一、使用场景

        假设一:目前有一个项目记录数据是采用sqlite文件存储的,数据量很大,里面的记录数据客户需要将其导入到execl中进行报表编辑及汇报工作;

        假设二:用户手里有点表配置表格,需要导入到工程的sqlite配置文件中给应用程序使用,配量很大。

二、实现设计

        在sqlite数据库文件读写方面,基于QT插件库提供的QSQLiteDriverPlugin实现数据库打开、读写、查询等操作。

        

bool executeSQL(QSqlDatabase db,QString _sql)
{
	QSqlQuery query(db);
    return query.exec(_sql);
};

bool checkTable(QSqlDatabase db, QString _table)
{
    QString _sql = QString("select count(*) from sqlite_master where type='table' and name='%1'").arg(_table);
    QSqlQuery query(db);
    query.exec(_sql);
    bool _existTable = true;
    if (query.next())
    {
        int _countTable = query.value(0).toInt();
        if (1!=_countTable)
        {
            _existTable = false;
        }
    }else{
        _existTable = false;
    }
    return _existTable;
};

bool opendb(QSqlDatabase &db, QString _dbn,QString _dbLink)
{
    QString dbv = "QSQLITE";
    // QString _dbLink = "db_sqlite_record";
    if (QSqlDatabase::contains(_dbLink))
    {
		db = QSqlDatabase::database(_dbLink);
    }else{
    	db = QSqlDatabase::addDatabase(dbv,_dbLink);
    }
	// checkDBLink(_dbLink);
	// db = QSqlDatabase::addDatabase(dbv,_dbLink);
    db.setDatabaseName(_dbn);

    if (db.open())
    {
        return true;
    }else{
        qDebug() << "open db failed!"<< "---"<< db.lastError().text()<<" \n";
        return false;
    }
};

bool checkdb_etconf(QSqlDatabase &db, QString _dbn)
{
	if (!opendb(db,_dbn,"db_sqlite_etconf"))
	{
		return false;
	}else{
		if(!executeSQL(db,"PRAGMA synchronous = OFF"))
		{
			qDebug() << db.lastError() << "\n";
		}
	}
    //注意,这里进行表过滤,只获取我们需要的表格
	if(!checkTable(db,"s101yc"))
	{
		return false;
	}
	if(!checkTable(db,"s101yx"))
	{
		return false;
	}
	if(!checkTable(db,"s101yk"))
	{
		return false;
	}
	if(!checkTable(db,"s101yt"))
	{
		return false;
	}
	return true;
};

        在针对csv(XLS 工作表)的文件读写方面,是基于QFile实现的FileQt类封装实现csv文件的有序读取、写入等操作。同时支持直接的.xls文件操作.

//QString _div为csv文件中每行的分割符,QVector<QVector<QString> > &_lists为读取的数据信息,采用二元数组存储行、列数据
bool readToVector(QString _file,QVector<QVector<QString> > &_lists, QString _div)
{
	QFile file(_file);
    if (!file.open(QFile::ReadOnly)) {
    	qDebug() << "conn't open file  " << _file << "!\n";
        return false;
    }else{
        QTextStream stream( &file );
        QString line;
        while ( !stream.atEnd() ) {
            line = stream.readLine();
            QStringList _strL = line.split(QRegExp(_div));
            // QStringList _strL = line.split(QRegExp(_div),QString::SkipEmptyParts);
            QVector<QString> _onev;
            for (int i = 0; i < _strL.size(); i++)
            {
            	_onev.push_back(_strL[i]);
            }
            _lists.push_back(_onev);
        }
        file.close();

        if (_lists.empty())
    	{
    		return false;
    	}else{
    		return true;
    	}
    }
}

bool writeListInfo(QVector<QString> list,const QString path,bool appendf)
{
    QFile f(path);
    if(!f.open(QFile::WriteOnly | QFile::Text | (appendf?QFile::Append:QFile::Truncate)))
        return false;

    QTextStream out(&f);

    // out.setCodec("UTF-8"); //中文编码
    for (int i = 0; i < list.size(); i++)
    {
        out << QString(list[i]);
    }
    f.close();
    return true;
};

/*
*这类函数的意义主要是csv文件里面只有数据,转存到sqlite数据文件中,需要构建表格,就是需要指定表格
*的表名、列名,表名采用csv文件名来表示,列名需要额外指定,本文直接硬代码实现,当然也可以在csv文件
*里面的第一列增加列名,在程序处理时先读取第一列,进行列名命名,在进行转换导入。
*/
void inYx(QSqlDatabase &db,QString _path)
{
	QVector<QVector<QString> > _lists;
	readToVector(_path,_lists,",");

	QSqlQuery query(db);
	query.exec("DELETE FROM s101yx");

	QVariantList indexids;
	QVariantList devids;
	QVariantList names;
	QVariantList localaddrs;
	QVariantList nots;
	QVariantList sampdevids;
	QVariantList sampaddrs;
	QVariantList nametomsts;

	int _count = 0;
	QString _sql = "INSERT INTO s101yx (INDEXID,DEVID,NAME,LOCALADDR,\"NOT\",SAMPDEVID,SAMPADDR,NAMETOMST) "
			       "VALUES (?,?,?,?,?,?,?,?)";

	for (int i = 0; i < _lists.size(); i++)
	{
		if (8!=_lists[i].size())
		{
			continue;
		}
		indexids << _lists[i][0].toInt();
		devids << _lists[i][1].toInt();
		names << _lists[i][2];
		// names << QString("%1").arg(_lists[i][2].toAscii().data());
		localaddrs << _lists[i][3].toInt();
		nots << _lists[i][4].toInt();
		sampdevids << _lists[i][5].toInt();
		sampaddrs << _lists[i][6].toInt();
		nametomsts << _lists[i][7];
		// nametomsts << QString("%1").arg(_lists[i][7].toAscii().data());

		_count+=1;
		if (_count>=200||(i==(_lists.size()-1)))
		{
			try{
				query.prepare(_sql);
				query.addBindValue(indexids);
				query.addBindValue(devids);
				query.addBindValue(names);
				query.addBindValue(localaddrs);
				query.addBindValue(nots);
				query.addBindValue(sampdevids);
				query.addBindValue(sampaddrs);
				query.addBindValue(nametomsts);

				if (!query.execBatch())
				{
					qDebug() << query.lastError();
				}
			}catch(...){
				qDebug() << query.lastError();
			}
			indexids.clear();
		    devids.clear();
		    names.clear();
		    localaddrs.clear();
		    nots.clear();
		    sampdevids.clear();
		    sampaddrs.clear();
		    nametomsts.clear();

		    _count = 0;
		}
	}
};
...

        提供一个简要对话框设置数据库文件路径及csv文件路径,提供转换选择按钮实现文件数据转换输出。

void InOrOutConf::DBToCsv()
{
	QString _dbn = this->pathEdit->text();
	QFile _file(_dbn);
	if (!_file.exists())
	{
		warLabel->setText("db isn't exist!");
		return;
	}
	// s101yc * ycs = new s101yc[10];
	// int ret = GetS101yc(_dbn.toStdString().c_str(),"",ycs,10);
	// if(ret>0){
	// 	for (int i = 0; i < ret; i++)
	// 	{
	// 		qDebug() <<  QString("%1").arg(ycs[i].NAME)<<"\n";
	// 		qDebug() <<  QString("%1").arg(G2U(ycs[i].NAME))<<"\n";
	// 		qDebug() <<  QString("%1").arg(U2G(ycs[i].NAME))<<"\n";
	// 		qDebug() <<  QString("%1").arg(ASCII2UTF_8(std::string(ycs[i].NAME)).c_str())<<"\n";
	// 		qDebug() <<  QString("%1").arg(UTF_82ASCII(std::string(ycs[i].NAME)).c_str())<<"\n";
	// 	}
	// }

	QSqlDatabase db;
	if(!checkdb_etconf(db,_dbn))
	{
		warLabel->setText("db isn't table we need!");
		return;
	}
	warLabel->setText("db to csv runing!");
    //这里本应通过读取表名(或配置实现)+路径来命名csv文件路径的,本案例测试时,强行指定文件名
	outYc(db,this->dirEdit->text()+divPath+"s101yc.csv");
	outYx(db,this->dirEdit->text()+divPath+"s101yx.csv");
	outYk(db,this->dirEdit->text()+divPath+"s101yk.csv");
	outYt(db,this->dirEdit->text()+divPath+"s101yt.csv");
	warLabel->setText("db to csv finish!");
	db.close();
};

void InOrOutConf::scvToDB()
{
	QString _dbn = this->pathEdit->text();
	QFile _file(_dbn);
	if (!_file.exists())
	{
		warLabel->setText("db isn't exist!");
		return;
	}

	QSqlDatabase db;
	if(!checkdb_etconf(db,_dbn))
	{
		warLabel->setText("db isn't table we need!");
		return;
	}
	warLabel->setText("csv to db runing!");
    //这里本应通过配置定义+路径来读取csv文件,本案例测试时,强行指定文件名
	inYc(db,this->dirEdit->text()+divPath+"s101yc.csv");
	inYx(db,this->dirEdit->text()+divPath+"s101yx.csv");
	inYk(db,this->dirEdit->text()+divPath+"s101yk.csv");
	inYt(db,this->dirEdit->text()+divPath+"s101yt.csv");
	warLabel->setText("csv to db finish!");
	db.close();
};

  三、工程实现

        本文采用qt5.8来实现的,并对该版本进行了静态编译,win系统是win10-64bit,linux系统是centos7-64bit系统,同时静态编译了plugins\\sqldrivers插件。

        整个工程目录结构如下:

sqlite_and_csv_trans
    bin
    file
        FileQt.h
        FileQt.cpp
        myfiledialog.h
        myfiledialog.cpp
        strcode.hpp
        strcode.cpp
    languages
        dbInOrOut_cn.qm
        dbInOrOut_cn.ts
    view
        inOrOutConf.h
        inOrOutConf.cpp
    dbInOrOut.qrc
    dbIntOrOut.pro
    main.cpp

 dbIntOrOut.pro:

QT      += core
QT      += gui
QT      += sql

greaterThan(QT_MAJOR_VERSION, 4) {
    QT += printsupport
    QT += concurrent
    QT += widgets
}

