");
    DE4.appendChild(DT5);
    DE.appendChild(DE5);
    return doc;
}

void XmlClass::TestM4CreateXML()
{
    QDomDocument doc = M4CreateXML();
    qDebug().noquote()<<doc.documentElement().tagName()<<"info:";
    qDebug().noquote()<<doc.toString(2);
}

void XmlClass::M5SaveXML(QDomDocument de,QString PathName)
{
    /*
    * 該函數用于将XML儲存到本地
    */
    QFile file(PathName);
    if(file.open(QFile::WriteOnly|QFile::Text))
    {
        QTextStream out(&file);
        de.save(out,QDomNode::EncodingFromDocument);
        file.close();
        qDebug()<<"\nM5:Save XML Done!";
    }else
    {
        qDebug()<<"M5:Open File Error!";
    }
}

void XmlClass::TestM5SaveXML()
{
    qDebug()<<"\nM5:Save XML!";
    QString xmlStr = "<?xml version=\"1.0\" encoding=\"UTF-8\"?><note><to>Tove</to><from>Jani</from><heading>Reminder</heading><body>Don't forget me this weekend!</body></note>";
    QDomDocument doc = F2GetDocumentFromStr(xmlStr);
    if(!doc.isNull()){
        M5SaveXML(doc,"Tmp.xml");
    }else{
        qDebug()<<"Load XML From String Error!";
    }
}

main.cpp

#include <QCoreApplication>
#include "xmlclass.h"

int main(int argc, char *argv[])
{
    QCoreApplication a(argc, argv);

    XmlClass *XCobj = new XmlClass();
    XCobj->TestF2GetDocumentFromStr();
    XCobj->TestM1LoadXmlFromDoc();
    XCobj->TestM2GetAllAttributes();
    XCobj->TestM3GetAllSubNodes();
    XCobj->TestM4CreateXML();
    XCobj->TestM5SaveXML();
    delete XCobj;

    return a.exec();
}

4、測試結果

1）從XML文檔/字元串讀取資料--F1GetDocumentFromFile、F2GetDocumentFromStr

F2:Get Document From Str!
XMLStr: <?xml version="1.0" encoding="UTF-8"?><note><to>Tove</to><from>Jani</fro
m><heading>Reminder</heading><body>Don't forget me this weekend!</body></note>
<?xml version='1.0' encoding='UTF-8'?>
<note>
  <to>Tove</to>
  <from>Jani</from>
  <heading>Reminder</heading>
  <body>Don't forget me this weekend!</body>
</note>

2）輸出XML資料--M1LoadXmlFromDoc

M1:Load XML!
<?xml version='1.0' encoding='utf-8'?>
<JDF ICSVersions="Base_L1-1.4" **此處省略部分内容** Activation
="Active">
  <Comment Name="JobDescription"/>
** 此處省略一部分内容**
  <AuditPool>
    <Created AgentName="Caldera JDF" AgentVersion="10.0" TimeStamp="2015-06-09T0
9:47:27+02:00"/>
  </AuditPool>
</JDF>

3）擷取某元素最外層所有屬性--M2GetAllAttributes

M2:Get All Attributes!
JDF  attributes:
ICSVersions : Base_L1-1.4
Type : DigitalPrinting
Version : 1.4
DescriptiveName : 20150609094727
Status : Waiting
xmlns:xsi : http://www.w3.org/2001/XMLSchema-instance
ID : 20150609094727
xmlns:cal : http://www.caldera.com/jdf
JobPartID : 1
xmlns : http://www.CIP4.org/JDFSchema_1_1
JobID : 20150609094727
Activation : Active

4）擷取某元素子層的所有元素--M3GetAllSubNodes

M3:Get All SubNodes!
DeList Size： 4
Comment
ResourcePool
ResourceLinkPool
AuditPool

5）建立一個XML--M4CreateXML

M4:Create XML!
note info:
<?xml version="1.0" encoding="UTF-8"?>
<!--This is a comment-->
<note Atte="note attr">
  <to>Tove</to>
  <from>Jani</from>
  <date ymd="2019-03-29"/>
  <heading>ReminderDon't forget me this weekend!</heading>
  <body AttrW="600" AttrH="300"/>
</note>

6）将XML儲存到本地--M5SaveXML

M5:Save XML!

