xml and txt format

时间：2009-07-22 来源：fewlife

by tangke <[email protected]> 2009-06-28
#include <QtXml/QDomProcessingInstruction>
#include <QtXml/QDomElement>
#include <QtXml/QDomDocument>
#include <QtCore/QCoreApplication>
#include <QtCore/QFile>
#include <QtCore/QObject>
#include <QtCore/QTextStream>
#include <QtCore/QtDebug>
void read()
{
   QDomDocument doc;
   QFile file("out.txt");
   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
       return;
   }
   QDomNodeList list = doc.childNodes();
   for(int i = 0;i < list.count();i ++){
       QDomNode node=list.at(i);//好的风格当然是把定义写在外面:(
       qDebug()<<node.hasChildNodes();
       qDebug()<<"node name is "<<node.nodeName();
       qDebug()<<"node type is "<<node.nodeType();
   }
}
void save()
{
   QDomDocument doc;
   QDomProcessingInstruction instruction;
   instruction =
       doc.createProcessingInstruction("xml","version=\"1.0\" encoding=\"UTF-8\"");
   doc.appendChild(instruction);
   QDomElement root = doc.createElement("person");
   doc.appendChild(root);
   QDomElement kgl_input = doc.createElement("io");
   root.appendChild(kgl_input);
   QDomAttr name = doc.createAttribute("name");
   QDomAttr type = doc.createAttribute("type");
   name.setValue(QObject::tr("zhangsan"));
   type.setValue(QObject::tr("90"));
   kgl_input.setAttributeNode(name);
   kgl_input.setAttributeNode(type);
   QFile file("out.txt");
   if (!file.open(QIODevice::WriteOnly | QIODevice::Text))
       return ;
   QTextStream out(&file);
   out.setCodec("UTF-8");
   doc.save(out,4,QDomNode::EncodingFromTextStream);
}
int main(int argc, char **argv)
{
   QCoreApplication a(argc, argv);
   save();
   read();
   return a.exec();
}

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