/*
* DB.h
*
* Created on: 2013-6-8
* Author: zhuang
*/
#ifndef _DB_H_
#define _DB_H_
#include "cocos2d.h"
// DB
#include "sqlite3.h"
using namespace cocos2d;
using namespace std;
class DB
{
public:
DB();
~DB();
static DB* sharedDB();
sqlite3 *pDB;//数据库指针
std::string sqlstr;//SQL指令
char * errMsg;//错误信息
int results;//sqlite3_exec返回值
bool OpenDBWithFileName(char *dbName);
bool CreateTableWithContent(char *dbExec);
bool IsTableExistedWithTableName(std::string dbExec);
bool GetTableDataWithContent(std::string dbExec);
bool InsertTableDataWithContent(std::string dbExec);
bool DeleteTableDataWithContent(std::string dbExec);
bool UpdateTableDataWithContent(std::string dbExec);
bool ClearTableData(std::string dbExec);
void CloseDB();
void DeleteTable(string sql,string name );
int GetPlayerInfoScores(std::string dbExec);
bool GetPassInfoIsUnlockedWithIndex(std::string dbExec);
int GetPassInfoStartsWithIndex(std::string dbExec);
};
#endif
DB.cpp
#include "DB.h"
DB::DB()
{
//=================DB========================[
pDB =NULL;//数据库指针
sqlstr="";//SQL指令
errMsg = NULL;//错误信息
results=-1;//sqlite3_exec返回值
}
DB::~DB()
{
}
DB* DB::sharedDB()
{
static DB sharedDb;
return &sharedDb;
}
/*
* //在数据库中判断名为name的表示否存在，如果不存在则创建这张表
//@示例语句string sqls = "create table user(id integer,username text,password text)";
*
* //删除表格
//@示例语句sqlstr="drop table name";
*
* **/
//====================================================================
//============================ 数据库 ====================================
//====================================================================
//打开一个数据库，如果该数据库不存在，则创建一个数据库文件
/*
* data.db
* */
bool DB::OpenDBWithFileName(char *dbName)
{
bool success=false;
std::string path = CCFileUtils::sharedFileUtils()->getWritablePath()
+ dbName;
int result = sqlite3_open(path.c_str(), &pDB);
if( result != SQLITE_OK )
{
CCLog("SQLITE_OK:%d",SQLITE_OK);
CCLog( "open db failed ，error :%d ，cause: %s " , result, errMsg );
success=false;
}else
{
CCLog( "open db success ");
success=true;
}
return success;
}
//创建表，设置ID为主键，且自动增加
//create table playerinfo( ID integer primary key autoincrement, playername nvarchar(32),playerscores int )
bool DB::CreateTableWithContent(char *dbExec)
{
bool success=false;
int result=sqlite3_exec( pDB, dbExec , NULL, NULL, &errMsg );
if( result != SQLITE_OK )
{
CCLog( "create table failed ，error :%d ，cause: %s " , result, errMsg );
success=false;
}
else
{
CCLog( "create table success ");
success=true;
}
return success;
}
//判断表是否存在
bool DB::IsTableExistedWithTableName(std::string dbExec)
{
bool success=false;
std::string dbExecs="";
dbExecs.append("select count(type) from sqlite_master where type='table' and name='");
dbExecs.append(dbExec);
dbExecs.append("'");
int result=sqlite3_exec( pDB, dbExecs.c_str() , NULL, NULL, &errMsg );
if( result != SQLITE_OK )
{
CCLog( "table not exist ");
success=false;
}
else
{
CCLog( "table is existed ");
success=true;
}
return success;
}
int isExisted( void * para, int n_column, char ** column_value, char ** column_name )
{
bool *isExisted_=(bool*)para;
*isExisted_=(**column_value)!='0';
return 0;
}
// 获取数据
bool DB::GetTableDataWithContent(std::string dbExec)
{
bool success=false;
int result = sqlite3_exec( pDB, dbExec.c_str() , NULL, NULL, &errMsg ); // loadRecord
if(result != SQLITE_OK )
{
