log日志显示与写入文件—qt

今天药忘吃喽~ 2022-10-25 05:00 340阅读 0赞

###                                                                                                        log日志显示与写入文件—qt ###

1.显示效果

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzE1MjA0MTc5_size_16_color_FFFFFF_t_70][]

2.记录文件效果

![20210131110353864.png][]

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzE1MjA0MTc5_size_16_color_FFFFFF_t_70 1][]

#include <QFile>
    #include <QTextCodec>
    
    //绿色字体
     recv_prefix_green = "<font color='green'>         "; // 空格：“ ”
    //红色字体
        recv_prefix_red = "<font color='red'>         "; // 空格：“ ”
    
    // plc 消息日志 s设置回调函数调用
        PLCDriverInstance->driverService.setConsoleCallBack(
                [this](QString msg, QString send) {
                    show_console(msg,send);
                }
        );
    
    
    //直接调用
    //show_console("用户触发了上料09！","get");
    
    /**
     * 清除日志
     */
    void MainWindow::clear_log() {
    
        logTextEdit.clear();
    }
    
    
    /**
     * 显示日志 方法1：不支持ros打包 因为sprintf问题
     */
    
    
    void MainWindow::show_console(QString msg_log,QString send) {
        char response[120];
        time_t tt;
        char buf[50] = {0};
        char buf1[50] = {0};
        tt = time(NULL);
        strftime(buf, 50, "%y-%m-%d %H:%M:%S", localtime(&tt));
    
        sprintf(response, "[本地时间: %s ]", buf);
        if (send == "send") {//发送消息
            logTextEdit.append(recv_prefix_red + response + msg_log);
        } else if (send == "get") {//接收到消息
            logTextEdit.append(recv_prefix_green + response + msg_log);
        }
    
        QString msg1 = QString(buf);
        msg1 = "[本地时间: "+msg1+"] "+msg_log;
           // QByteArray array = msg1.toLocal8Bit();// ubuntu 下中文写入文件正常 ，windows下写入中文乱码
        QByteArray array = msg1.toUtf8(); //windows下中文输出正常，ubuntu下没测
        sprintf(response ,array);
        strftime(buf1, 50, "%y_%m_%d", localtime(&tt));
        QString logfileTimeName = QString(buf1);
        Log_Save(response,logfileTimeName);
    
    }
    
    
    /**
     * 显示日志 方法2：支持ros打包
     */
    
    void SendPoseAndgetPoseWindow::show_console2(QString msg_log,QString send) {
        char response[320];
        time_t tt;
        char buf[16] = {0};
        char buf1[16] = {0};
        tt = time(NULL);
        //清除char缓存
        memset(response, 0, 320);
        strftime(buf, 16, "%y-%m-%d %H:%M:%S", localtime(&tt));
        QString qss="[本地时间: "+QString(buf)+" ]";
        QByteArray ba = qss.toLocal8Bit();
        memcpy(response, ba.data(), ba.size());
    
        if (send == "send") {//发送消息
          logTextEdit.append(recv_prefix_red + response + msg_log);
    
        } else if (send == "get") {//接收到消息
            logTextEdit.append(recv_prefix_green + QString(response) + msg_log);
    
        }
    
         QString msg1 = QString(buf);
          msg1 = "[本地时间: "+msg1+"] "+msg_log;
          QByteArray array = msg1.toLocal8Bit();
           memcpy(response, array.data(), array.size());
           strftime(buf1, 16, "%y_%m_%d", localtime(&tt));
           QString logfileTimeName = QString(buf1);
    
          // Log_Save(response,logfileTimeName);
    
    }
    
    
    
    /**
     * 保存日志
     * showLog1
     */
    void MainWindow::Log_Save(const char*str,QString logfileTimeName)
    {
    
    
        QString OutTxt(str);
        // QString filepath1="/home/jsno/Log_robot/"+logfileTimeName+"A.txt";
        //  QString filepath2="/home/jsno/Log_robot/"+logfileTimeName+"B.txt";
    
