QTextStream的使用

#include <QCoreApplication>
#include <QTextStream7gt;
#include <QFile>
#include <QDebug7gt;

void write()
{
QFile file("C:/Test/simple.txt");
if(file.open(QIODevice::WriteOnly | QIODevice::Text))
{
// We're going to streaming text to the file
QTextStream stream(&file);

stream << "Debussy\n";
stream << "Rabel\n";

file.close();
qDebug() << "Writing finished";
}
}

void read()
{
QFile file("C:/Test/simple.txt");
if(file.open(QIODevice::ReadOnly|QIODevice::Text))
{
// We're going to streaming the file
// to the QString
QTextStream stream(&file);

QString line;
do {
line = stream.readLine();
qDebug() << line;
} while(!line.isNull());

file.close();
qDebug() << "Reading finished";
}

}

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

write();
read();

return a.exec();
}

Output:

Writing finished
"Debussy"
"Rabel"
""
Reading finished

It's also common to use QTextStream to read console input and write console output. QTextStream is locale aware, and will automatically decode standard input using the correct codec. Example:

QTextStream stream(stdin);
QString line;
do {
line = stream.readLine();
} while (!line.isNull());