QString拆分返回空字符串列表

Question

Using this regex B([^.]*)E I am trying to get all the characters between B and E from

B23432|234|24EB23432|2834|234EB23432|2134|234E

Using Qt4.8

QRegExp rx("B([^.]*)E");
rx.setMinimal(true);
QString str = "B23432|234|24EB23432|2834|234EB23432|2134|234E";
QStringList list;
list = str.split(rx);
qDebug() << list;

it prints a list of empty strings. Shouldn't it return all the strings between B and E ?

Answer 1

The main issue is that you are trying to split, but in fact you need to find all matches in a loop and get capturedTexts()[1] s (or cap(1) s).

QRegExp rx("B([^E]*)E");
rx.setMinimal(true);
QString str = "B23432|234|24EB23432|2834|234EB23432|2134|234E";
QStringList list;
int pos = 0;

while ((pos = rx.indexIn(str, pos)) != -1) {
    list << rx.cap(1);
    pos += rx.matchedLength();
}
qDebug() << list;

Answer 2

This works as well. If there is something wrong with this please let me know.

QRegExp rx("[B(.*)E]");
rx.setMinimal(true);
QString str = "B23432|234|24EB23432|2834|234EB23432|2134|234E";
QStringList list;
list = str.split(rx, QString::SkipEmptyParts);
qDebug() << list;