F2:Get Document From Str!
XMLStr: <?xml version="1.0" encoding="UTF-8"?><note><to>Tove</to><from>Jani</fro
m><heading>Reminder</heading><body>Don't forget me this weekend!</body></note>

M5:Save XML Done!

5、XML案例

5.1、構造XML案例1

該案例主要用于生成如下XML文檔，其具體内容和源碼如下：

XML文檔内容：

<?xml version="1.0" encoding="UTF-8"?>
<!--This is Two Jobs Nested->JDF_INPUT->20150609112433.jdf-->
<JDF JobID="20150609112433" JobPartID="1" Activation="Active" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:cal="http://www.caldera.com/jdf" xmlns="http://www.CIP4.org/JDFSchema_1_1" Version="1.4" Type="DigitalPrinting" ID="20150609112433" Status="Waiting" ICSVersions="Base_L1-1.4" DescriptiveName="20150609112433">
    <Comment Name="JobDescription"/>
    <ResourcePool>
        <RunList Class="Parameter" DocCopies="2" ID="RL001" Status="Available">
            <LayoutElement>
                <FileSpec URL="file://FILES/20150609112433/FlameBoy_Cut.eps"/>
            </LayoutElement>
        </RunList>
        <DigitalPrintingParams Class="Parameter" ID="DPP001" Status="Available"/>
        <CustomerInfo CustomerOrderID="" Class="Parameter" CustomerID="ORDER001" ID="CI001" Status="Available">
            <Contact ContactTypes="Sales">
                <Address Street="1 rue des frères lumières" City="xxx" Country="France" PostalCode="xxx"/>
                <Company OrganizationName=""/>
                <ComChannel ChannelType="Phone" Locator="tel:+xxxx"/>
                <ComChannel ChannelType="Fax" Locator="tel:+xxx"/>
                <Person Languages="EN" JobTitle="Manager" FirstName="">
                    <Address Street="1 rue des xxx" City="Strasbourg" Country="France" PostalCode="xxxx"/>
                    <ComChannel ChannelType="Email" Locator="mailto:[email protected]"/>
                </Person>
            </Contact>
        </CustomerInfo>
        <Device Class="Implementation" DeviceID="CalderaJet:Nest" ID="DEV001" Status="Available"/>
        <Component Class="Quantity" ID="C001" Status="Unavailable" ComponentType="FinalProduct"/>
    </ResourcePool>
    <ResourceLinkPool>
        <DigitalPrintingParamsLink Usage="DPP001"/>
        <RunListLink Usage="Input" rRef="RL001"/>
        <CustomerInfoLink Usage="Input" ref="CI001"/>
        <DeviceLink Usage="Input" rRef="DEV001"/>
        <ComponentLink Usage="Input" rRef="C001"/>
    </ResourceLinkPool>
    <AuditPool>
        <Created AgentVersion="10.0" AgentName="Caldera JDF" TimeStamp="2015-06-09T11:24:33+02:00"/>
    </AuditPool>
</JDF>

