Qt实现配置文件读写操作的示例详解

#include <QSettings>
 
void saveNetworkConfig() {
    QSettings settings("network.ini", QSettings::IniFormat);
 
    // 网络配置分组
    settings.beginGroup("Network");
 
    // 源地址配置
    settings.beginGroup("Source");
    settings.setValue("IP", "192.168.1.100");
    settings.setValue("Port", 5000);
    settings.endGroup(); // 结束 Source 分组
 
    // 目标地址配置
    settings.beginGroup("Destination");
    settings.setValue("IP", "10.10.2.200");
    settings.setValue("Port", 8080);
    settings.endGroup(); // 结束 Destination 分组
 
    settings.endGroup(); // 结束 Network 分组
 
    settings.sync(); // 立即写入文件
}

#include <QSettings>
#include <QDebug>
 
void loadNetworkConfig() {
    QSettings settings("network.ini", QSettings::IniFormat);
 
    // 加载源地址配置
    settings.beginGroup("Network/Source");
    QString srcIP = settings.value("IP", "127.0.0.1").toString();
    int srcPort = settings.value("Port", 8000).toInt();
    settings.endGroup();
 
    // 加载目标地址配置
    settings.beginGroup("Network/Destination");
    QString dstIP = settings.value("IP", "0.0.0.0").toString();
    int dstPort = settings.value("Port", 80).toInt();
    settings.endGroup();
 
    // 打印结果
    qDebug() << "源地址：" << srcIP << ":" << srcPort;
    qDebug() << "目标地址：" << dstIP << ":" << dstPort;
}

#include <QCoreApplication>
#include <QSettings>
#include <QDebug>
 
int main(int argc, char *argv[]) {
    QCoreApplication a(argc, argv);
 
    // 保存配置
    saveNetworkConfig();
 
    // 加载配置
    loadNetworkConfig();
 
    return 0;
}

// 保存多个服务器配置
void saveServers() {
    QSettings settings("servers.ini", QSettings::IniFormat);
 
    QStringList servers = {"ServerA", "ServerB", "ServerC"};
    foreach (const QString &name, servers) {
        settings.beginGroup(name); // 动态生成分组名
        settings.setValue("IP", name + ".example.com");
        settings.setValue("Port", 8080);
        settings.endGroup();
    }
}
 
// 加载所有服务器
void loadServers() {
    QSettings settings("servers.ini", QSettings::IniFormat);
 
    foreach (const QString &group : settings.childGroups()) {
        settings.beginGroup(group);
        qDebug() << "服务器" << group 
                 << "=> IP:" << settings.value("IP").toString()
                 << "Port:" << settings.value("Port").toInt();
        settings.endGroup();
    }
}