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這裡是我的學習筆記,陸續增加中。
http://kowala21.blogspot.com

2011-06-14

C++ & MySQL 中文問題III


為了解決 MySQL 使用UTF-8 的中文問題,今天尋找到另一個連接器 mysql++
下載原始碼,編譯,準備測試。。。
這個比較麻煩,要自己編譯,還要引用到 MySQL 的 .h 檔,這意味著您必須下載 MySQL Server 的 .h
來,開始玩吧!

首先,請先下載 mysql++-3.1.0.tar.gz 與 mysql-noinstall-5.1.51-win32.zip
在這 http://tangentsoft.net/mysql++ 下載 mysql++
分別解壓縮兩個檔案
先執行 mysql++ 專案

...\Desktop\mysql++-3.1.0\vc2008\mysql++.sln

後,在 mysql-noinstall-5.1.51-win32\include 中,找到下列檔案

mysql-noinstall-5.1.51-win32\include
mysql_version.h
mysql.h
mysql_com.h
mysql_time.h
my_list.h
typelib.h
my_alloc.h

mysql-noinstall-5.1.51-win32\lib\opt
libmysql.lib (這個需再專案屬性中指定所在路徑)

這些要跟您所用的MySQL版本配合,解壓縮到 mysql++-3.1.0\lib 之中,然後把 *.cpp 的符號

#include <mysql_version.h>

改成 

#include "mysql_version.h"

這樣就會找現行目錄了



編譯前先改成 Release,並指定專案屬性中 libmysql.lib 所在路徑
編譯完成的元件,會在目錄中

mysql++-3.1.0\vc2008\Release



我已經編譯好了,適用 mysql-5.1.51-win32

文件下載地址 (mysql 5.1.51.rar)

其他 MySQL 版本,請自行編譯。

改天找時間測試 UTF-8 看看。

這有一些使用的參考文章,是 mysql++ 內附的範例,剛剛在 google 找使用範例,
找了半天,才找到一兩個,突然想到去 mysql++ 裏頭找,果然有
節錄如下

/***********************************************************************
 simple1.cpp - Example showing the simplest way to get data from a MySQL
    table with MySQL++.

 Copyright (c) 1998 by Kevin Atkinson, (c) 1999-2001 by MySQL AB, and
 (c) 2004-2009 by Educational Technology Resources, Inc.  Others may
 also hold copyrights on code in this file.  See the CREDITS.txt file
 in the top directory of the distribution for details.

 This file is part of MySQL++.

 MySQL++ is free software; you can redistribute it and/or modify it
 under the terms of the GNU Lesser General Public License as published
 by the Free Software Foundation; either version 2.1 of the License, or
 (at your option) any later version.

 MySQL++ is distributed in the hope that it will be useful, but WITHOUT
 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public
 License for more details.

 You should have received a copy of the GNU Lesser General Public
 License along with MySQL++; if not, write to the Free Software
 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301
 USA
***********************************************************************/

#include "cmdline.h"
#include "printdata.h"

#include <mysql++.h>

#include <iostream>
#include <iomanip>

using namespace std;

int
main(int argc, char *argv[])
{
    // Get database access parameters from command line
    mysqlpp::examples::CommandLine cmdline(argc, argv);
    if (!cmdline) {
        return 1;
    }

    // Connect to the sample database.
    mysqlpp::Connection conn(false);
    if (conn.connect(mysqlpp::examples::db_name, cmdline.server(),
            cmdline.user(), cmdline.pass())) {
        // Retrieve a subset of the sample stock table set up by resetdb
        // and display it.
        mysqlpp::Query query = conn.query("select item from stock");
        if (mysqlpp::StoreQueryResult res = query.store()) {
            cout << "We have:" << endl;
            mysqlpp::StoreQueryResult::const_iterator it;
            for (it = res.begin(); it != res.end(); ++it) {
                mysqlpp::Row row = *it;
                cout << '\t' << row[0] << endl;
            }
        }
        else {
            cerr << "Failed to get item list: " << query.error() << endl;
            return 1;
        }

        return 0;
    }
    else {
        cerr << "DB connection failed: " << conn.error() << endl;
        return 1;
    }
}

/***********************************************************************
 simple2.cpp - Retrieves the entire contents of the sample stock table
    using a "store" query, and prints it out.

 Copyright (c) 1998 by Kevin Atkinson, (c) 1999-2001 by MySQL AB, and
 (c) 2004-2009 by Educational Technology Resources, Inc.  Others may
 also hold copyrights on code in this file.  See the CREDITS.txt file
 in the top directory of the distribution for details.

 This file is part of MySQL++.

 MySQL++ is free software; you can redistribute it and/or modify it
 under the terms of the GNU Lesser General Public License as published
 by the Free Software Foundation; either version 2.1 of the License, or
 (at your option) any later version.

