Mysql API / C/C++ 연동하기 강좌 (6. mysql c++클래스 연동 예제 / 도서관리)

Mysql API / C/C++ 연동하기 강좌 (4. C/C++ Mysql Class 소스) 에서 작성한 클래스를 기반으로 mysql과 연동되는 간단한 도서만 입출력 및 저장수정 되는 기능을 구현해 보았습니다.

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// CUser.h
 
#pragma once
 
#include "iostream"
#include "stdlib.h"
#include "CMysql.h"
 
class CBook
{
    int secNo1;
    int secNo2;
    int bookNo;
    char* bookName;
    char* writer;
    char* company;
public:
    CBook(int s1, int s2, int bn, char*ba, char*wt, char*com);
    virtual ~CBook();
    int getSecNo1() { return secNo1; }
    int getSecNo2() { return secNo2; }
    int getbookNo() { return bookNo; }
    char* getbookName() { return bookName; }
    char* getwriter() { return writer; }
    char* getcompany() { return company; }
    void print();
};
 
class CBookManager
{
    CBook *book[MAX_PATH];
    CMysql mysql;
    bool bstate;
    int maxRow;
public:
    CBookManager();
    virtual ~CBookManager(){}
    void bookPrint();
    bool searchBook(char* bookName);
    bool insertBook(int secNo1, int secNo2, 
                                       int bookNo, char* bookName, 
                                       char* writer, char* company);
    bool deleteBook(char* bookName);
    bool AllSaveToDB();
    bool DBDisconnect();
    bool DBConnect();
};
 
 
// CUser.cpp
 
#include "stdafx.h"
#include "CUser.h"
 
//////////////////////////////////////////////
CBook::CBook(int s1=0, int s2=0, int bn=0, 
                       char*ba="bookName", char*wt="writer",
                       char*com="company")
{
    secNo1 = s1;
    secNo2 = s2;
    bookNo = bn;
    bookName = new char[20];
    writer = new char[20];
    company = new char[20];
 
    strcpy_s(bookName, 20, ba);
    strcpy_s(writer, 20, wt);
    strcpy_s(company, 20, com);
}
CBook::~CBook()
{
    delete bookName, writer, company;
}
 
void CBook::print()
{
    printf("|  %d   |   %d   |   %d   |   %s   |   %s   |   %s\n", secNo1, secNo2, bookNo, bookName, writer, company);
    cout << "+--------------------------------------------------------------------------+" << endl;
}
 
//////////////////////////////////////////////////////
CBookManager::CBookManager()
{
    bstate = false;
    maxRow = 0;
}
bool CBookManager::DBDisconnect()
{
    if(bstate)
    {
        mysql.Disconnect();
        return true;
    }
    return false;
}
bool CBookManager::DBConnect()
{
    if(mysql.Connect("localhost","root","******","bbs"))
    {
        mysql.SelectDB("bbs");
        mysql.Query("select *from book");
        mysql.First();
        int i = 0;
        while(!mysql.IsEOF())
        {
            book[i] = new CBook(atoi(mysql["secNo1"]), atoi(mysql["secNo2"]), atoi(mysql["bookNo"]),
                                mysql["bookName"], mysql["writer"], mysql["company"]);
            mysql.Next();
            i++;
        }
        maxRow = i;
        DBDisconnect();
        return true;
    }
    return false;
}
void CBookManager::bookPrint()
{
    cout << "+--------------------------------------------------------------------------+" << endl;
    cout << "+  No  |  SecNo1  |  SecNo2  |  bookNo  |  bookName  |  Writer  |  Company +" << endl;
    cout << "+--------------------------------------------------------------------------+" << endl;
    for(int i = 0; i<maxRow; i++)
    {
        book[i]->print();
    }
}
bool CBookManager::searchBook(char *bookName)
{
    for(int i = 0; i<maxRow; i++)
    {
        if(strncmp(book[i]->getbookName(), bookName, strlen(bookName)) == 0)
        {
            cout << "+---------------------------------------+" << endl;
            cout << "+ 도서번호 : " << book[i]->getbookNo() << endl;
            cout << "+ 도 서 명 : " << book[i]->getbookName() << endl;
            cout << "+ 저    자 : " << book[i]->getbookName() << endl;
            cout << "+ 출 판 사 : " << book[i]->getbookName() << endl;
            cout << "+---------------------------------------+" << endl;
            return true;
        }
    }
    cout << "+ 검색실패 : 찾으시는 도서가 없습니다" << endl << endl;
    return false;
}
bool CBookManager::insertBook(int secNo1, int secNo2, int bookNo, char* bookName, char* writer, char* company)
{
    for(int i = 0; i<maxRow; i++)
    {
        if(strncmp(book[i]->getbookName(), bookName, strlen(bookName)) == 0 || book[i]->getbookNo() == bookNo)
        {
            cout << "+ 중복되는 도서가 있어, 입력을 취소합니다." << endl << endl;
            cout << "+--------------------------------------------------------------------------+" << endl;
            cout << "+  No  |  SecNo1  |  SecNo2  |  bookNo  |  bookName  |  Writer  |  Company +" << endl;
            cout << "+--------------------------------------------------------------------------+" << endl;
            book[i]->print();
            return false;
        }
    }
    if(MAX_PATH > maxRow)
    {
        book[maxRow++] = new CBook(secNo1, secNo2, bookNo, bookName, writer, company);
        cout << "+ 도서가 등록되었습니다" << endl << endl;
        return true;
    }
    else
    {
        cout << "+ 자료 입력할 공간이 부족합니다" << endl << endl;
        return false;
    }
}
bool CBookManager::deleteBook(char* bookName)
{
    for(int i = 0; i<maxRow; i++)
    {
        if(strncmp(book[i]->getbookName(), bookName, strlen(bookName)) == 0)
        {
            for(int j = i; j<maxRow-1; j++)
                this->book[j] = this->book[j+1];
            