源碼：

QDomDocument JtCreateJDF();
    void JtTestCreateJDF();
    void JtSaveJDF();      
QDomDocument XmlClass::JtCreateJDF()
{
    QDomDocument doc;
    //1)添加聲明
    QDomProcessingInstruction DPI = doc.createProcessingInstruction("xml","version=\"1.0\" encoding=\"UTF-8\"");
    doc.appendChild(DPI);
    //2)添加注釋
    QDomComment DC = doc.createComment("This is Two Jobs Nested->JDF_INPUT->20150609112433.jdf");
    doc.appendChild(DC);
    //3)添加根元素JDF
    QDomElement DE = doc.createElement("JDF");
    DE.setAttribute("xmlns:cal","http://www.caldera.com/jdf");//添加屬性
    DE.setAttribute("xmlns:xsi","http://www.w3.org/2001/XMLSchema-instance");
    DE.setAttribute("ID","20150609112433");
    DE.setAttribute("JobID","20150609112433");
    DE.setAttribute("JobPartID","1");
    DE.setAttribute("Status","Waiting");
    DE.setAttribute("Activation","Active");
    DE.setAttribute("Type","DigitalPrinting");
    DE.setAttribute("Version","1.4");
    DE.setAttribute("ICSVersions","Base_L1-1.4");
    DE.setAttribute("DescriptiveName","20150609112433");
    DE.setAttribute("xmlns","http://www.CIP4.org/JDFSchema_1_1");
    doc.appendChild(DE);
    //4-1)添加子元素Comment
    QDomElement DE1 = doc.createElement("Comment");
    DE1.setAttribute("Name","JobDescription");
    DE.appendChild(DE1);
    //4-2)添加子元素ResourcePool
    QDomElement DE2 = doc.createElement("ResourcePool");
    QDomElement DE21 = doc.createElement("RunList");
    DE21.setAttribute("Class","Parameter");
    DE21.setAttribute("ID","RL001");
    DE21.setAttribute("Status","Available");
    DE21.setAttribute("DocCopies","2");
    QDomElement DE211 = doc.createElement("LayoutElement");
    QDomElement DE2111 = doc.createElement("FileSpec");
    DE2111.setAttribute("URL","file://FILES/20150609112433/FlameBoy_Cut.eps");
    DE211.appendChild(DE2111);
    DE21.appendChild(DE211);
    QDomElement DE22 = doc.createElement("DigitalPrintingParams");
    DE22.setAttribute("Class","Parameter");
    DE22.setAttribute("ID","DPP001");
    DE22.setAttribute("Status","Available");
    QDomElement DE23 = doc.createElement("CustomerInfo");
    DE23.setAttribute("Class","Parameter");
    DE23.setAttribute("ID","CI001");
    DE23.setAttribute("Status","Available");
    DE23.setAttribute("CustomerID","ORDER001");
    DE23.setAttribute("CustomerOrderID","");
    QDomElement DE231 = doc.createElement("Contact");
    DE231.setAttribute("ContactTypes","Sales");
    QDomElement DE2311 = doc.createElement("Address");
    DE2311.setAttribute("City","xxx");
    DE2311.setAttribute("Country","France" );
    DE2311.setAttribute("PostalCode","xxx" );
    DE2311.setAttribute("Street","1 rue des frères lumières");
    QDomElement DE2312 = doc.createElement("Company");
    DE2312.setAttribute("OrganizationName","");
    QDomElement DE2313 = doc.createElement("ComChannel");
    DE2313.setAttribute("ChannelType","Phone");
    DE2313.setAttribute("Locator","tel:+xxxx");
    QDomElement DE2314 = doc.createElement("ComChannel");
    DE2314.setAttribute("ChannelType","Fax");
    DE2314.setAttribute("Locator","tel:+xxx");
    QDomElement DE2315 = doc.createElement("Person");
    DE2315.setAttribute("FirstName","");
    DE2315.setAttribute("JobTitle","Manager");
    DE2315.setAttribute("Languages","EN");
    QDomElement DE23151 = doc.createElement("Address");
    DE23151.setAttribute("City","Strasbourg");
    DE23151.setAttribute("Country","France");
    DE23151.setAttribute("PostalCode","xxxx");
    DE23151.setAttribute("Street","1 rue des xxx");
    QDomElement DE23152 = doc.createElement("ComChannel");
    DE23152.setAttribute("ChannelType","Email");
    DE23152.setAttribute("Locator","mailto:[email protected]");
    DE2315.appendChild(DE23151);
    DE2315.appendChild(DE23152);
    DE231.appendChild(DE2311);
    DE231.appendChild(DE2312);
    DE231.appendChild(DE2313);
    DE231.appendChild(DE2314);
    DE231.appendChild(DE2315);
    DE23.appendChild(DE231);

