demo，迅雷链接。或者我主页上传的资源
链接：https://pan.xunlei.com/s/VO8bIvYFfhmcrwF-7wmcPW1SA1?pwd=nrp4#
复制这段内容后打开手机迅雷App，查看更方便
#ifndef MAINWINDOW_H
#define MAINWINDOW_H
#include <QMainWindow>
#include <QTextCodec>
#include <QFile>
#include <QDomDocument>
#include <QTextStream>
QT_BEGIN_NAMESPACE
namespace Ui { class MainWindow; }
QT_END_NAMESPACE
typedef struct
{
QString num_name;
QString subFcParaName;
double workMin;
double workMax;
}attachedCondition;
class ConditionClass
{
public:
ConditionClass(){};
~ConditionClass(){};
QString fcParaName;
double earlyMin;
double earlyMax;
double alarmMin;
double alarmMax;
QList<attachedCondition>attached_contidition_;
};
class MainWindow : public QMainWindow
{
Q_OBJECT
public:
MainWindow(QWidget *parent = nullptr);
~MainWindow();
void removeNode(QString xml_path,QString node_name);
void updateNode(QString xml_path,QList<ConditionClass>all_condition_);
void loadXml(QString xml_path);
void createXML(QString filePath);
QDomElement createAttributrNode(QDomDocument &doc,QString attribute_value,QString node_name);
QDomElement createNode(QDomDocument &doc,QString value,QString node_name);
QDomElement createNode(QDomDocument &doc,double value,QString node_name);
void appendXml(QDomDocument &doc,QDomElement &root,QList<ConditionClass>all_condition_);
//这是要存进去的数据
QList<ConditionClass>all_condition_;
//这是要读取出来的数据
QList<ConditionClass>read_all_data_;
private:
Ui::MainWindow *ui;
};
#endif // MAINWINDOW_H
#include "mainwindow.h"
#include "ui_mainwindow.h"
#include<QDebug>
MainWindow::MainWindow(QWidget *parent)
: QMainWindow(parent)
, ui(new Ui::MainWindow)
{
ui->setupUi(this);
ConditionClass it;
it.fcParaName="油压";
it.earlyMin=55;
it.earlyMax=66;
it.alarmMax=88;
it.alarmMin=77;
attachedCondition at;
at.num_name="附属1";
at.subFcParaName="高度表";
at.workMin=5;
at.workMax=6;
it.attached_contidition_.append(at);
attachedCondition at0;
at0.num_name="附属2";
at0.subFcParaName="液压油温度";
at0.workMin=5;
at0.workMax=6;
it.attached_contidition_.append(at0);
ConditionClass it0;
it0.fcParaName="1发N1";
it0.earlyMin=55;
it0.earlyMax=66;
it0.alarmMax=88;
it0.alarmMin=77;
attachedCondition at00;
at00.num_name="附属1";
at00.subFcParaName="机油温度";
at00.workMin=5;
at00.workMax=6;
it0.attached_contidition_.append(at00);
all_condition_.append(it);
all_condition_.append(it0);
QString path= "C:/Users/36075/Desktop/ycn_xml/xml_ycn/warnRuler.xml";
createXML(path);
removeNode(path,"1发N1");
removeNode(path,"油压");
updateNode( path,all_condition_);
loadXml(path);
}
MainWindow::~MainWindow()
{
delete ui;
}
/**
* @brief 创建一个xml文档
* @param 路径
* @param 基本参数
*/
void MainWindow::createXML(QString filePath)
{
QFile file(filePath);
bool isOk = file.open(QIODevice::ReadWrite);
if(file.size()!=0)
{
return;
}
QDomDocument doc;
QDomProcessingInstruction instruction;
instruction=doc.createProcessingInstruction("xml","version=\"1.0\" encoding=\"UTF-8\"");
doc.appendChild(instruction);
QDomElement root = doc.createElement("root");
doc.appendChild(root);
appendXml(doc,root,this->all_condition_);
// appendXml(doc,root,this->all_condition_);
QTextStream stream(&file);
stream.setCodec("UTF_8");
doc.save(stream,4,QDomNode::EncodingFromTextStream);
file.close();
}
void MainWindow::loadXml(QString xml_path)
{
QFile file(xml_path);
if(!file.open(QFile::ReadOnly | QFile::Text))
{
return;
}