TEMPLATE = app
DESTDIR = bin

CONFIG += qt warn_on debug_and_release
CONFIG += static

CONFIG(debug, debug|release) {
    TARGET          = dbInOrOutd
    OBJECTS_DIR     = debug/obj
    MOC_DIR         = debug/moc
    CONFIG          += console
    DEFINES         += _DEBUG
}else{
    TARGET          = dbInOrOut
    OBJECTS_DIR     = release/obj
    MOC_DIR         = release/moc
    DEFINES         += NODEBUG
}

DEFINES +=  QTWIN_32 \
        QT_CORE_LIB \
        QT_GUI_LIB \
        QT_SQL_LIB \
        QT_THREAD_SUPPORT
#请指定qt的sqlite插件路径
QT_SQL = D:\\workForSoftware\\Qt\\Qt5.8.0\\5.8\\msvc2015_64_static\\plugins\\sqldrivers

win32{
    CONFIG(debug, debug|release) {
        LIBS             += $$(QT_SQL)\\qsqlited.lib
    } else {
        LIBS             += $$(QT_SQL)\\qsqlite.lib
    }
}
HEADERS  += view/inOrOutConf.h \
		file/myfiledialog.h \
		file/strcode.hpp \


SOURCES += main.cpp\
    view/inOrOutConf.cpp \
    file/myfiledialog.cpp \
    file/strcode.cpp \


TRANSLATIONS += languages/dbInOrOut_cn.ts
RESOURCES += dbInOrOut.qrc

dbInOrOut.qrc

<RCC version="1.0">
    <qresource prefix="/">
        <file>languages/dbInOrOut_cn.qm</file>
    </qresource>
</RCC>

strcode.hpp,实现字符编码转换

#if _MSC_VER > 1000
#pragma once
#endif // _MSC_VER > 1000

#ifndef STRCODE_HPP
#define STRCODE_HPP

#include <string>
#ifdef WIN32
#include <windows.h>
#endif

#ifdef __linux__
int code_convert(char *from_charset,char *to_charset,char *inbuf,size_t inlen,char *outbuf,size_t outlen);
int u2g(char *inbuf,int inlen,char *outbuf,int outlen);
int g2u(char *inbuf,size_t inlen,char *outbuf,size_t outlen);
int u2a(char *inbuf,int inlen,char *outbuf,int outlen);
int a2u(char *inbuf,int inlen,char *outbuf,int outlen);
#endif

#ifdef WIN32
std::wstring Utf82Unicode(const std::string& utf8string);
std::string WideByte2Acsi(std::wstring& wstrcode);
std::wstring Acsi2WideByte(std::string& strascii);
std::string Unicode2Utf8(const std::wstring& widestring);
#endif
bool UnicodeToAnsi(wchar_t* lpString,char* szAnsi);//(in,out)
bool AnsiToUnicode(char* lpString,wchar_t* szUnicode);//(in,out) 
char* U2G(const char* utf8);
char* G2U(const char* gb2312);

std::string UTF_82ASCII(std::string &strUtf8Code);
std::string ASCII2UTF_8(std::string& strAsciiCode);
//using namespace std;
bool containStr(std::string _str, std::string _strsub);

int enc_unicode_to_utf8_one(unsigned long unic, unsigned char *pOutput, int outSize);
// int enc_utf8_to_unicode_one(const unsigned char* pInput, unsigned long *Unic);
//
/*
std::string ws2s(const std::wstring& ws);
std::wstring s2ws(const std::string& s);
std::wstring UTF2Uni(const char* src, std::wstring &t);
int Uni2UTF( const std::wstring& strRes, char *utf8, int nMaxSize );
std::string s2utfs(const  std::string&  strSrc);
std::string  utfs2s(const std::string& strutf);
*/

#endif //STRCODE_HPP

strcode.cpp

#include "strcode.hpp"

#include <iostream>
#include <assert.h>
#include <stdlib.h>
#include <string.h>
#include <locale.h>
#include <stdio.h>
#include <vector>

#ifdef __linux__
#include <iconv.h> 
#endif

#ifdef __linux__
//代码转换:从一种编码转为另一种编码 
int code_convert(char *from_charset,char *to_charset,char *inbuf,size_t inlen,char *outbuf,size_t outlen) 
{ 
    iconv_t cd; 
    int rc; 
    char **pin = &inbuf; 
    char **pout = &outbuf; 

    cd = iconv_open(to_charset,from_charset); 
    if (cd==0) return -1; 
    memset(outbuf,0,outlen); 
    if (iconv(cd,pin,&inlen,pout,&outlen)==-1) return -1; 
    iconv_close(cd); 
    return 0; 
} 
//UNICODE码转为GB2312码 
int u2g(char *inbuf,int inlen,char *outbuf,int outlen) 
{ 
    return code_convert("utf-8","gb2312",inbuf,inlen,outbuf,outlen); 
} 
//GB2312码转为UNICODE码 
int g2u(char *inbuf,size_t inlen,char *outbuf,size_t outlen) 
{ 
    return code_convert("gb2312","utf-8",inbuf,inlen,outbuf,outlen); 
} 

int u2a(char *inbuf,int inlen,char *outbuf,int outlen)
{
    return code_convert("utf-8","ascii",inbuf,inlen,outbuf,outlen); 
}

int a2u(char *inbuf,int inlen,char *outbuf,int outlen)
{
    return code_convert("ascii","utf-8",inbuf,inlen,outbuf,outlen); 
}

#endif

#ifdef WIN32
//UTF-8¡ÁaUnicode
std::wstring Utf82Unicode(const std::string& utf8string)
{
	int widesize = ::MultiByteToWideChar(CP_UTF8, 0, utf8string.c_str(), -1, NULL, 0);
	if (widesize == ERROR_NO_UNICODE_TRANSLATION)
	{
		throw std::exception("Invalid UTF-8 sequence.");
	}
	if (widesize == 0)
	{
		throw std::exception("Error in conversion.");
	}

	std::vector<wchar_t> resultstring(widesize);

	int convresult = ::MultiByteToWideChar(CP_UTF8, 0, utf8string.c_str(), -1, &resultstring[0], widesize);

	if (convresult != widesize)
	{
		throw std::exception("La falla!");
	}

	return std::wstring(&resultstring[0]);
};

//unicode ¡Áa?a ascii

std::string WideByte2Acsi(std::wstring& wstrcode)
{
	int asciisize = ::WideCharToMultiByte(CP_OEMCP, 0, wstrcode.c_str(), -1, NULL, 0, NULL, NULL);
	if (asciisize == ERROR_NO_UNICODE_TRANSLATION)
	{
		throw std::exception("Invalid UTF-8 sequence.");
	}
	if (asciisize == 0)
	{
		throw std::exception("Error in conversion.");
	}
	std::vector<char> resultstring(asciisize);
	int convresult =::WideCharToMultiByte(CP_OEMCP, 0, wstrcode.c_str(), -1, &resultstring[0], asciisize, NULL, NULL);

	if (convresult != asciisize)
	{
		throw std::exception("La falla!");
	}

	return std::string(&resultstring[0]);
};
///

//ascii ¡Áa Unicode

std::wstring Acsi2WideByte(std::string& strascii)
{
	int widesize = MultiByteToWideChar (CP_ACP, 0, (char*)strascii.c_str(), -1, NULL, 0);
	if (widesize == ERROR_NO_UNICODE_TRANSLATION)
	{
		throw std::exception("Invalid UTF-8 sequence.");
	}
	if (widesize == 0)
	{
		throw std::exception("Error in conversion.");
	}
	std::vector<wchar_t> resultstring(widesize);
	int convresult = MultiByteToWideChar (CP_ACP, 0, (char*)strascii.c_str(), -1, &resultstring[0], widesize);

	if (convresult != widesize)
	{
		throw std::exception("La falla!");
	}

	return std::wstring(&resultstring[0]);
};

//Unicode ¡Áa Utf8

std::string Unicode2Utf8(const std::wstring& widestring)
{
	int utf8size = ::WideCharToMultiByte(CP_UTF8, 0, widestring.c_str(), -1, NULL, 0, NULL, NULL);
	if (utf8size == 0)
	{
		throw std::exception("Error in conversion.");
	}

	std::vector<char> resultstring(utf8size);

	int convresult = ::WideCharToMultiByte(CP_UTF8, 0, widestring.c_str(), -1, &resultstring[0], utf8size, NULL, NULL);

	if (convresult != utf8size)
	{
		throw std::exception("La falla!");
	}

	return std::string(&resultstring[0]);
};
#endif

//mbstowcs()函数和wcstombs()函数,选自CRT库。平台无关,但需设定local。不设定Local,中文会乱码
bool UnicodeToAnsi(wchar_t* lpString,char* szAnsi)//(in,out)
{
	size_t nLen=wcslen(lpString)*2;//wcslen <string.h> 
	char* lpszBuf=(char*)malloc(nLen);//malloc <stdlib.h> and <malloc.h> 
	setlocale(LC_ALL,"");
	size_t nRet=wcstombs(lpszBuf,lpString,nLen);//wcstombs <stdlib.h> 
	if(nRet<0)
	{
		free(lpszBuf);
		return false;
	}
	strcpy(szAnsi,lpszBuf);
	return true;
};

bool AnsiToUnicode(char* lpString,wchar_t* szUnicode)//(in,out) 
{
	size_t nLen=strlen(lpString);
	wchar_t* lpszBuf=(wchar_t*)malloc(nLen);//malloc <stdlib.h> and <malloc.h>
	setlocale(LC_ALL,"");
	size_t nRet = mbstowcs(lpszBuf, lpString, nLen);
	if(nRet<0)
	{
		free(lpszBuf);
		return false;
	}
	wcscpy(szUnicode,lpszBuf);
	return true;
};

//UTF-8到GB2312的转换
char* U2G(const char* utf8){
    static char szRet[1024];
    memset( szRet, 0x00, 1024);
    int len = MultiByteToWideChar(CP_UTF8, 0, utf8, -1, NULL, 0);
    wchar_t* wstr = new wchar_t[len+1];
    memset(wstr, 0, len+1);
    MultiByteToWideChar(CP_UTF8, 0, utf8, -1, wstr, len);
    len = WideCharToMultiByte(CP_ACP, 0, wstr, -1, NULL, 0, NULL, NULL);
    WideCharToMultiByte(CP_ACP, 0, wstr, -1, szRet, len, NULL, NULL);
    if(wstr) delete[] wstr;
    return szRet;
};

