QT读取身份证信息

使用的是华视的读卡器，先去官网（http://www.chinaidcard.com/）下载读卡二次开发SDK，里边有二次开发的说明文档和示例，复制termb.dll 、sdtapi.dll、WltRs.dll等到程序路径下。使用 QLibrary 从 termb.dll 加载身份证读取相关的函数。
代码：
.h

#ifndef BP_READCARD_H#define BP_READCARD_H#include <QObject>#include <QLibrary>#include <QDebug>typedef int __stdcall (*CVR_InitComm)(int);                  //初始化typedef int __stdcall (*CVR_Authenticate)();                  //卡认证typedef int __stdcall (*CVR_Read_FPContent)();                //读卡typedef int __stdcall (*CVR_GetPeopleName)(char *,int &);    //获取姓名typedef int __stdcall (*CVR_GetPeopleIDCode)(char *,int &);  //获取身份证号typedef int __stdcall (*CVR_CloseComm)();                    //关闭链接//身份证信息struct stu_card_info{    QString name;    QString ID;};class ReadCard:public QObject{    Q_OBJECTpublic:    ReadCard();    ~ReadCard();    bool init_cvr();private:    bool read_card_info();    bool load_function();signals:    void read_finished(stu_card_info info);    void read_error();private slots:    void read_card();private:    //身份证读取函数指针    CVR_InitComm        func_cvr_InitComm      {nullptr};    CVR_Authenticate    func_cvr_Authenticate  {nullptr};    CVR_Read_FPContent  func_cvr_Read_FPContent {nullptr};    CVR_GetPeopleName    func_cvr_GetPeopleName  {nullptr};    CVR_GetPeopleIDCode  func_cvr_GetPeopleIDCode{nullptr};    CVR_CloseComm        func_cvr_CloseComm      {nullptr};    //读取身份证的缓冲区    char                m_buf[40];    int                  m_buf_size = 40;    stu_card_info        m_info;};#endif // BP_READCARD_H

.cpp

#include "bp_readcard.h"#include <QFile>ReadCard::ReadCard(){}ReadCard::~ReadCard(){    if(func_cvr_CloseComm)        func_cvr_CloseComm();}//加载dll中的函数指针bool ReadCard::load_function(){    func_cvr_InitComm      = {nullptr};    func_cvr_Authenticate  = {nullptr};    func_cvr_Read_FPContent = {nullptr};    func_cvr_GetPeopleName  = {nullptr};    func_cvr_GetPeopleIDCode= {nullptr};    func_cvr_CloseComm      = {nullptr};    qRegisterMetaType<stu_card_info>("stu_card_info");    QLibrary lib("termb.dll");    if(lib.load())                      //加载身份证读取库中的函数    {        func_cvr_InitComm = (CVR_InitComm)lib.resolve("CVR_InitComm");        if(!func_cvr_InitComm)            qDebug()<<"CVR_InitComm 解析失败"<<lib.errorString();        func_cvr_GetPeopleName = (CVR_GetPeopleName)lib.resolve("GetPeopleName");        if(!func_cvr_GetPeopleName)            qDebug()<<"CVR_GetPeopleName 解析失败"<<lib.errorString();        func_cvr_GetPeopleIDCode = (CVR_GetPeopleIDCode)lib.resolve("GetPeopleIDCode");        if(!func_cvr_GetPeopleIDCode)            qDebug()<<"CVR_GetPeopleIDCode 解析失败"<<lib.errorString();        func_cvr_Authenticate = (CVR_Authenticate)lib.resolve("CVR_Authenticate");        if(!func_cvr_Authenticate)            qDebug()<<"CVR_Authenticate 解析失败"<<lib.errorString();        func_cvr_Read_FPContent = (CVR_Read_FPContent)lib.resolve("CVR_Read_FPContent");        if(!func_cvr_Read_FPContent)            qDebug()<<"CVR_Read_FPContent 解析失败"<<lib.errorString();        func_cvr_CloseComm = (CVR_CloseComm)lib.resolve("CVR_CloseComm");        if(!func_cvr_CloseComm)            qDebug()<<"CVR_CloseComm 解析失败"<<lib.errorString();    }    else      qDebug()<<"termb.dll load faild."<<lib.errorString();    return (func_cvr_InitComm && func_cvr_Authenticate && func_cvr_Read_FPContent && func_cvr_GetPeopleName && func_cvr_GetPeopleIDCode && func_cvr_CloseComm);}//初始化bool ReadCard::init_cvr(){    if(!load_function())    //加载函数失败        return false;    int iPort, iRetUSB = 0, iRetCOM = 0;    for (iPort = 1001; iPort <= 1004; iPort++)  //USB    {        iRetUSB = func_cvr_InitComm(iPort);        if (iRetUSB == 1)            break;    }    if (iRetUSB != 1)    {        for (iPort = 1; iPort <= 4; iPort++)    //port        {            iRetCOM = func_cvr_InitComm(iPort);            if (iRetCOM == 1)                break;        }    }    if ((iRetCOM == 1) || (iRetUSB == 1))        return true;    return false;}//读卡姓名身份证号bool ReadCard::read_card_info(){    if(func_cvr_Read_FPContent() == 1)    {        memset(m_buf,0,m_buf_size);        if(1 == func_cvr_GetPeopleName(m_buf,m_buf_size))        {            m_info.name = QString::fromLocal8Bit(m_buf);            memset(m_buf,0,m_buf_size);            if(1 == func_cvr_GetPeopleIDCode(m_buf,m_buf_size))            {                m_info.ID = m_buf;                emit read_finished(m_info);                //删除读取身份证生成的文件                QFile::remove("wz.txt");                QFile::remove("fp.dat");                QFile::remove("zp.bmp");                return true;            }        }    }    emit read_error();    return false;}//读卡，尝试读，读失败尝试认证，认证成功再读一次void ReadCard::read_card(){    if(!read_card_info())    {        if(1 == func_cvr_Authenticate())        {            read_card_info();        }    }}

使用时，调用 init_cvr 初始化成功后调用 read_card 读取身份证信息，然后接收读取完成的信号即可。读卡耗时比较久大概会有几百毫秒。