CCLog( "get GetTableDataWithContent failed，error :%d ，cause:%s " , result, errMsg );
success=false;
}
else
{
CCLog( "get GetTableDataWithContent success ");
success=true;
}
return success;
}
//插入数据
//insert into playerinfo( playername,playerscores ) values ( '忘川之水', 683500 )
bool DB::InsertTableDataWithContent(std::string dbExec)
{
bool success=false;
int result = sqlite3_exec( pDB, dbExec.c_str() , NULL, NULL, &errMsg );
if(result != SQLITE_OK )
{
CCLog( "insert failed，error :%d ，cause:%s " , result, errMsg );
success=false;
}
else
{
CCLog( "insert success ");
success=true;
}
return success;
}
//删除数据 delete from playerinfo where playername = 'default2'
bool DB::DeleteTableDataWithContent(std::string dbExec)
{
bool success=false;
int result = sqlite3_exec( pDB, dbExec.c_str() , NULL, NULL, &errMsg );
if(result != SQLITE_OK )
{
CCLog( "delete failed，error :%d ，cause:%s " , result, errMsg );
success=false;
}
else
{
CCLog( "delete success ");
success=true;
}
return success;
}
//更新数据 update gamepass set passisunlocked=1 where passindex = 2
bool DB::UpdateTableDataWithContent(std::string dbExec)
{
bool success=false;
int result = sqlite3_exec( pDB, dbExec.c_str() , NULL, NULL, &errMsg );
if(result != SQLITE_OK )
{
CCLog( "update failed，error :%d ，cause:%s " , result, errMsg );
success=false;
}
else
{
CCLog( "update success ");
success=true;
}
return success;
}
// 清空数据
bool DB::ClearTableData(std::string dbExec)
{
bool success=false;
std::string dbExecs="";
dbExecs.append("delete from ");
dbExecs.append(dbExec);
dbExecs.append(" ");
int result = sqlite3_exec( pDB, dbExecs.c_str() , NULL, NULL, &errMsg );
if(result != SQLITE_OK )
{
CCLog( "clear failed，error:%d ，cause :%s " , result, errMsg );
success=false;
}
else
{
CCLog( " clear db success ");
success=true;
}
return success;
}
//关闭数据库
void DB::CloseDB()
{
sqlite3_close(pDB);
}
//=================================================
int DB::GetPlayerInfoScores(std::string dbExec)
{
bool success=false;
int scores=0;
sqlite3_stmt *statement=NULL;
int result = sqlite3_prepare(pDB, dbExec.c_str() , dbExec.length(), &statement, 0);
if(result != SQLITE_OK )
{
CCLog( "get GetPlayerInfo failed，error :%d ，cause:%s " , result, errMsg );
success=false;
}
else
{
CCLog( "get GetPlayerInfo success ");
success=true;
while(sqlite3_step(statement) == SQLITE_ROW)
{
scores=sqlite3_column_int(statement, 2);
};
}
return scores;
}
bool DB::GetPassInfoIsUnlockedWithIndex(std::string dbExec)
{
bool success=false;
bool isUnlocked=false;
sqlite3_stmt *statement=NULL;
int result = sqlite3_prepare(pDB, dbExec.c_str() , dbExec.length(), &statement, 0);
if(result != SQLITE_OK )
{
CCLog( "get GetPlayerInfo failed，error :%d ，cause:%s " , result, errMsg );
success=false;
}
else
{
CCLog( "get GetPlayerInfo success ");
success=true;
while(sqlite3_step(statement) == SQLITE_ROW)
{
(sqlite3_column_int(statement, 3)==1)?(isUnlocked=true):(isUnlocked=false);
};
}
return isUnlocked;
}
//select * from gamepass where passindex =2
int DB::GetPassInfoStartsWithIndex(std::string dbExec)
{
bool success=false;
int starts=0;
sqlite3_stmt *statement=NULL;
int result = sqlite3_prepare(pDB, dbExec.c_str() , dbExec.length(), &statement, 0);
if(result != SQLITE_OK )
{
CCLog( "get GetPlayerInfo failed，error :%d ，cause:%s " , result, errMsg );
success=false;
}
else
{
CCLog( "get GetPlayerInfo success ");