//GB2312到UTF-8的转换
char* G2U(const char* gb2312){
    static char szRet[1024];
    memset( szRet,0x00,1024 );
    int len = MultiByteToWideChar(CP_ACP, 0, gb2312, -1, NULL, 0);
    wchar_t* wstr = new wchar_t[len+1];
    memset(wstr, 0, len+1);
    MultiByteToWideChar(CP_ACP, 0, gb2312, -1, wstr, len);
    len = WideCharToMultiByte(CP_UTF8, 0, wstr, -1, NULL, 0, NULL, NULL);
    WideCharToMultiByte(CP_UTF8, 0, wstr, -1, szRet, len, NULL, NULL);
    if(wstr) delete[] wstr;
    return szRet;
};

std::string UTF_82ASCII(std::string &strUtf8Code)
{
	#ifdef WIN32
	std::string strRet("");
	//?¨¨¡ã? utf8 ¡Áa?a unicode 
	std::wstring wstr = Utf82Unicode(strUtf8Code);

	//¡Á?o¨®¡ã? unicode ¡Áa?a ascii
	strRet = WideByte2Acsi(wstr);
	return strRet;
	#endif
	#ifdef linux
    char lpszBuf[256]={0};
    u2a(const_cast<char*>(strUtf8Code.c_str()),strUtf8Code.size(),lpszBuf,256);
	return std::string(lpszBuf);
	#endif
};

//ascii ¡Áa Utf8
std::string ASCII2UTF_8(std::string& strAsciiCode)
{
	#ifdef WIN32
	std::string strRet("");
	//?¨¨¡ã? ascii ¡Áa?a unicode 
	std::wstring wstr = Acsi2WideByte(strAsciiCode);
	//¡Á?o¨®¡ã? unicode ¡Áa?a utf8
	strRet = Unicode2Utf8(wstr);
	return strRet;
	#endif
	#ifdef linux
    char lpszBuf[256]={0};
    a2u(const_cast<char*>(strAsciiCode.c_str()),strAsciiCode.size(),lpszBuf,256);
	return std::string(lpszBuf);
	#endif
};

/
bool containStr(std::string _str, std::string _strsub)
{
	std::string::size_type pos = _str.find(_strsub);//²éÕÒ_strsub±êʶ
	if(pos!=std::string::npos){
		return true;
	}
	return false;
};

/
/***************************************************************************** 
 * 将一个字符的Unicode(UCS-2和UCS-4)编码转换成UTF-8编码. 
 * 
 * 参数: 
 *    unic     字符的Unicode编码值 
 *    pOutput  指向输出的用于存储UTF8编码值的缓冲区的指针 
 *    outsize  pOutput缓冲的大小 
 * 
 * 返回值: 
 *    返回转换后的字符的UTF8编码所占的字节数, 如果出错则返回 0 . 
 * 
 * 注意: 
 *     1. UTF8没有字节序问题, 但是Unicode有字节序要求; 
 *        字节序分为大端(Big Endian)和小端(Little Endian)两种; 
 *        在Intel处理器中采用小端法表示, 在此采用小端法表示. (低地址存低位) 
 *     2. 请保证 pOutput 缓冲区有最少有 6 字节的空间大小! 
 ****************************************************************************/  
int enc_unicode_to_utf8_one(unsigned long unic, unsigned char *pOutput, int outSize)  
{  
    assert(pOutput != NULL);  
    assert(outSize >= 6);  
  
    if ( unic <= 0x0000007F )  
    {  
        // * U-00000000 - U-0000007F:  0xxxxxxx  
        *pOutput     = (unic & 0x7F);  
        return 1;  
    }  
    else if ( unic >= 0x00000080 && unic <= 0x000007FF )  
    {  
        // * U-00000080 - U-000007FF:  110xxxxx 10xxxxxx  
        *(pOutput+1) = (unic & 0x3F) | 0x80;  
        *pOutput     = ((unic >> 6) & 0x1F) | 0xC0;  
        return 2;  
    }  
    else if ( unic >= 0x00000800 && unic <= 0x0000FFFF )  
    {  
        // * U-00000800 - U-0000FFFF:  1110xxxx 10xxxxxx 10xxxxxx  
        *(pOutput+2) = (unic & 0x3F) | 0x80;  
        *(pOutput+1) = ((unic >>  6) & 0x3F) | 0x80;  
        *pOutput     = ((unic >> 12) & 0x0F) | 0xE0;  
        return 3;  
    }  
    else if ( unic >= 0x00010000 && unic <= 0x001FFFFF )  
    {  
        // * U-00010000 - U-001FFFFF:  11110xxx 10xxxxxx 10xxxxxx 10xxxxxx  
        *(pOutput+3) = (unic & 0x3F) | 0x80;  
        *(pOutput+2) = ((unic >>  6) & 0x3F) | 0x80;  
        *(pOutput+1) = ((unic >> 12) & 0x3F) | 0x80;  
        *pOutput     = ((unic >> 18) & 0x07) | 0xF0;  
        return 4;  
    }  
    else if ( unic >= 0x00200000 && unic <= 0x03FFFFFF )  
    {  
        // * U-00200000 - U-03FFFFFF:  111110xx 10xxxxxx 10xxxxxx 10xxxxxx 10xxxxxx  
        *(pOutput+4) = (unic & 0x3F) | 0x80;  
        *(pOutput+3) = ((unic >>  6) & 0x3F) | 0x80;  
        *(pOutput+2) = ((unic >> 12) & 0x3F) | 0x80;  
        *(pOutput+1) = ((unic >> 18) & 0x3F) | 0x80;  
        *pOutput     = ((unic >> 24) & 0x03) | 0xF8;  
        return 5;  
    }  
    else if ( unic >= 0x04000000 && unic <= 0x7FFFFFFF )  
    {  
        // * U-04000000 - U-7FFFFFFF:  1111110x 10xxxxxx 10xxxxxx 10xxxxxx 10xxxxxx 10xxxxxx  
        *(pOutput+5) = (unic & 0x3F) | 0x80;  
        *(pOutput+4) = ((unic >>  6) & 0x3F) | 0x80;  
        *(pOutput+3) = ((unic >> 12) & 0x3F) | 0x80;  
        *(pOutput+2) = ((unic >> 18) & 0x3F) | 0x80;  
        *(pOutput+1) = ((unic >> 24) & 0x3F) | 0x80;  
        *pOutput     = ((unic >> 30) & 0x01) | 0xFC;  
        return 6;  
    }  
  
    return 0;  
}  

/***************************************************************************** 
 * 将一个字符的UTF8编码转换成Unicode(UCS-2和UCS-4)编码. 
 * 
 * 参数: 
 *    pInput      指向输入缓冲区, 以UTF-8编码 
 *    Unic        指向输出缓冲区, 其保存的数据即是Unicode编码值, 
 *                类型为unsigned long . 
 * 
 * 返回值: 
 *    成功则返回该字符的UTF8编码所占用的字节数; 失败则返回0. 
 * 
 * 注意: 
 *     1. UTF8没有字节序问题, 但是Unicode有字节序要求; 
 *        字节序分为大端(Big Endian)和小端(Little Endian)两种; 
 *        在Intel处理器中采用小端法表示, 在此采用小端法表示. (低地址存低位) 
 ****************************************************************************/  
 /*
int enc_utf8_to_unicode_one(const unsigned char* pInput, unsigned long *Unic)  
{  
    assert(pInput != NULL && Unic != NULL);  
  
    // b1 表示UTF-8编码的pInput中的高字节, b2 表示次高字节, ...  
    char b1, b2, b3, b4, b5, b6;  
  
    *Unic = 0x0; // 把 *Unic 初始化为全零  
    int utfbytes = enc_get_utf8_size(*pInput);  
    unsigned char *pOutput = (unsigned char *) Unic;  
  
    switch ( utfbytes )  
    {  
        case 0:  
            *pOutput     = *pInput;  
            utfbytes    += 1;  
            break;  
        case 2:  
            b1 = *pInput;  
            b2 = *(pInput + 1);  
            if ( (b2 & 0xE0) != 0x80 )  
                return 0;  
            *pOutput     = (b1 << 6) + (b2 & 0x3F);  
            *(pOutput+1) = (b1 >> 2) & 0x07;  
            break;  
        case 3:  
            b1 = *pInput;  
            b2 = *(pInput + 1);  
            b3 = *(pInput + 2);  
            if ( ((b2 & 0xC0) != 0x80) || ((b3 & 0xC0) != 0x80) )  
                return 0;  
            *pOutput     = (b2 << 6) + (b3 & 0x3F);  
            *(pOutput+1) = (b1 << 4) + ((b2 >> 2) & 0x0F);  
            break;  
        case 4:  
            b1 = *pInput;  
            b2 = *(pInput + 1);  
            b3 = *(pInput + 2);  
            b4 = *(pInput + 3);  
            if ( ((b2 & 0xC0) != 0x80) || ((b3 & 0xC0) != 0x80)  
                    || ((b4 & 0xC0) != 0x80) )  
                return 0;  
            *pOutput     = (b3 << 6) + (b4 & 0x3F);  
            *(pOutput+1) = (b2 << 4) + ((b3 >> 2) & 0x0F);  
            *(pOutput+2) = ((b1 << 2) & 0x1C)  + ((b2 >> 4) & 0x03);  
            break;  
        case 5:  
            b1 = *pInput;  
            b2 = *(pInput + 1);  
            b3 = *(pInput + 2);  
            b4 = *(pInput + 3);  
            b5 = *(pInput + 4);  
            if ( ((b2 & 0xC0) != 0x80) || ((b3 & 0xC0) != 0x80)  
                    || ((b4 & 0xC0) != 0x80) || ((b5 & 0xC0) != 0x80) )  
                return 0;  
            *pOutput     = (b4 << 6) + (b5 & 0x3F);  
            *(pOutput+1) = (b3 << 4) + ((b4 >> 2) & 0x0F);  
            *(pOutput+2) = (b2 << 2) + ((b3 >> 4) & 0x03);  
            *(pOutput+3) = (b1 << 6);  
            break;  
        case 6:  
            b1 = *pInput;  
            b2 = *(pInput + 1);  
            b3 = *(pInput + 2);  
            b4 = *(pInput + 3);  
            b5 = *(pInput + 4);  
            b6 = *(pInput + 5);  
            if ( ((b2 & 0xC0) != 0x80) || ((b3 & 0xC0) != 0x80)  
                    || ((b4 & 0xC0) != 0x80) || ((b5 & 0xC0) != 0x80)  
                    || ((b6 & 0xC0) != 0x80) )  
                return 0;  
            *pOutput     = (b5 << 6) + (b6 & 0x3F);  
            *(pOutput+1) = (b5 << 4) + ((b6 >> 2) & 0x0F);  
            *(pOutput+2) = (b3 << 2) + ((b4 >> 4) & 0x03);  
            *(pOutput+3) = ((b1 << 6) & 0x40) + (b2 & 0x3F);  
            break;  
        default:  
            return 0;  
            break;  
    }  
  