QString strError;
int errorLine;
int errorColumn;
QDomDocument doc;
if(!doc.setContent(&file, false, &strError, &errorLine, &errorColumn)){
return;
}
QDomElement root = doc.documentElement();
if(root.tagName() == "root")
{
QDomNode first = root.firstChild();
while(!first.isNull())
{
ConditionClass cc;
if(first.toElement().tagName() == "主参数")
{
QString str = first.toElement().attribute("主参数");
qDebug()<<str;
cc.fcParaName=str;
QDomNode node = first.firstChild();
while(!node.isNull())
{
if(node.toElement().tagName() == "earlyMin")
{
QString earlyMin = node.toElement().text();
qDebug()<<earlyMin;
cc.earlyMin=earlyMin.toDouble();
}
if(node.toElement().tagName() == "earlyMax")
{
QString earlyMax = node.toElement().text();
qDebug()<<earlyMax;
cc.earlyMax=earlyMax.toDouble();
}
if(node.toElement().tagName() == "alarmMax")
{
QString alarmMax = node.toElement().text();
qDebug()<<alarmMax;
cc.alarmMax=alarmMax.toDouble();
}
if(node.toElement().tagName() == "alarmMin")
{
QString alarmMin = node.toElement().text();
qDebug()<<alarmMin;
cc.alarmMin=alarmMin.toDouble();
}
if(node.toElement().tagName() == "附属")
{
//访问附属下面的子节点
QString attri = node.toElement().attribute("附属");
qDebug()<<attri;
QDomNode attrinode = node.firstChild();
while(!attrinode.isNull())
{
attachedCondition atc;
//附属1里面的子节点内容访问一下
qDebug()<<attrinode.toElement().tagName();
atc.num_name=attrinode.toElement().tagName();
QDomNode attrinode1 = attrinode.firstChild();
while(!attrinode1.isNull())
{
if(attrinode1.toElement().tagName() == "参数名")
{
QString diany = attrinode1.toElement().text();
qDebug()<<diany;
atc.subFcParaName=diany;
}
if(attrinode1.toElement().tagName() == "workMin")
{
QString diany = attrinode1.toElement().text();
qDebug()<<diany;
atc.workMin=diany.toDouble();
}
if(attrinode1.toElement().tagName() == "workMax")
{
QString diany = attrinode1.toElement().text();
qDebug()<<diany;
atc.workMax=diany.toDouble();
}
attrinode1=attrinode1.nextSibling();
}
cc.attached_contidition_.append(atc);
attrinode = attrinode.nextSibling();
}
}
node = node.nextSibling();
}
}
this->read_all_data_.append(cc);
first = first.nextSibling();
}
}
file.close();
}
/**
* @brief 打开路径下的xml文档，删除指定名称的节点
* @param 路径
* @param 基本参数
*/
void MainWindow::removeNode(QString xml_path,QString node_name)
{
QFile file(xml_path);
if(!file.open(QFile::ReadOnly|QFile::WriteOnly | QFile::Text))
{
return;
}
QString strError;
int errorLine;
int errorColumn;
QDomDocument doc;
if(!doc.setContent(&file, false, &strError, &errorLine, &errorColumn)){
return;
}
file.close();
QDomElement root = doc.documentElement();
if(root.tagName() == "root")
{
QDomNode first = root.firstChild();
while(!first.isNull())
{
if(first.toElement().attribute("主参数") ==node_name)
{
root.removeChild(first);
// break;
}
first = first.nextSibling();
}
}
if(!file.open(QFile::WriteOnly|QFile::Truncate))
return;
QTextStream out_stream(&file);
doc.save(out_stream,4); //缩进4格
file.close();
}
/**
* @brief 打开xml文档，然后往里面写数据
* @param
* @param
*/
void MainWindow::updateNode(QString xml_path,QList<ConditionClass>all_condition_)
{
QFile file(xml_path); //相对路径、绝对路径、资源路径都可以
if(!file.open(QFile::ReadOnly))
return;
//增加一个一级子节点以及元素
QDomDocument doc;
if(!doc.setContent(&file))
{
file.close();
return;
}
file.close();
QDomElement root=doc.documentElement();
if(all_condition_.isEmpty())
