按键录制+文件写入_记录键盘操作写入txt-优快云博客

本文链接：https://blog.youkuaiyun.com/qq_39446329/article/details/136771728

本文详细描述了一个使用C++编写的Windows系统低级键盘钩子程序，可以记录按键的按下和弹起时间，将数据保存到keyboard_log.txt文件中。

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// 非常完美 显示和写入都有 时间也都正确
#include <iostream>  
#include <fstream>  
#include <windows.h>  

// 钩子回调函数  
LRESULT CALLBACK LowLevelKeyboardProc(int nCode, WPARAM wParam, LPARAM lParam) {
    KBDLLHOOKSTRUCT* pKeyboardStruct = reinterpret_cast<KBDLLHOOKSTRUCT*>(lParam);
    static bool isPressed[256] = { false }; // 用于跟踪按键是否被按下  
    static ULONGLONG lastPressTime[256] = { 0 }; // 上一次按键按下的时间戳  
    std::ofstream outputFile("keyboard_log.txt", std::ios_base::app); // 打开文件以追加模式  
    //std::ofstream outputFile("keyboard_log.txt", std::ios_base::out | std::ios_base::trunc); // 打开文件并清空内容
    if (nCode == HC_ACTION) {
        switch (wParam) {
        case WM_KEYDOWN:
            if (!isPressed[pKeyboardStruct->vkCode]) {
                isPressed[pKeyboardStruct->vkCode] = true;
                lastPressTime[pKeyboardStruct->vkCode] = GetTickCount64(); // 记录按键按下的时间戳  
                  std::cout << lastPressTime[pKeyboardStruct->vkCode] <<" " << (char)pKeyboardStruct->vkCode << " 按下" << std::endl;
                outputFile << lastPressTime[pKeyboardStruct->vkCode] << " " << (char)pKeyboardStruct->vkCode << " 按下" << std::endl;
            }
            break;
        case WM_KEYUP:
            if (isPressed[pKeyboardStruct->vkCode]) {
                isPressed[pKeyboardStruct->vkCode] = false;
                ULONGLONG ls = GetTickCount64(); // 记录按键按下的时间戳  
                ULONGLONG pressDuration = ls - lastPressTime[pKeyboardStruct->vkCode];
                std::cout << ls<<" "<<(char)pKeyboardStruct->vkCode << " 弹起 " << pressDuration << "ms" << std::endl;
             outputFile << ls << " " << (char)pKeyboardStruct->vkCode << " 弹起 " << pressDuration << "ms" << std::endl;
                outputFile.close(); // 关闭文件  
            }
            break;
        }
    }
    return CallNextHookEx(NULL, nCode, wParam, lParam);
}

int main() {
    // 在程序开始时清空文件内容  
    std::ofstream outputFile("keyboard_log.txt", std::ios_base::out | std::ios_base::trunc);
    if (!outputFile.is_open()) {
        std::cerr << "Failed to open the file for clearing!" << std::endl;
        return 1;
    }
    outputFile.close(); // 关闭文件，确保内容被清空  

    HHOOK hHook = SetWindowsHookEx(WH_KEYBOARD_LL, LowLevelKeyboardProc, GetModuleHandle(NULL), 0);
    if (hHook == NULL) {
        std::cerr << "Failed to set hook!" << std::endl;
        return 1;
    }

    MSG msg;
    while (GetMessage(&msg, NULL, 0, 0)) {
        TranslateMessage(&msg);
        DispatchMessage(&msg);
    }

    UnhookWindowsHookEx(hHook);
    return 0;
}```