    return utfbytes;  
}  
*/
///
/*
std::string ws2s(const std::wstring& ws)
{
    std::string curLocale = setlocale(LC_ALL, NULL); // curLocale = "C";
    setlocale(LC_ALL, "chs"); 
    const wchar_t* _Source = ws.c_str();
    size_t _Dsize = 2 * ws.size() + 1;
    char *_Dest = new char[_Dsize];
    memset(_Dest,0,_Dsize);
    wcstombs(_Dest,_Source,_Dsize);
    std::string result = _Dest;
    delete []_Dest;
    setlocale(LC_ALL, curLocale.c_str());
    return result;
}
*/ 
/*
std::wstring s2ws(const std::string& s)
{
    setlocale(LC_ALL, "chs"); 
    const char* _Source = s.c_str();
    size_t _Dsize = s.size() + 1;
    wchar_t *_Dest = new wchar_t[_Dsize];
    wmemset(_Dest, 0, _Dsize);
    int nret = mbstowcs(_Dest,_Source,_Dsize);
    std::wstring result = _Dest;
    delete []_Dest;
    setlocale(LC_ALL, "C");
 
    return result;

}
*/

/* 
std::wstring UTF2Uni(const char* src, std::wstring &t)
{
    if (src == NULL) 
    {
        return L"";
    }
    
    int size_s = strlen(src);
    int size_d = size_s + 10;          //?
    
    wchar_t *des = new wchar_t[size_d];
    memset(des, 0, size_d * sizeof(wchar_t));
    
    int s = 0, d = 0;
    bool toomuchbyte = true; //set true to skip error prefix.
    
    while (s < size_s && d < size_d)
    {
        unsigned char c = src[s];
        if ((c & 0x80) == 0) 
        {
            des[d++] += src[s++];
        } 
        else if((c & 0xE0) == 0xC0)  ///< 110x-xxxx 10xx-xxxx
        {
            WCHAR &wideChar = des[d++];
            wideChar  = (src[s + 0] & 0x3F) << 6;
            wideChar |= (src[s + 1] & 0x3F);
            
            s += 2;
        }
        else if((c & 0xF0) == 0xE0)  ///< 1110-xxxx 10xx-xxxx 10xx-xxxx
        {
            WCHAR &wideChar = des[d++];
            
            wideChar  = (src[s + 0] & 0x1F) << 12;
            wideChar |= (src[s + 1] & 0x3F) << 6;
            wideChar |= (src[s + 2] & 0x3F);
            
            s += 3;
        } 
        else if((c & 0xF8) == 0xF0)  ///< 1111-0xxx 10xx-xxxx 10xx-xxxx 10xx-xxxx 
        {
            WCHAR &wideChar = des[d++];
            
            wideChar  = (src[s + 0] & 0x0F) << 18;
            wideChar  = (src[s + 1] & 0x3F) << 12;
            wideChar |= (src[s + 2] & 0x3F) << 6;
            wideChar |= (src[s + 3] & 0x3F);
            
            s += 4;
        } 
        else 
        {
            WCHAR &wideChar = des[d++]; ///< 1111-10xx 10xx-xxxx 10xx-xxxx 10xx-xxxx 10xx-xxxx 
            
            wideChar  = (src[s + 0] & 0x07) << 24;
            wideChar  = (src[s + 1] & 0x3F) << 18;
            wideChar  = (src[s + 2] & 0x3F) << 12;
            wideChar |= (src[s + 3] & 0x3F) << 6;
            wideChar |= (src[s + 4] & 0x3F);
            
            s += 5;
        }
    }
    
    t = des;
    delete[] des;
    des = NULL;
    
    return t;
}
*/

/*
int Uni2UTF( const std::wstring& strRes, char *utf8, int nMaxSize )
{
    if (utf8 == NULL) {
        return -1;
    }
    int len = 0;
    int size_d = nMaxSize;


    for (std::wstring::const_iterator it = strRes.begin(); it != strRes.end(); ++it)
    {
        wchar_t wchar = *it;
        if (wchar < 0x80)
        {  //
            //length = 1;
            utf8[len++] = (char)wchar;
        }
        else if(wchar < 0x800)
        {
            //length = 2;
            
            if (len + 1 >= size_d)
                return -1;
            
            utf8[len++] = 0xc0 | ( wchar >> 6 );
            utf8[len++] = 0x80 | ( wchar & 0x3f );
        }
        else if(wchar < 0x10000 )
        {
            //length = 3;
            if (len + 2 >= size_d)
                return -1;
            
            utf8[len++] = 0xe0 | ( wchar >> 12 );
            utf8[len++] = 0x80 | ( (wchar >> 6) & 0x3f );
            utf8[len++] = 0x80 | ( wchar & 0x3f );
        }
        else if( wchar < 0x200000 ) 
        {
            //length = 4;
            if (len + 3 >= size_d)
                return -1;
            
            utf8[len++] = 0xf0 | ( (int)wchar >> 18 );
            utf8[len++] = 0x80 | ( (wchar >> 12) & 0x3f );
            utf8[len++] = 0x80 | ( (wchar >> 6) & 0x3f );
            utf8[len++] = 0x80 | ( wchar & 0x3f );
        }
    
    }
    

    return len;
}
*/
/*
std::string s2utfs(const  std::string&  strSrc)
{
    std::string  strRes;
    std::wstring  wstrUni = s2ws(strSrc);
    
    char*  chUTF8 = new char[wstrUni.length() * 3];
    memset(chUTF8,0x00,wstrUni.length() * 3);
    Uni2UTF(wstrUni,chUTF8, wstrUni.length() * 3);
    strRes = chUTF8;    
    delete  []chUTF8;
    return strRes;
}
*/
/*
std::string  utfs2s(const std::string& strutf)
{
    std::wstring  wStrTmp;
    UTF2Uni( strutf.c_str(),wStrTmp);
    return ws2s(wStrTmp);
}
*/

myfiledialog.h基于QFileDialog实现自定义对话框

#ifndef MYFILEDIALOG_H
#define MYFILEDIALOG_H

#include <QFileDialog>

class MyFileDialog : public QFileDialog
{
	Q_OBJECT
public:
	MyFileDialog( QWidget * parent = 0
		, int _model = 0
		, const QString & caption = QString()
		, const QString & directory = QString()
		, const QString & filter = QString());
	~MyFileDialog();
private:
	void init(int _model);
private:
	QString initDir;
	/* data */
};

#endif //MYFILEDIALOG_H

myfiledialog.cpp

#include "myfiledialog.h"

#include <QCoreApplication>

MyFileDialog::MyFileDialog(QWidget * parent
		, int _model
		, const QString & caption
		, const QString & directory
		, const QString & filter )
	: QFileDialog(parent,caption,directory,filter)
	, initDir(directory)
{
	init(_model);
}

MyFileDialog::~MyFileDialog()
{

}

void MyFileDialog::init(int _model)
{
    this->setWindowTitle(tr("File Path Set Dialog"));
    this->setLabelText(QFileDialog::LookIn,tr("MyLookIn"));
    this->setLabelText(QFileDialog::FileName,tr("MyfileName"));
    this->setLabelText(QFileDialog::FileType,tr("MyFileType"));
    QString _appDir = QCoreApplication::applicationDirPath();
    switch(_model)
    {
    	case 0:
    	    this->setAcceptMode(QFileDialog::AcceptSave);
		    this->setLabelText(QFileDialog::Accept,tr("mySave"));
	        this->setDirectory(_appDir);
            this->setNameFilter(tr("csv Files (*.csv)"));
    		break;
    	case 1:
    	    this->setAcceptMode(QFileDialog::AcceptSave);
		    this->setLabelText(QFileDialog::Accept,tr("mySave"));
		    this->setDirectory(_appDir);
            this->setNameFilter(tr("xml Files (*.xml)"));
    		break;
    	case 2:
    	    this->setAcceptMode(QFileDialog::AcceptOpen);
		    this->setLabelText(QFileDialog::Accept,tr("myOpen"));
		    this->setDirectory(_appDir);
            this->setNameFilter(tr("xml Files (*.xml)"));
    		break;
    	case 3:
    	{

    	    // this->setAcceptMode(QFileDialog::AcceptOpen);
		    this->setFilter(QDir::NoDotAndDotDot);
		    this->setFileMode(QFileDialog::Directory);
		    this->setOptions(QFileDialog::ReadOnly);
		    this->setLabelText(QFileDialog::Accept,tr("myChoose"));
    	}
    		break;
    	case 4:
    	{
    	    this->setAcceptMode(QFileDialog::AcceptOpen);
		    this->setLabelText(QFileDialog::Accept,tr("myOpen"));
            this->setNameFilter(tr("sqlite Files (*.db)"));
    	}
    		break;
    	case 5:
    	{
		    this->setAcceptMode(QFileDialog::AcceptOpen);
		    this->setLabelText(QFileDialog::Accept,tr("myOpen"));
            this->setFilter(QDir::Files);
		}
    		break;
    	case 6:
    	{
		    this->setAcceptMode(QFileDialog::AcceptSave);
		    this->setLabelText(QFileDialog::Accept,tr("mySave"));
            this->setNameFilter(tr("csv Files (*.csv)"));
    	}
    	case 7:
    	{
    		this->setAcceptMode(QFileDialog::AcceptOpen);
		    this->setLabelText(QFileDialog::Accept,tr("myOpen"));
	        this->setDirectory(_appDir);
            this->setNameFilter(tr("csv Files (*.csv);;"
		    	"ini files (*.ini);;"
		    	"Text files (*.txt);;"
		    	"xml files (*.xml);;"
		    	"Any files (*)"));
    	}
    		break;
    	case 8:
    	{
		    this->setAcceptMode(QFileDialog::AcceptOpen);
		    this->setLabelText(QFileDialog::Accept,tr("myOpen"));
            this->setNameFilter(tr("Any files (*)"));
		}
    		break;
    	default:
    		// this->setDirectory(_appDir);
    		break;
    }
    this->setLabelText(QFileDialog::Reject,tr("myCancel"));
}

