Qt QProcessEnvironment::systemEnvironment() - 获取系统环境变量

The "QProcessEnvironment::systemEnvironment()" function is a static function that returns the environment variables of the system as a "QProcessEnvironment" object. The "QProcessEnvironment" class provides an interface for accessing and manipulating the environment variables of a process.

Here is an example usage of "QProcessEnvironment::systemEnvironment()":

QProcessEnvironment environment = QProcessEnvironment::systemEnvironment();
QStringList keys = environment.keys();

foreach (const QString &key, keys) {
    qDebug() << key << \": \" << environment.value(key);
}

This code retrieves the system environment variables, then iterates over them and prints each key-value pair using "qDebug()".