 MySQL++ is distributed in the hope that it will be useful, but WITHOUT
 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public
 License for more details.

 You should have received a copy of the GNU Lesser General Public
 License along with MySQL++; if not, write to the Free Software
 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301
 USA
***********************************************************************/

#include "cmdline.h"
#include "printdata.h"

#include <mysql++.h>

#include <iostream>
#include <iomanip>

using namespace std;

int
main(int argc, char *argv[])
{
    // Get database access parameters from command line
    mysqlpp::examples::CommandLine cmdline(argc, argv);
    if (!cmdline) {
        return 1;
    }

    // Connect to the sample database.
    mysqlpp::Connection conn(false);
    if (conn.connect(mysqlpp::examples::db_name, cmdline.server(),
            cmdline.user(), cmdline.pass())) {
        // Retrieve the sample stock table set up by resetdb
        mysqlpp::Query query = conn.query("select * from stock");
        mysqlpp::StoreQueryResult res = query.store();

        // Display results
        if (res) {
            // Display header
            cout.setf(ios::left);
            cout << setw(31) << "Item" <<
                    setw(10) << "Num" <<
                    setw(10) << "Weight" <<
                    setw(10) << "Price" <<
                    "Date" << endl << endl;

            // Get each row in result set, and print its contents
            for (size_t i = 0; i < res.num_rows(); ++i) {
                cout << setw(30) << res[i]["item"] << ' ' <<
                        setw(9) << res[i]["num"] << ' ' <<
                        setw(9) << res[i]["weight"] << ' ' <<
                        setw(9) << res[i]["price"] << ' ' <<
                        setw(9) << res[i]["sdate"] <<
                        endl;
            }
        }
        else {
            cerr << "Failed to get stock table: " << query.error() << endl;
            return 1;
        }

        return 0;
    }
    else {
        cerr << "DB connection failed: " << conn.error() << endl;
        return 1;
    }
}


/***********************************************************************
 simple3.cpp - Example showing how to use the 'use' method of retrieving
    a table, as opposed to the more common 'store' method illustrated
    by the simple2 example.

 Copyright (c) 2005-2009 by Educational Technology Resources, Inc.
 Others may also hold copyrights on code in this file.  See the CREDITS
 file in the top directory of the distribution for details.

 This file is part of MySQL++.

 MySQL++ is free software; you can redistribute it and/or modify it
 under the terms of the GNU Lesser General Public License as published
 by the Free Software Foundation; either version 2.1 of the License, or
 (at your option) any later version.

 MySQL++ is distributed in the hope that it will be useful, but WITHOUT
 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public
 License for more details.

 You should have received a copy of the GNU Lesser General Public
 License along with MySQL++; if not, write to the Free Software
 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301
 USA
***********************************************************************/

#include "cmdline.h"
#include "printdata.h"

#include <mysql++.h>

#include <iostream>
#include <iomanip>

using namespace std;

int
main(int argc, char *argv[])
{
    // Get database access parameters from command line
    mysqlpp::examples::CommandLine cmdline(argc, argv);
    if (!cmdline) {
        return 1;
    }

    // Connect to the sample database.
    mysqlpp::Connection conn(false);
    if (conn.connect(mysqlpp::examples::db_name, cmdline.server(),
            cmdline.user(), cmdline.pass())) {
        // Ask for all rows from the sample stock table and display
        // them.  Unlike simple2 example, we retreive each row one at
        // a time instead of storing the entire result set in memory
        // and then iterating over it.
        mysqlpp::Query query = conn.query("select * from stock");
        if (mysqlpp::UseQueryResult res = query.use()) {
            // Display header
            cout.setf(ios::left);
            cout << setw(31) << "Item" <<
                    setw(10) << "Num" <<
                    setw(10) << "Weight" <<
                    setw(10) << "Price" <<
                    "Date" << endl << endl;

            // Get each row in result set, and print its contents
            while (mysqlpp::Row row = res.fetch_row()) {
                cout << setw(30) << row["item"] << ' ' <<
                        setw(9) << row["num"] << ' ' <<
                        setw(9) << row["weight"] << ' ' <<
                        setw(9) << row["price"] << ' ' <<
                        setw(9) << row["sdate"] <<
                        endl;
            }

            // Check for error: can't distinguish "end of results" and
            // error cases in return from fetch_row() otherwise.
            if (conn.errnum()) {
                cerr << "Error received in fetching a row: " <<
                        conn.error() << endl;
                return 1;
            }
            return 0;
        }
        else {
            cerr << "Failed to get stock item: " << query.error() << endl;
            return 1;
        }
    }
    else {
        cerr << "DB connection failed: " << conn.error() << endl;
        return 1;
    }
}

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