FileQt.h的FileQt类是一个单体类,可以全局调用,实现txt、csv、ini、xls等文件读取、写入操作,支持文件目录、文件名等查询、读取、删除等操作,可以依据读写文件信息的API扩展新的功能或调整实现新文件类型的支持。

#ifndef FILEQT_H
#define FILEQT_H

#include <QVector>
#include <QString>
#include <QStringList>

class FileQt
{
public:
	static FileQt* getInstance();
	static void Destroy();
	~FileQt();

	bool writeListInfo(QVector<QString> list,const QString path,bool appendf=true);
	bool readListInfo(QVector<QVector<QString> > &list,const QString path,QString _div);
	bool readListInfo(QVector<QVector<QString> > &list,const QString path);
	bool readListInfo_dot(QVector<QVector<QString> > &list,const QString path);
	bool readListInfo(QVector<QString> &list,const QString path);
	void getAllFileName_dot(const QString directory, const QString extName, QStringList& fileNames);
	void getAllFileName(const QString& directory, const QString& extName, QStringList& fileNames);
	void getSubDir(const QString& directory, QStringList& subdirs);

	bool readToVectorXML(QString _file, QStringList elements, QVector<QString> &_lists);
	bool readToVectorXML(QString _file, QStringList elements, QVector<QVector<QString> > &_lists,QString _div=",");
#ifdef WIN32
	bool readToVectorXLS(QString _file, QVector<QVector<QString> > &_lists, int sheet = 1);
#endif
private:
	bool readToVector(QString _file, QVector<QVector<QString> > &_lists,QString _div="\\s+");
	bool readToVector(QString _file, QVector<QString> &_lists);
private:
	FileQt();
	FileQt(const FileQt& ) {} // copy constructor
	FileQt& operator=(const FileQt& ) { return *this; } // assignment operator
private:
	static FileQt* instance;
};

#endif //FILEQT_H

FileQt.cpp

#include "FileQt.h"

#include <QFile>
#include <QIODevice>
#include <QTextStream>
#include <QStringList>
#include <QRegExp>
#include <QObject>
#include <QDir>
#include <QByteArray>
#include <QTextCodec>
#include <QXmlStreamReader>
#include <QDebug>
#ifdef WIN32
#include <QAxObject>
#endif

FileQt* FileQt::instance = NULL;
FileQt* FileQt::getInstance()
{
    if(NULL == FileQt::instance)
    {
        FileQt::instance = new FileQt();
    }
    return FileQt::instance;
}

void FileQt::Destroy()
{
	if(NULL!=FileQt::instance){
		delete FileQt::instance;
		FileQt::instance = NULL;
	}
}

FileQt::FileQt()
{
}

FileQt::~FileQt()
{
}

bool FileQt::readListInfo(QVector<QVector<QString> > &list,const QString path,QString _div)
{
    return readToVector(path,list,_div);
}

bool FileQt::readListInfo(QVector<QVector<QString> > &list,const QString path)
{
	return readToVector(path,list,"\\W+");
}

bool FileQt::readListInfo_dot(QVector<QVector<QString> > &list,const QString path)
{
	return readToVector(path,list,",");
}

bool FileQt::readListInfo(QVector<QString> &list,const QString path)
{
	return readToVector(path,list);
}

bool FileQt::readToVector(QString _file,QVector<QVector<QString> > &_lists, QString _div)
{
    #ifdef WIN32
    if (_file.contains(".xls", Qt::CaseInsensitive))
    {
        return readToVectorXLS(_file,_lists);
    }
    #endif
	QFile file(_file);
    if (!file.open(QFile::ReadOnly)) {
    	qDebug() << "conn't open file  " << _file << "!\n";
        return false;
    }else{
        QTextStream stream( &file );
        QString line;
        while ( !stream.atEnd() ) {
            line = stream.readLine();
            QStringList _strL = line.split(QRegExp(_div));
            // QStringList _strL = line.split(QRegExp(_div),QString::SkipEmptyParts);
            QVector<QString> _onev;
            for (int i = 0; i < _strL.size(); i++)
            {
            	_onev.push_back(_strL[i]);
            }
            _lists.push_back(_onev);
        }
        file.close();

        if (_lists.empty())
    	{
    		return false;
    	}else{
    		return true;
    	}
    }
}

bool FileQt::readToVector(QString _file, QVector<QString> &_lists)
{
	QFile file(_file);
    if (!file.open(QFile::ReadOnly))
    {
    	qDebug() << "conn't open file  " << _file << "!\n";
        return false;
    }else{
        QTextStream stream( &file );
        stream.setCodec("UTF-8"); //中文编码
        QString line;
        while ( !stream.atEnd() ) {
            line = stream.readLine();
            _lists.push_back(line);
        }
        file.close();

        if (_lists.empty())
    	{
    		return false;
    	}else{
    		return true;
    	}
    }
}

void FileQt::getAllFileName_dot(const QString directory, const QString extName, QStringList& fileNames)
{
    QDir _dir(directory);
    QStringList filters;
    filters << ("*."+extName);
    _dir.setNameFilters(filters);
    _dir.setFilter(QDir::Files | QDir::NoDotAndDotDot | QDir::NoSymLinks);
    _dir.setSorting(QDir::Name);
    fileNames = _dir.entryList();
    qDebug() << fileNames << "\n";
}

void FileQt::getAllFileName(const QString& directory, const QString& extName, QStringList& fileNames)
{
    QDir _dir(directory);
    QStringList filters;
    filters << ("*."+extName);
    _dir.setNameFilters(filters);
    _dir.setFilter(QDir::Files | QDir::NoDotAndDotDot | QDir::NoSymLinks);
    _dir.setSorting(QDir::Name);
    QStringList _files = _dir.entryList();
    for (int i = 0; i < _files.size(); i++)
    {
        fileNames << _files[i].left(_files[i].lastIndexOf("."));
    }
    qDebug() << fileNames << "\n";
}

void FileQt::getSubDir(const QString& directory, QStringList& subdirs)
{
    QDir _dir(directory);
    _dir.setFilter(QDir::Dirs | QDir::NoDotAndDotDot | QDir::NoSymLinks);
    _dir.setSorting(QDir::Name);
    subdirs = _dir.entryList();
    qDebug() << subdirs << "\n";
}

bool FileQt::readToVectorXML(QString _file, QStringList elements, QVector<QString> &_lists)
{
    QFile inputFile(_file);
    if(!inputFile.open(QFile::ReadOnly))
    {
        qDebug() << "cann't create file: "<< _file <<"\n";
        return false;
    }
	 QByteArray data = inputFile.readAll();
    inputFile.close();

    QTextCodec *codec = QTextCodec::codecForHtml(data);
    QString str = codec->toUnicode(data);
    QXmlStreamReader reader(str);
    //reader.readNext();

    bool readF = false;
    while (!reader.atEnd()&&!reader.hasError())
    {
        reader.readNext();
        if (reader.error())
        {
            qDebug()<<reader.errorString()<<": "<<reader.name().toString()<<"\n";
            return false;
        } else{
            if (QXmlStreamReader::StartElement==reader.tokenType()
               && elements.contains(reader.name().toString()))
            {
                readF = true;
                continue;
            }
            if (QXmlStreamReader::EndElement==reader.tokenType()
                && elements.contains(reader.qualifiedName().toString()))
            {
                readF = false;
                continue;
            }
            if(readF){
                _lists.push_back(reader.text().toString());
            }
        }
    }
    return true;
}

bool FileQt::readToVectorXML(QString _file, QStringList elements, QVector<QVector<QString> > &_lists,QString _div)
{
    QVector<QString> _list;
    if(readToVectorXML(_file,elements,_list)){
        for (int i = 0; i < _list.size(); i++)
        {
            QStringList _linelist = _list[i].split(QRegExp(_div));
            QVector<QString> _linevect;
            for (int j = 0; j < _linelist.size(); j++)
            {
                _linevect << _linelist[j];
            }
            _lists.push_back(_linevect);
        }
        return true;
    }
    return false;
}

#ifdef WIN32
bool FileQt::readToVectorXLS(QString _file, QVector<QVector<QString> > &_lists, int sheet)
{
	if(sheet<=0)
	{
		return false;
	}
    QAxObject *excel = NULL;
    QAxObject *workbooks = NULL;
    QAxObject *workbook = NULL;

    excel = new QAxObject("Excel.Application");//连接Excel控件
    if (!excel) {
        qDebug()<< QObject::tr("error info: ") << QObject::tr("EXCEL object loss") <<"\n";
        return false;
    }
    excel->dynamicCall("SetVisible(bool)", false);//不显示窗体
    excel->setProperty("DisplayAlerts", false);//不显示任何警告信息。

    workbooks = excel->querySubObject("WorkBooks");//获取工作簿集合
    workbook = workbooks->querySubObject("Open(QString, QVariant)", _file); //打开工作簿
	qDebug() << "workbooks size = " << workbook->querySubObject("WorkSheets")->property("Count").toInt() << "\n";
	if(sheet>workbook->querySubObject("WorkSheets")->property("Count").toInt()){
		delete workbook;
		workbook = NULL;
		delete workbooks;
		workbooks = NULL;
		delete excel;
		excel = NULL;
		return false;
	}
    QAxObject * worksheet = workbook->querySubObject("WorkSheets(int)", sheet);//打开第一个sheet

    QAxObject * usedrange = worksheet->querySubObject("UsedRange");//获取该sheet的使用范围对象
    int intRowStart = usedrange->property("Row").toInt();
    int intColStart = usedrange->property("Column").toInt();

    QAxObject * rows = usedrange->querySubObject("Rows");
    int intRows = rows->property("Count").toInt();

    QAxObject * columns = usedrange->querySubObject("Columns");
    int intCols = columns->property("Count").toInt();

    for (int i = intRowStart; i < intRowStart + intRows; i++)//row
    {
        QVector<QString> _onev;
        for (int j = intColStart; j < intColStart + intCols; j++)//column
        {
            // QAxObject * range = worksheet->querySubObject("Cells(QVariant,QVariant)", i, j ); //获取单元格
            // // qDebug() << i << j << range->property("Value");
            // _onev.push_back(range->property("Value").toString());