{
return;
}
for(auto it:all_condition_)
{
auto fcParaName=it.fcParaName;
auto earlyMin= it.earlyMin;
auto earlyMax= it.earlyMax;
auto alarmMax= it.alarmMax;
auto alarmMin= it.alarmMin;
auto main_para= createAttributrNode(doc,fcParaName,"主参数");
root.appendChild(main_para);
main_para.appendChild(createNode(doc,earlyMin,"earlyMin"));
main_para.appendChild(createNode(doc,earlyMax,"earlyMax"));
main_para.appendChild(createNode(doc,alarmMax,"alarmMax"));
main_para.appendChild(createNode(doc,alarmMin,"alarmMin"));
if(!it.attached_contidition_.isEmpty())
{
auto attribute_para=createAttributrNode(doc,"附属","附属");
main_para.appendChild(attribute_para);
for(auto item:it.attached_contidition_)
{
int i=0;
//QString attribute_para=tr("附属")+QString::number(i);
QString num_name=item.num_name;
QString subFcParaName=item.subFcParaName;
double workMin=item.workMin;
double workMax=item.workMax;
auto at= createAttributrNode(doc,num_name,num_name);
at.appendChild(createNode(doc,subFcParaName,"参数名"));
at.appendChild(createNode(doc,workMin,"workMin"));
at.appendChild(createNode(doc,workMax,"workMax"));
attribute_para.appendChild(at);
i++;
}
}
}
if(!file.open(QFile::WriteOnly|QFile::Truncate))
return;
QTextStream out_stream(&file);
doc.save(out_stream,4); //缩进4格
file.close();
}
void MainWindow::appendXml(QDomDocument &doc,QDomElement &root,QList<ConditionClass>all_condition_)
{
for(auto it:all_condition_)
{
auto fcParaName=it.fcParaName;
auto earlyMin= it.earlyMin;
auto earlyMax= it.earlyMax;
auto alarmMax= it.alarmMax;
auto alarmMin= it.alarmMin;
auto main_para= createAttributrNode(doc,fcParaName,"主参数");
root.appendChild(main_para);
main_para.appendChild(createNode(doc,earlyMin,"earlyMin"));
main_para.appendChild(createNode(doc,earlyMax,"earlyMax"));
main_para.appendChild(createNode(doc,alarmMax,"alarmMax"));
main_para.appendChild(createNode(doc,alarmMin,"alarmMin"));
if(!it.attached_contidition_.isEmpty())
{
auto attribute_para=createAttributrNode(doc,"附属","附属");
main_para.appendChild(attribute_para);
for(auto item:it.attached_contidition_)
{
int i=0;
//QString attribute_para=tr("附属")+QString::number(i);
QString num_name=item.num_name;
QString subFcParaName=item.subFcParaName;
double workMin=item.workMin;
double workMax=item.workMax;
auto at= createAttributrNode(doc,num_name,num_name);
at.appendChild(createNode(doc,subFcParaName,subFcParaName));
at.appendChild(createNode(doc,workMin,"workMin"));
at.appendChild(createNode(doc,workMax,"workMax"));
attribute_para.appendChild(at);
i++;
}
}
}
}
/**
* @brief 创建属性节点
* @param
* @param
*/
QDomElement MainWindow::createAttributrNode(QDomDocument &doc,QString attribute_name,QString node_name)
{
QDomElement it = doc.createElement(node_name);
it.setAttribute(node_name,attribute_name);
return it;
}
/**
* @brief 创建节点
* @param
* @param
*/
QDomElement MainWindow::createNode(QDomDocument &doc,QString value,QString node_name)
{
QDomElement it = doc.createElement(node_name);
QDomText text_2 = doc.createTextNode(value);
it.appendChild(text_2);
return it;
}
/**
* @brief 创建节点
* @param
* @param
*/
QDomElement MainWindow::createNode(QDomDocument &doc,double value,QString node_name)
{
QDomElement it = doc.createElement(node_name);
QDomText text_2 = doc.createTextNode(QString::number(value));
it.appendChild(text_2);
return it;
}