       QString filepath1="/home/demo/Log_robot/"+logfileTimeName+"A.txt";
        QString filepath2="/home/demo/Log_robot/"+logfileTimeName+"B.txt";
    //    QString filepath1="E:/Log_robot/"+logfileTimeName+"A.txt";
    //    QString filepath2="E:/Log_robot/"+logfileTimeName+"B.txt";
        QFile outFile1((filepath1));
        QFile outFile2((filepath2));
        outFile1.open(QIODevice::WriteOnly | QIODevice::Append);
        if(outFile1.size() >= 1024*100)
        {
            outFile1.close();
            outFile2.remove();
            QFile::copy((filepath1),(filepath2));
            outFile1.remove();
            QFile outFile3((filepath1));
            outFile3.open(QIODevice::WriteOnly | QIODevice::Append);
            QTextStream ts(&outFile3);
            ts.setCodec(QTextCodec::codecForName("UTF-8"));
            ts << OutTxt << endl;
        }
        else
        {
            QTextStream ts(&outFile1);
            ts.setCodec(QTextCodec::codecForName("UTF-8"));
            ts << OutTxt << endl;
        }
    
    }

# c++日志： #

/*日志记录*/
    #include <stdio.h>
    #include <stdlib.h>
    #include <time.h>
    #include <unistd.h>
    #include <assert.h>
    #include <string.h>
    #include <string>
    #include <fcntl.h>
    #include <stdarg.h>
    #include <memory.h>
    
    
    
    enum switch_mode
    {
        mode_minute,
        mode_hour,
        mode_day,
        mode_month
    };
    using namespace std;
    int file_fd = -1;
    int log_file(switch_mode mode = mode_day)
    {
        char file_path[512] = {0};
        char filetime[32] = {0};
        struct tm tm_time;
        time_t t_log;
        std::string log_time = "";
        std::string home = getenv("HOME");
        std::string log_file_path = home + "/data/log/";
        const char *str = log_file_path.c_str();
        cout<<"log_file_path"<<log_file_path<<endl;
        cout<<"file_path"<<file_path<<endl;
        // urData结构体中的int数据 MsgSize四个字节;  把4个字节的数据拷贝到int类型的MsgSize中; pdata的char数组中有很多数据
        memcpy(&file_path, str, sizeof(log_file_path));
        cout<<"file_path"<<file_path<<endl;
        cout<<"sizeof(log_file_path)"<<sizeof(log_file_path)<<endl;
    //    assert(getcwd(file_path, 512) != NULL);    //当前目录
    //    if (file_path[strlen(file_path) - 1] != '/') {
    //        file_path[strlen(file_path)] = '/';
    //    }
        cout<<"file_path"<<file_path<<endl;
        if(access(file_path, F_OK) != 0) {     //目录不存在
            std::string build_path ="mkdir -p ";
            build_path += file_path;
            cout<<"build_path"<<build_path<<endl;
            assert(system(build_path.c_str()) !=0 );
            cout<<"build_path"<<build_path<<endl;
        }
        cout<<"file_path"<<file_path<<endl;
        t_log = time(NULL);
        localtime_r(&t_log, &tm_time);
        strftime(filetime, sizeof(filetime), "%Y%m%d%H%M%S", &tm_time); //日志的时间
        switch(mode) {  //日志存储模式
            case mode_minute:
                log_time.assign(filetime, 0, 12);
                break;
            case mode_hour:
                log_time.assign(filetime, 0, 10);
                break;
            case mode_day:
                log_time.assign(filetime, 0, 8);
                break;
            case mode_month:
                log_time.assign(filetime, 0, 6);
                break;
            default:
                log_time.assign(filetime, 0, 8);
        }
        strcat(file_path, "log_");
        strcat(file_path, log_time.c_str());
        strcat(file_path, ".log");
    
        file_fd = open(file_path, O_RDWR|O_CREAT|O_APPEND, 0666);
        assert(file_fd != -1);
        return 0;
    }
    void write_cmd(const char *fmt,...)
    {
        va_list ap;
        va_start(ap,fmt);
        vprintf(fmt,ap);
        va_end(ap);
    }
    int write_log(const char *msg, ...)
    {
        char final[2048] = {0};   //当前时间记录
        va_list vl_list;
        va_start(vl_list, msg);
        char content[1024] = {0};
        vsprintf(content, msg, vl_list);   //格式化处理msg到字符串
        va_end(vl_list);
    