            _onev.push_back(
                worksheet->querySubObject("Cells(QVariant,QVariant)", i, j )->property("Value").toString());
        }
        _lists.push_back(_onev);
    }
    workbook->dynamicCall("Close()");//关闭工作簿
    excel->dynamicCall("Quit()");//关闭excel

    delete columns;
    columns = NULL;
    delete rows;
    rows = NULL;
    delete usedrange;
    usedrange = NULL;
    delete worksheet;
    worksheet = NULL;
    delete workbook;
    workbook = NULL;
    delete workbooks;
    workbooks = NULL;
    delete excel;
    excel = NULL;

    return true;
}
#endif

bool FileQt::writeListInfo(QVector<QString> list,const QString path,bool appendf)
{
    QFile f(path);
    if(!f.open(QFile::WriteOnly | QFile::Text | (appendf?QFile::Append:QFile::Truncate)))
        return false;

    QTextStream out(&f);

    out.setCodec("UTF-8"); //中文编码
    for (int i = 0; i < list.size(); i++)
    {
        out << QString(list[i]);
    }
    f.close();
    return true;
}

inOrOutConf.h实现简要的界面窗口,

python将sql文件转换成csv sql文件转csv文件_QSQLitePlugin

提供sqlite数据库文件路径及csv文件目录编辑以及两个转换按钮。

#ifndef INOROUT_CONF_H
#define INOROUT_CONF_H

#include <QWidget>

class QLineEdit;
class QPushButton;
class QLabel;

class InOrOutConf : public QWidget
{
	Q_OBJECT
public:
	InOrOutConf(QWidget * parent = 0,Qt::WindowFlags f = 0);
	~InOrOutConf();

private slots:
	void setDBPath();
	void setCsvPath();
	void scvToDB();
	void DBToCsv();
private:
	QString divPath;
	QLineEdit *pathEdit;	//db路径编辑框
	QPushButton *pathset;	//db路径打开

	QLineEdit *dirEdit;	//文件目录编辑框
	QPushButton *dirset;	//文件目录打开

	QPushButton *inButton;	//csv到db
	QPushButton *outButton;	//db到csv
	QPushButton *close;	//

	QLabel *warLabel;
};

#endif //INOROUT_CONF_H

inOrOutConf.cpp,注意inYc、outYc等API主要实现关于表格名、列表名特定处理,暂没做抽象提取及可配置实现。

#include "inOrOutConf.h"

#include <QLineEdit>
#include <QPushButton>
#include <QLabel>
#include <QFormLayout>
#include <QHBoxLayout>
#include <QVBoxLayout>
#include <QGridLayout>

#include <QCoreApplication>
#include <QFile>
#include <QSqlDatabase>
#include <QSqlQuery>
#include <QSqlError>

#ifdef WIN32
#include <QtPlugin>
Q_IMPORT_PLUGIN(QSQLiteDriverPlugin)
#endif

#include <QVector>
#include <QTextCodec>
#include <QDebug>

// #include "sqlite/sqlite3.h"
// #include "sqlite/CSQLite.h"

#include "file/myfiledialog.h"
#include "file/strcode.hpp"

// //101YC配置表
// typedef struct _s101yc{
// 	int INDEXID;
// 	int DEVID;
// 	char NAME[256];
// 	unsigned int LOCALADDR;
// 	double COEF;
// 	double THV;
// 	char NAMETOMST[256];
// 	unsigned int ZEROVAL;
// 	unsigned int SAMPADDR;
// 	unsigned int SAMPDEVID;
// 	char EXPLAIN[256];
// }s101yc;


// //101YX配置表
// typedef struct _s101yx{
// 	int INDEXID;
// 	int DEVID;
// 	char NAME[256];
// 	unsigned int LOCALADDR;
// 	unsigned int NOT;
//  	unsigned int SAMPDEVID;
// 	unsigned int SAMPADDR;
// 	char NAMETOMST[256];
// }s101yx;


// //101YK配置表
// typedef struct _s101yk{
// 	int INDEXID;
// 	unsigned int LOCALADDR;
// 	int DEVID;
// 	char NAME[256];
// 	unsigned int SAMPDEVID;
// 	unsigned int SAMPADDR;
// 	char NAMETOMST[256];
// }s101yk;

// //YC
// int GetS101yc(const char * dbfile, const char* condition, s101yc * ycs, int size)
// {
// 	CSQLiteDB db;
// 	if( !db.open(dbfile) ){
// 		printf("open db: error!", dbfile);
// 		return -1;
// 	}
// 	char sql[1024] ={0};
// 	if( strlen(condition) > 0 )
// 		sprintf(sql,"select * from s101yc where %s", condition);
// 	else
// 		sprintf(sql,"select * from s101yc");
// 	int icount = 0;
// 	CSQLiteQuery query;
// 	try{
// 		query = db.execQuery(sql);
// 		while( !query.eof() && icount<size ){
// 			ycs[icount].INDEXID = query.getIntField("INDEXID");
// 			ycs[icount].DEVID = query.getIntField("DEVID");
// 			strcpy( ycs[icount].NAME,query.getStringField("NAME"));
// 			ycs[icount].LOCALADDR = query.getIntField("LOCALADDR");
// 			ycs[icount].COEF = query.getFloatField("COEF");
// 			ycs[icount].THV = query.getFloatField("THV");
// 			strcpy( ycs[icount].NAMETOMST,query.getStringField("NAMETOMST"));
// 			ycs[icount].ZEROVAL = query.getIntField("ZEROVAL");
// 			ycs[icount].SAMPADDR = query.getIntField("SAMPADDR");
// 			ycs[icount].SAMPDEVID = query.getIntField("SAMPDEVID");
// 			strcpy( ycs[icount].EXPLAIN,query.getStringField("EXPLAIN"));
// 			icount++;
// 			query.nextRow();
// 		}
// 	}catch (CSQLiteException& e) {
// 		printf("db query error %d\n",e.errorCode());
// 		return -1;
// 	}
// 	return icount;
// };

InOrOutConf::InOrOutConf(QWidget * parent,Qt::WindowFlags f)
	: QWidget(parent,f)
{
	pathEdit = new QLineEdit(this);
    pathEdit->setMinimumWidth(200);
    pathset = new QPushButton(tr("dbOpen"),this);
    pathset->setMaximumWidth(72);
    connect(pathset,SIGNAL(clicked()),this,SLOT(setDBPath()));

	//layout
    QFormLayout *formLayout_00 = new QFormLayout;
    formLayout_00->setContentsMargins(0,0,0,0);
    formLayout_00->addRow(tr("dbPath:"), pathEdit);

    QHBoxLayout *m_QHBoxLayout_00 = new QHBoxLayout;
    m_QHBoxLayout_00->setContentsMargins(0,0,0,0);
    m_QHBoxLayout_00->addLayout(formLayout_00);
    m_QHBoxLayout_00->addWidget(pathset);

    dirEdit = new QLineEdit(this);
    dirEdit->setMinimumWidth(200);
    dirset = new QPushButton(tr("scvDirCheck"),this);
    dirset->setMaximumWidth(72);
    connect(dirset,SIGNAL(clicked()),this,SLOT(setCsvPath()));

	//layout
    QFormLayout *formLayout_01 = new QFormLayout;
    formLayout_01->setContentsMargins(0,0,0,0);
    formLayout_01->addRow(tr("scvDir:"), dirEdit);

    QHBoxLayout *m_QHBoxLayout_01 = new QHBoxLayout;
    m_QHBoxLayout_01->setContentsMargins(0,0,0,0);
    m_QHBoxLayout_01->addLayout(formLayout_01);
    m_QHBoxLayout_01->addWidget(dirset);

    QVBoxLayout *m_QVBoxLayout = new QVBoxLayout;
    m_QVBoxLayout->addLayout(m_QHBoxLayout_00);
    m_QVBoxLayout->addLayout(m_QHBoxLayout_01);

    warLabel = new QLabel(this);

    inButton = new QPushButton(tr("scvToDB"),this);
    inButton->setMaximumWidth(72);
    connect(inButton,SIGNAL(clicked()),this,SLOT(scvToDB()));
    outButton = new QPushButton(tr("DBToCsv"),this);
    outButton->setMaximumWidth(72);
    connect(outButton,SIGNAL(clicked()),this,SLOT(DBToCsv()));
    close = new QPushButton(tr("Close"),this);
    close->setMaximumWidth(72);
    connect(close,SIGNAL(clicked()),this,SLOT(close()));

    QGridLayout *_QGridLayout = new QGridLayout(this);
    _QGridLayout->addLayout(m_QVBoxLayout,0,0,2,10);
    _QGridLayout->addWidget(warLabel,2,0,1,10);
    _QGridLayout->addWidget(inButton,3,7,1,1);
    _QGridLayout->addWidget(outButton,3,8,1,1);
    _QGridLayout->addWidget(close,3,9,1,1);
	#ifdef WIN32
    divPath = "\\";
    #else
    divPath = "/";
    #endif
};

