qt操作文件以及字符串转换

//从文件加载英文属性与中文属性对照表

QFile file(":/propertyname.txt");

if (file.open(QFile::ReadOnly)) {

//QTextStream方法读取速度至少快百分之30

#if 0

while(!file.atEnd()) {

QString line = file.readLine();

appendName(line);

}

#else

QTextStream in(&file);

while (!in.atEnd()) {

QString line = in.readLine();

appendName(line);

}

#endif

file.close();

}

Qt|将QString字符串写入文件中

void writeFile(const QString str)

{

QFile file;

file.setFileName("./log.txt");

//只写 追加写入

if(file.open(QIODevice::WriteOnly|QIODevice::Text|QIODevice::append))

{

QTextStream in(&file);

in<<str<<endl;

}

file.close();

}

String和QString之间的转化

QString qstr;

string str;

str = qstr.toStdString();

qstr = QString::fromStdString(str);