        time_t  time_write;
        struct tm tm_Log;
        time_write = time(NULL);        //日志存储时间
        localtime_r(&time_write, &tm_Log);
        strftime(final, sizeof(final), "[%Y-%m-%d %H:%M:%S] ", &tm_Log);
    
        strncat(final, content, strlen(content));
        assert(msg != NULL && file_fd != -1);
        assert( write(file_fd, final, strlen(final)) == strlen(final));
        return 0;
    }
    void close_file()
    {
        close(file_fd);
    }
    
    
    int main(int argc, char *argv[]) {
    
    
    //    Log *log=new Log("1.log",true);
        try{
        //   lg::run_log << "log_information1 here" << "\n";
    //        lg::run_log << "/***log_information1 here***/ "<< "\n";
    
            log_file();
            write_cmd("the address for cmd:%d\n", 100);
            write_log("the address for log:%d\n", 200);
            close_file();
        }catch (exception e){
    
        }

地址：

[https://blog.csdn.net/oXiaoErBuYu123456/article/details/60869392?ops\_request\_misc=%25257B%252522request%25255Fid%252522%25253A%252522161317357916780269823739%252522%25252C%252522scm%252522%25253A%25252220140713.130102334.pc%25255Fall.%252522%25257D&request\_id=161317357916780269823739&biz\_id=0&utm\_medium=distribute.pc\_search\_result.none-task-blog-2~all~first\_rank\_v2~rank\_v29-9-60869392.first\_rank\_v2\_pc\_rank\_v29&utm\_term=c%252B%252B+%25E8%25AE%25B0%25E5%25BD%2595%25E6%2597%25A5%25E5%25BF%2597][https_blog.csdn.net_oXiaoErBuYu123456_article_details_60869392_ops_request_misc_25257B_252522request_25255Fid_252522_25253A_252522161317357916780269823739_252522_25252C_252522scm_252522_25253A_25252220140713.130102334.pc_25255Fall._252522_25257D_request_id_161317357916780269823739_biz_id_0_utm_medium_distribute.pc_search_result.none-task-blog-2_all_first_rank_v2_rank_v29-9-60869392.first_rank_v2_pc_rank_v29_utm_term_c_252B_252B_25E8_25AE_25B0_25E5_25BD_2595_25E6_2597_25A5_25E5_25BF_2597]

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[20210131110353864.png]: /images/20221024/23bc5cd5bc70439fa56291eb5e6840cb.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzE1MjA0MTc5_size_16_color_FFFFFF_t_70 1]: /images/20221024/a302c5874cae4625831ff9767d209138.png
[https_blog.csdn.net_oXiaoErBuYu123456_article_details_60869392_ops_request_misc_25257B_252522request_25255Fid_252522_25253A_252522161317357916780269823739_252522_25252C_252522scm_252522_25253A_25252220140713.130102334.pc_25255Fall._252522_25257D_request_id_161317357916780269823739_biz_id_0_utm_medium_distribute.pc_search_result.none-task-blog-2_all_first_rank_v2_rank_v29-9-60869392.first_rank_v2_pc_rank_v29_utm_term_c_252B_252B_25E8_25AE_25B0_25E5_25BD_2595_25E6_2597_25A5_25E5_25BF_2597]: https://blog.csdn.net/oXiaoErBuYu123456/article/details/60869392?ops_request_misc=%25257B%252522request%25255Fid%252522%25253A%252522161317357916780269823739%252522%25252C%252522scm%252522%25253A%25252220140713.130102334.pc%25255Fall.%252522%25257D&request_id=161317357916780269823739&biz_id=0&utm_medium=distribute.pc_search_result.none-task-blog-2~all~first_rank_v2~rank_v29-9-60869392.first_rank_v2_pc_rank_v29&utm_term=c%252B%252B+%25E8%25AE%25B0%25E5%25BD%2595%25E6%2597%25A5%25E5%25BF%2597