InOrOutConf::~InOrOutConf()
{

};

void InOrOutConf::setDBPath()
{
	QString dbPath = QCoreApplication::applicationDirPath()+divPath+"exxconf.db";
    MyFileDialog *fileDialog = new MyFileDialog(this,4,tr("open DB file"),dbPath);

    if(fileDialog->exec() == QDialog::Accepted) {
        dbPath = fileDialog->selectedFiles()[0];
    }
    qDebug() << "dbPath = "<<dbPath<<"\n";
    this->pathEdit->setText(dbPath);
};

void InOrOutConf::setCsvPath()
{
	QString csvDir = QCoreApplication::applicationDirPath();
    MyFileDialog *fileDialog = new MyFileDialog(this,3,tr("open CSV dir"),csvDir);

    if(fileDialog->exec() == QDialog::Accepted) {
        csvDir = fileDialog->selectedFiles()[0];
    }
    qDebug() << "csvDir = "<<csvDir<<"\n";
    this->dirEdit->setText(csvDir);
};

bool executeSQL(QSqlDatabase db,QString _sql)
{
	QSqlQuery query(db);
    return query.exec(_sql);
};

bool checkTable(QSqlDatabase db, QString _table)
{
    QString _sql = QString("select count(*) from sqlite_master where type='table' and name='%1'").arg(_table);
    QSqlQuery query(db);
    query.exec(_sql);
    bool _existTable = true;
    if (query.next())
    {
        int _countTable = query.value(0).toInt();
        if (1!=_countTable)
        {
            _existTable = false;
        }
    }else{
        _existTable = false;
    }
    return _existTable;
};

bool opendb(QSqlDatabase &db, QString _dbn,QString _dbLink)
{
    QString dbv = "QSQLITE";
    // QString _dbLink = "db_sqlite_record";
    if (QSqlDatabase::contains(_dbLink))
    {
		db = QSqlDatabase::database(_dbLink);
    }else{
    	db = QSqlDatabase::addDatabase(dbv,_dbLink);
    }
	// checkDBLink(_dbLink);
	// db = QSqlDatabase::addDatabase(dbv,_dbLink);
    db.setDatabaseName(_dbn);

    if (db.open())
    {
        return true;
    }else{
        qDebug() << "open db failed!"<< "---"<< db.lastError().text()<<" \n";
        return false;
    }
};

bool checkdb_etconf(QSqlDatabase &db, QString _dbn)
{
	if (!opendb(db,_dbn,"db_sqlite_etconf"))
	{
		return false;
	}else{
		if(!executeSQL(db,"PRAGMA synchronous = OFF"))
		{
			qDebug() << db.lastError() << "\n";
		}
	}

	if(!checkTable(db,"s101yc"))
	{
		return false;
	}
	if(!checkTable(db,"s101yx"))
	{
		return false;
	}
	if(!checkTable(db,"s101yk"))
	{
		return false;
	}
	if(!checkTable(db,"s101yt"))
	{
		return false;
	}
	return true;
};

bool readToVector(QString _file,QVector<QVector<QString> > &_lists, QString _div)
{
	QFile file(_file);
    if (!file.open(QFile::ReadOnly)) {
    	qDebug() << "conn't open file  " << _file << "!\n";
        return false;
    }else{
        QTextStream stream( &file );
        QString line;
        while ( !stream.atEnd() ) {
            line = stream.readLine();
            QStringList _strL = line.split(QRegExp(_div));
            // QStringList _strL = line.split(QRegExp(_div),QString::SkipEmptyParts);
            QVector<QString> _onev;
            for (int i = 0; i < _strL.size(); i++)
            {
            	_onev.push_back(_strL[i]);
            }
            _lists.push_back(_onev);
        }
        file.close();

        if (_lists.empty())
    	{
    		return false;
    	}else{
    		return true;
    	}
    }
}

void inYc(QSqlDatabase &db,QString _path)
{
	QVector<QVector<QString> > _lists;
	readToVector(_path,_lists,",");

	QSqlQuery query(db);
	query.exec("DELETE FROM s101yc");

	QVariantList indexids;
	QVariantList devids;
	QVariantList names;
	QVariantList localaddrs;
	QVariantList coefs;
	QVariantList thvs;
	QVariantList nametomsts;
	QVariantList zerovals;
	QVariantList sampaddrs;
	QVariantList sampdevids;
	QVariantList explains;

	int _count = 0;
	QString _sql = "INSERT INTO s101yc (INDEXID,DEVID,NAME,LOCALADDR,COEF,THV,NAMETOMST,ZEROVAL,SAMPADDR,SAMPDEVID,EXPLAIN) "
			       "VALUES (?,?,?,?,?,?,?,?,?,?,?)";

	for (int i = 0; i < _lists.size(); i++)
	{
		if (11!=_lists[i].size())
		{
			continue;
		}
		indexids << _lists[i][0].toInt();
		devids << _lists[i][1].toInt();
		names << _lists[i][2];
		// names << QString("%1").arg(_lists[i][2].toAscii().data());
		localaddrs << _lists[i][3].toInt();
		coefs << _lists[i][4].toDouble();
		thvs << _lists[i][5].toDouble();
		nametomsts << _lists[i][6];
		// nametomsts << QString("%1").arg(_lists[i][6].toAscii().data());
		zerovals << _lists[i][7].toInt();
		sampaddrs << _lists[i][8].toInt();
		sampdevids << _lists[i][9].toInt();
		explains << _lists[i][10];
		// explains << QString("%1").arg(_lists[i][10].toAscii().data());
		_count+=1;
		if (_count>=200||(i==(_lists.size()-1)))
		{
			try{
				query.prepare(_sql);
				query.addBindValue(indexids);
				query.addBindValue(devids);
				query.addBindValue(names);
				query.addBindValue(localaddrs);
				query.addBindValue(coefs);
				query.addBindValue(thvs);
				query.addBindValue(nametomsts);
				query.addBindValue(zerovals);
				query.addBindValue(sampaddrs);
				query.addBindValue(sampdevids);
				query.addBindValue(explains);

				if (!query.execBatch())
				{
					qDebug() << query.lastError();
				}
			}catch(...){
				qDebug() << query.lastError();
			}
			indexids.clear();
		    devids.clear();
		    names.clear();
		    localaddrs.clear();
		    coefs.clear();
		    thvs.clear();
		    nametomsts.clear();
		    zerovals.clear();
		    sampaddrs.clear();
		    sampdevids.clear();
		    explains.clear();
		    _count = 0;
		}

	}
};

void inYx(QSqlDatabase &db,QString _path)
{
	QVector<QVector<QString> > _lists;
	readToVector(_path,_lists,",");

	QSqlQuery query(db);
	query.exec("DELETE FROM s101yx");

	QVariantList indexids;
	QVariantList devids;
	QVariantList names;
	QVariantList localaddrs;
	QVariantList nots;
	QVariantList sampdevids;
	QVariantList sampaddrs;
	QVariantList nametomsts;

	int _count = 0;
	QString _sql = "INSERT INTO s101yx (INDEXID,DEVID,NAME,LOCALADDR,\"NOT\",SAMPDEVID,SAMPADDR,NAMETOMST) "
			       "VALUES (?,?,?,?,?,?,?,?)";

	for (int i = 0; i < _lists.size(); i++)
	{
		if (8!=_lists[i].size())
		{
			continue;
		}
		indexids << _lists[i][0].toInt();
		devids << _lists[i][1].toInt();
		names << _lists[i][2];
		// names << QString("%1").arg(_lists[i][2].toAscii().data());
		localaddrs << _lists[i][3].toInt();
		nots << _lists[i][4].toInt();
		sampdevids << _lists[i][5].toInt();
		sampaddrs << _lists[i][6].toInt();
		nametomsts << _lists[i][7];
		// nametomsts << QString("%1").arg(_lists[i][7].toAscii().data());

		_count+=1;
		if (_count>=200||(i==(_lists.size()-1)))
		{
			try{
				query.prepare(_sql);
				query.addBindValue(indexids);
				query.addBindValue(devids);
				query.addBindValue(names);
				query.addBindValue(localaddrs);
				query.addBindValue(nots);
				query.addBindValue(sampdevids);
				query.addBindValue(sampaddrs);
				query.addBindValue(nametomsts);

				if (!query.execBatch())
				{
					qDebug() << query.lastError();
				}
			}catch(...){
				qDebug() << query.lastError();
			}
			indexids.clear();
		    devids.clear();
		    names.clear();
		    localaddrs.clear();
		    nots.clear();
		    sampdevids.clear();
		    sampaddrs.clear();
		    nametomsts.clear();

		    _count = 0;
		}
	}
};

void inYk(QSqlDatabase &db,QString _path)
{
	QVector<QVector<QString> > _lists;
	readToVector(_path,_lists,",");

	QSqlQuery query(db);
	query.exec("DELETE FROM s101yk");

	QVariantList indexids;
	QVariantList localaddrs;
	QVariantList devids;
	QVariantList names;
	QVariantList sampaddrs;
	QVariantList sampdevids;
	QVariantList nametomsts;

	int _count = 0;
	QString _sql = "INSERT INTO s101yk (INDEXID,LOCALADDR,DEVID,NAME,SAMPADDR,SAMPDEVID,NAMETOMST) "
			       "VALUES (?,?,?,?,?,?,?)";

	for (int i = 0; i < _lists.size(); i++)
	{
		if (7!=_lists[i].size())
		{
			continue;
		}
		indexids << _lists[i][0].toInt();
		localaddrs << _lists[i][1].toInt();
		devids << _lists[i][2].toInt();
		names << _lists[i][3];
		// names << QString("%1").arg(_lists[i][3].toAscii().data());
		sampaddrs << _lists[i][4].toInt();
		sampdevids << _lists[i][5].toInt();
		nametomsts << _lists[i][6];
		// nametomsts << QString("%1").arg(_lists[i][6].toAscii().data());

		_count+=1;
		if (_count>=200||(i==(_lists.size()-1)))
		{
			try{
				query.prepare(_sql);
				query.addBindValue(indexids);
				query.addBindValue(localaddrs);
				query.addBindValue(devids);
				query.addBindValue(names);
				query.addBindValue(sampaddrs);
				query.addBindValue(sampdevids);
				query.addBindValue(nametomsts);

				if (!query.execBatch())
				{
					qDebug() << query.lastError();
				}
			}catch(...){
				qDebug() << query.lastError();
			}
			indexids.clear();
			localaddrs.clear();
		    devids.clear();
		    names.clear();
		    sampaddrs.clear();
		    sampdevids.clear();
		    nametomsts.clear();

		    _count = 0;
		}
	}
};

void inYt(QSqlDatabase &db,QString _path)
{
	QVector<QVector<QString> > _lists;
	readToVector(_path,_lists,",");

	QSqlQuery query(db);
	query.exec("DELETE FROM s101yt");

	QVariantList indexids;
	QVariantList localaddrs;
	QVariantList devids;
	QVariantList names;
	QVariantList sampaddrs;
	QVariantList sampdevids;
	QVariantList nametomsts;

	int _count = 0;
	QString _sql = "INSERT INTO s101yt (INDEXID,LOCALADDR,DEVID,NAME,SAMPADDR,SAMPDEVID,NAMETOMST) "
			       "VALUES (?,?,?,?,?,?,?)";

	for (int i = 0; i < _lists.size(); i++)
	{
		if (7!=_lists[i].size())
		{
			continue;
		}
		indexids << _lists[i][0].toInt();
		localaddrs << _lists[i][1].toInt();
		devids << _lists[i][2].toInt();
		names << _lists[i][3];
		// names << QString("%1").arg(_lists[i][3].toAscii().data());
		sampaddrs << _lists[i][4].toInt();
		sampdevids << _lists[i][5].toInt();
		nametomsts << _lists[i][6];
		// nametomsts << QString("%1").arg(_lists[i][6].toAscii().data());