    QDomElement DE24 = doc.createElement("Device");
    DE24.setAttribute("Class","Implementation");
    DE24.setAttribute("ID","DEV001");
    DE24.setAttribute("Status","Available");
    DE24.setAttribute("DeviceID","CalderaJet:Nest");
    QDomElement DE25 = doc.createElement("Component");
    DE25.setAttribute("Class","Quantity");
    DE25.setAttribute("ID","C001");
    DE25.setAttribute("Status","Unavailable");
    DE25.setAttribute("ComponentType","FinalProduct");
    DE2.appendChild(DE21);
    DE2.appendChild(DE22);
    DE2.appendChild(DE23);
    DE2.appendChild(DE24);
    DE2.appendChild(DE25);
    DE.appendChild(DE2);
    //4-3)添加子元素ResourceLinkPool
    QDomElement DE3 = doc.createElement("ResourceLinkPool");
    QDomElement DE31 = doc.createElement("DigitalPrintingParamsLink");
    DE31.setAttribute("Usage","Input");
    DE31.setAttribute("Usage","DPP001");
    QDomElement DE32 = doc.createElement("RunListLink");
    DE32.setAttribute("Usage","Input");
    DE32.setAttribute("rRef","RL001");
    QDomElement DE33 = doc.createElement("CustomerInfoLink");
    DE33.setAttribute("Usage","Input");
    DE33.setAttribute("ref","CI001");
    QDomElement DE34 = doc.createElement("DeviceLink");
    DE34.setAttribute("Usage","Input");
    DE34.setAttribute("rRef","DEV001");
    QDomElement DE35 = doc.createElement("ComponentLink");
    DE35.setAttribute("Usage","Input");
    DE35.setAttribute("rRef","C001");
    DE3.appendChild(DE31);
    DE3.appendChild(DE32);
    DE3.appendChild(DE33);
    DE3.appendChild(DE34);
    DE3.appendChild(DE35);
    DE.appendChild(DE3);
    //4-4)添加子元素AuditPool
    QDomElement DE4 = doc.createElement("AuditPool");
    QDomElement DE41 = doc.createElement("Created");
    DE41.setAttribute("AgentName","Caldera JDF");
    DE41.setAttribute("AgentVersion","10.0");
    DE41.setAttribute("TimeStamp","2015-06-09T11:24:33+02:00");
    DE4.appendChild(DE41);
    DE.appendChild(DE4);
    return doc;
}

void XmlClass::JtTestCreateJDF()
{
    QDomDocument doc = JtCreateJDF();
    //qDebug().noquote()<<'\n\n'<<doc.documentElement().tagName()<<":";
    qDebug().noquote()<<doc.toString(2);
}

void XmlClass::JtSaveJDF()
{
    /*
    * 該函數用于将JDF儲存到本地
    */
    QString PathName="JDF_I_20150609112433.jdf";
    QDomDocument doc = JtCreateJDF();
    if(!doc.isNull()){
        QFile file(PathName);
        if(file.open(QFile::WriteOnly|QFile::Text))
        {
            QTextStream out(&file);
            doc.save(out,4,QDomNode::EncodingFromDocument);
            file.close();
            qDebug()<<"\nSave JDF Done!";
        }else
        {
            qDebug()<<"Open File Error!";
        }
    }else{
        qDebug()<<"doc is NULL!";
    }
}

6、說明

以上代碼預設測試環境為Qt 5.7，測試系統為Windows7 x64

xml Qt操作XML Qt XML 常見操作 QDom*
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