            cout << "+ 자료가 삭제되었습니다" << endl << endl;
            maxRow--;
            return true;
        }
    }
    cout << "+ 삭제실패 : 찾으시는 도서가 없습니다" << endl << endl;
    return false;
}
bool CBookManager::AllSaveToDB()
{
    char str[256];
    if(mysql.Connect("localhost","root","******","bbs"))
    {
        mysql.Query("delete from book");
        for(int i = 0; i<maxRow; i++)
        {
            sprintf(str, "insert into book value(%d,%d,%d,%d,'%s','%s','%s')",i+1, 
                book[i]->getSecNo1(), book[i]->getSecNo2(), book[i]->getbookNo(),
                book[i]->getbookName(), book[i]->getwriter(), book[i]->getcompany());
            mysql.Query(str);
        }
        DBDisconnect();
        return true;;
    }
    else
    {
        cout << "+ DB연결이 되지 않습니다." << endl << endl;
        return false;
    }
}
//////////////////////////////////////////////////////
 
 
// main.cpp
 
// BookManager.cpp : 콘솔 응용 프로그램에 대한 진입점을 정의합니다.
//
 
#include "stdafx.h"
 
 
int _tmain(int argc, _TCHAR* argv[])
{
    CBookManager *bm = new CBookManager();
    if(!bm->DBConnect())
    {
        cout << "연결 에러!" << endl;
        exit(1);
    }
    int a,b,c; char q[10], w[10], e[10], i;
 
    cout << "+------------------------------------+" << endl;
    cout << "+    C++ / MySql 클래스 제작 예제    +" << endl;
    cout << "+              Visual Studio 2008    +" << endl;
    cout << "+                MySql ver 5.1.41    +" << endl;
    cout << "+                     by Copynull    +" << endl;
    cout << "+------------------------------------+" << endl;
 
    while(1)
    {
        cout << "  1. 도서 입력" << endl;
        cout << "  2. 도서 삭제" << endl;
        cout << "  3. 도서 검색" << endl;
        cout << "  4. 도서 출력" << endl;
        cout << "  5. 도서 저장" << endl;
        cout << "  6. 종료 하기" << endl;
    
        cout << "->"; i = getch(); cout << i << endl;
        switch(i)
        {
        case '1':
            cout << "secNo1 : "; cin >> a;
            cout << "secNo2 : "; cin >> b;
            cout << "bookNo : "; cin >> c;
            cout << "bookName : "; cin >> q;
            cout << "writer : "; cin >> w;
            cout << "company : "; cin >> e;
            bm->insertBook(a,b,c,q,w,e);
            break;
        case '2':
            cout << "삭제할 도서명 입력 : "; cin >> q;
            bm->deleteBook(q);
            break;
        case '3':
            cout << "검색할 도서명 입력 : "; cin >> q;
            bm->searchBook(q);
            break;
        case '4':
            bm->bookPrint();
            break;
        case '5':
            if(bm->AllSaveToDB())
                cout << "모든 데이터 저장완료!" << endl << endl;
            else
                cout << "저장 에러!" << endl << endl;
            break;
        case '6':
            cout << endl << " + Make : copynull@nate.com" << endl;
            cout << " + Date : 2009. 12. 15" << endl << endl;
            bm->DBDisconnect();
            exit(1);
            break;
        default:
            cout << "잘못 입력하셨습니다" << endl;
            break;
        }
    }
    return 0;
}

프로젝트 소스 파일 전체를 공개합니다.  또한 소스는 vs2008 버전으로 작성되었음을 밝힙니다.
테이블 정보는 아래와 같습니다.

BookManager.zip