		_count+=1;
		if (_count>=200||(i==(_lists.size()-1)))
		{
			try{
				query.prepare(_sql);
				query.addBindValue(indexids);
				query.addBindValue(localaddrs);
				query.addBindValue(devids);
				query.addBindValue(names);
				query.addBindValue(sampaddrs);
				query.addBindValue(sampdevids);
				query.addBindValue(nametomsts);

				if (!query.execBatch())
				{
					qDebug() << query.lastError();
				}
			}catch(...){
				qDebug() << query.lastError();
			}
			indexids.clear();
			localaddrs.clear();
		    devids.clear();
		    names.clear();
		    sampaddrs.clear();
		    sampdevids.clear();
		    nametomsts.clear();

		    _count = 0;
		}
	}
};

void InOrOutConf::scvToDB()
{
	QString _dbn = this->pathEdit->text();
	QFile _file(_dbn);
	if (!_file.exists())
	{
		warLabel->setText("db isn't exist!");
		return;
	}

	QSqlDatabase db;
	if(!checkdb_etconf(db,_dbn))
	{
		warLabel->setText("db isn't table we need!");
		return;
	}
	warLabel->setText("csv to db runing!");
	inYc(db,this->dirEdit->text()+divPath+"s101yc.csv");
	inYx(db,this->dirEdit->text()+divPath+"s101yx.csv");
	inYk(db,this->dirEdit->text()+divPath+"s101yk.csv");
	inYt(db,this->dirEdit->text()+divPath+"s101yt.csv");
	warLabel->setText("csv to db finish!");
	db.close();
};

bool writeListInfo(QVector<QString> list,const QString path,bool appendf)
{
    QFile f(path);
    if(!f.open(QFile::WriteOnly | QFile::Text | (appendf?QFile::Append:QFile::Truncate)))
        return false;

    QTextStream out(&f);

    // out.setCodec("UTF-8"); //中文编码
    for (int i = 0; i < list.size(); i++)
    {
        out << QString(list[i]);
    }
    f.close();
    return true;
};

void outYc(QSqlDatabase &db,QString _path)
{
	QSqlQuery query(db);

	QString _sql = "select INDEXID,DEVID,NAME,LOCALADDR,COEF,THV,NAMETOMST,ZEROVAL,SAMPADDR,SAMPDEVID,EXPLAIN from s101yc";
	query.prepare(_sql);
	query.exec();
	
	QVector<QString> list;
	QString _sb =  QObject::tr("shebei");
	QString _cj = QObject::tr("caiji");
	while (query.next()) {
		QString _line = "";
		for (int i = 0; i < 11; i++)
		{
			_line+=query.value(i).toString();
			if (i!=10)
			{
				_line+=",";
			}
		}
		_line+="\n";
		// _line = QString("%1").arg(ASCII2UTF_8(_line.toStdString()).c_str());
		// _line.replace(QString("??"), _sb);
		// _line.replace(QString("?"), _cj);
		list.push_back(_line);
		// char *buf= new char[512];
		// buf = G2U(_line.toStdString().c_str());
		// list.push_back( QString("%1").arg(buf));
		// qDebug()<<"_line="<<_line<<"\n";
		// qDebug()<<"_line_utf="<<QString("%1").arg(buf)<<"\n";
		if (list.size()>1000)
		{
			writeListInfo(list,_path,true);
			list.clear();
		}
	}
	writeListInfo(list,_path,true);
	list.clear();
};

void outYx(QSqlDatabase &db,QString _path)
{
	QSqlQuery query(db);

	QString _sql = "select INDEXID,DEVID,NAME,LOCALADDR,\"NOT\",SAMPDEVID,SAMPADDR,NAMETOMST from s101yx";
	query.prepare(_sql);
	query.exec();
	
	QVector<QString> list;
	while (query.next()) {
		QString _line = "";
		for (int i = 0; i < 8; i++)
		{
			_line+=query.value(i).toString();
			if (i!=7)
			{
				_line+=",";
			}
		}
		_line+="\n";
		// _line = QString("%1").arg(ASCII2UTF_8(_line.toStdString()).c_str());
		// _line.replace(QString("??"), QObject::tr("shebei"));
		// _line.replace(QString("?"), QObject::tr("caiji"));
		list.push_back(_line);
		// char *buf= new char[512];
		// buf = G2U(_line.toStdString().c_str());
		// list.push_back( QString("%1").arg(buf));
		// qDebug()<<"_line="<<_line<<"\n";
		// qDebug()<<"_line_utf="<<QString("%1").arg(buf)<<"\n";
		if (list.size()>1000)
		{
			writeListInfo(list,_path,true);
			list.clear();
		}
	}
	writeListInfo(list,_path,true);
	list.clear();
};

void outYk(QSqlDatabase &db,QString _path)
{
	QSqlQuery query(db);

	QString _sql = "select INDEXID,LOCALADDR,DEVID,NAME,SAMPADDR,SAMPDEVID,NAMETOMST from s101yk";
	query.prepare(_sql);
	query.exec();
	
	QVector<QString> list;
	while (query.next()) {
		QString _line = "";
		for (int i = 0; i < 7; i++)
		{
			_line+=query.value(i).toString();
			if (i!=6)
			{
				_line+=",";
			}
		}
		_line+="\n";
		// _line = QString("%1").arg(ASCII2UTF_8(_line.toStdString()).c_str());
		// _line.replace(QString("??"), QObject::tr("shebei"));
		// _line.replace(QString("?"), QObject::tr("caiji"));
		list.push_back(_line);
		// char *buf= new char[512];
		// buf = G2U(_line.toStdString().c_str());
		// list.push_back( QString("%1").arg(buf));
		// qDebug()<<"_line="<<_line<<"\n";
		// qDebug()<<"_line_utf="<<QString("%1").arg(buf)<<"\n";
		if (list.size()>1000)
		{
			writeListInfo(list,_path,true);
			list.clear();
		}
	}
	writeListInfo(list,_path,true);
	list.clear();
};

void outYt(QSqlDatabase &db,QString _path)
{
	QSqlQuery query(db);

	QString _sql = "select INDEXID,LOCALADDR,DEVID,NAME,SAMPADDR,SAMPDEVID,NAMETOMST from s101yt";
	query.prepare(_sql);
	query.exec();
	
	QVector<QString> list;
	while (query.next()) {
		QString _line = "";
		for (int i = 0; i < 7; i++)
		{
			_line+=query.value(i).toString();
			if (i!=6)
			{
				_line+=",";
			}
		}
		_line+="\n";
		// _line = QString("%1").arg(ASCII2UTF_8(_line.toStdString()).c_str());
		// _line.replace(QString("??"), QObject::tr("shebei"));
		// _line.replace(QString("?"), QObject::tr("caiji"));
		list.push_back(_line);
		// char *buf= new char[512];
		// buf = G2U(_line.toStdString().c_str());
		// list.push_back( QString("%1").arg(buf));
		// qDebug()<<"_line="<<_line<<"\n";
		// qDebug()<<"_line_utf="<<QString("%1").arg(buf)<<"\n";
		if (list.size()>1000)
		{
			writeListInfo(list,_path,true);
			list.clear();
		}
	}
	writeListInfo(list,_path,true);
	list.clear();
};
void InOrOutConf::DBToCsv()
{
	QString _dbn = this->pathEdit->text();
	QFile _file(_dbn);
	if (!_file.exists())
	{
		warLabel->setText("db isn't exist!");
		return;
	}
	// s101yc * ycs = new s101yc[10];
	// int ret = GetS101yc(_dbn.toStdString().c_str(),"",ycs,10);
	// if(ret>0){
	// 	for (int i = 0; i < ret; i++)
	// 	{
	// 		qDebug() <<  QString("%1").arg(ycs[i].NAME)<<"\n";
	// 		qDebug() <<  QString("%1").arg(G2U(ycs[i].NAME))<<"\n";
	// 		qDebug() <<  QString("%1").arg(U2G(ycs[i].NAME))<<"\n";
	// 		qDebug() <<  QString("%1").arg(ASCII2UTF_8(std::string(ycs[i].NAME)).c_str())<<"\n";
	// 		qDebug() <<  QString("%1").arg(UTF_82ASCII(std::string(ycs[i].NAME)).c_str())<<"\n";
	// 	}
	// }

	QSqlDatabase db;
	if(!checkdb_etconf(db,_dbn))
	{
		warLabel->setText("db isn't table we need!");
		return;
	}
	warLabel->setText("db to csv runing!");
	outYc(db,this->dirEdit->text()+divPath+"s101yc.csv");
	outYx(db,this->dirEdit->text()+divPath+"s101yx.csv");
	outYk(db,this->dirEdit->text()+divPath+"s101yk.csv");
	outYt(db,this->dirEdit->text()+divPath+"s101yt.csv");
	warLabel->setText("db to csv finish!");
	db.close();
};

main.cpp

#include <QApplication>
#include <QTranslator>
#include <QTextCodec>

#include "view/inOrOutConf.h"
//主函数入口
int main(int argc, char *argv[])
{
	//app构造
    QApplication app(argc, argv);

    //languages translation, main event is translate Marco tr("")
    QTranslator translator;
    //装载翻译文件
    //lupdate *.pro导出源文代码
    translator.load(":/languages/dbInOrOut_cn.qm");
    //app.setFont(QFont("wenquanyi")); //set font stype lib
    app.installTranslator(&translator);
    // //设置本地语言
    // QTextCodec::setCodecForLocale(QTextCodec::codecForLocale());
    // QTextCodec::setCodecForCStrings(QTextCodec::codecForLocale());
    // QTextCodec::setCodecForTr(QTextCodec::codecForLocale());

    InOrOutConf w;
    w.show();
	return app.exec();
}

四、编译及测试

        qmake -o Makefile dbIntOrOut.pro && make debug | make release(win use nmake)

        运行效果如下:

python将sql文件转换成csv sql文件转csv文件_QSQLite_02

 五、附件

        上面已近给出了全部源码,如果还是无法建立工程