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C++ 调用js 脚本

news 2025/7/2 1:53:25

需求：

使用Qt/C++ 调用js 脚本。Qt 调用lua 脚本性能应该是最快的，但是需要引入第三方库，虽然也不是特别麻烦，但是调用js脚本，确实内置的功能（C++ 调用lua 脚本-CSDN博客）

步骤：

1，pro 引入

QT+= core  qml

2，调用js 脚本

#include <QCoreApplication>
#include <QtQml/QJSEngine>
#include <QtQml/QJSValue>
#include <QFile>
#include <QTextStream>
#include <QDebug>int main(int argc, char *argv[])
{QCoreApplication a(argc, argv);QJSEngine jsEngine;QFile scriptFile("my.js");if (scriptFile.open(QIODevice::ReadOnly | QIODevice::Text)) {QTextStream stream(&scriptFile);QString scriptCode = stream.readAll();jsEngine.evaluate(scriptCode);//调用js 函数 并传递参数QJSValue addFunction = jsEngine.globalObject().property("process");if (addFunction.isCallable()) {//16进制原始数据QJSValueList args;args << "1245";QJSValue result = addFunction.call(args);if (result.isString()) {QString re = result.toString();qDebug() << "Result of process function: " << re;} else {qDebug() << "Error: process function did not return a valid string.";}} else {qDebug() << "Error: 'process' function not found.";}scriptFile.close();} else {qDebug() << "Error: Unable to open the script file.";}return a.exec();
}

3，js 脚本编写

function process(data){var temStr = data.substring(0, 2)var humStr = data.substring(2,4)var temInt = parseInt(temStr,16)var humInt = parseInt(humStr,16)var re = "temperature:"+temInt.toString()+ " hum:"+humInt.toString()return re}

4，效果