success=true;
while(sqlite3_step(statement) == SQLITE_ROW)
{
starts=sqlite3_column_int(statement, 3);
};
}
return starts;
}
//@示例语句sqlstr="drop table name";
void DB::DeleteTable(string sql,string name){
if (IsTableExistedWithTableName(name))
{
int result = sqlite3_exec(pDB,sql.c_str(),NULL,NULL,&errMsg);
if( result != SQLITE_OK )
CCLog( "创建表失败，错误码:%d ，错误原因:%s\n" , result, errMsg );
}
}
test
#include "HelloWorldScene.h"
#include "SimpleAudioEngine.h"
#include "DB.h"
using namespace cocos2d;
using namespace CocosDenshion;
CCScene* HelloWorld::scene()
{
// 'scene' is an autorelease object
CCScene *scene = CCScene::create();
// 'layer' is an autorelease object
HelloWorld *layer = HelloWorld::create();
// add layer as a child to scene
scene->addChild(layer);
// return the scene
return scene;
}
// on "init" you need to initialize your instance
bool HelloWorld::init()
{
//////////////////////////////
// 1. super init first
if ( !CCLayer::init() )
{
return false;
}
this->db();
/////////////////////////////
// 2. add a menu item with "X" image, which is clicked to quit the program
// you may modify it.
// add a "close" icon to exit the progress. it's an autorelease object
CCMenuItemImage *pCloseItem = CCMenuItemImage::create(
"CloseNormal.png",
"CloseSelected.png",
this,
menu_selector(HelloWorld::menuCloseCallback) );
pCloseItem->setPosition( ccp(CCDirector::sharedDirector()->getWinSize().width - 20, 20) );
// create menu, it's an autorelease object
CCMenu* pMenu = CCMenu::create(pCloseItem, NULL);
pMenu->setPosition( CCPointZero );
this->addChild(pMenu, 1);
/////////////////////////////
// 3. add your codes below...
// add a label shows "Hello World"
// create and initialize a label
CCLabelTTF* pLabel = CCLabelTTF::create("Hello World", "Thonburi", 34);
// ask director the window size
CCSize size = CCDirector::sharedDirector()->getWinSize();
// position the label on the center of the screen
pLabel->setPosition( ccp(size.width / 2, size.height - 20) );
// add the label as a child to this layer
this->addChild(pLabel, 1);
// add "HelloWorld" splash screen"
CCSprite* pSprite = CCSprite::create("HelloWorld.png");
// position the sprite on the center of the screen
pSprite->setPosition( ccp(size.width/2, size.height/2) );
// add the sprite as a child to this layer
this->addChild(pSprite, 0);
return true;
}
void HelloWorld::menuCloseCallback(CCObject* pSender)
{
CCDirector::sharedDirector()->end();
#if (CC_TARGET_PLATFORM == CC_PLATFORM_IOS)
exit(0);
#endif
}
void HelloWorld::db(){
// DB test
if(DB::sharedDB()->OpenDBWithFileName("save.db")) //打开一个数据库，如果该数据库不存在，则创建一个数据库文件
{
//创建表，设置ID为主键，且自动增加 ———— OK
DB::sharedDB()->CreateTableWithContent("create table playerinfo( ID integer primary key autoincrement, playername nvarchar(32),playerscores int ) ");
DB::sharedDB()->CreateTableWithContent("create table gamepass( ID integer primary key autoincrement, passindex int, passstarts int ,passisunlocked int ) ");
//插入数据 ———— OK
DB::sharedDB()->InsertTableDataWithContent(" insert into playerinfo( playername,playerscores ) values ( '北京', 683500 ) ");
DB::sharedDB()->InsertTableDataWithContent(" insert into playerinfo( playername,playerscores ) values ( '上海', 445555 ) ");
DB::sharedDB()->InsertTableDataWithContent(" insert into playerinfo( playername,playerscores ) values ( '深圳', 8556548 ) ");
DB::sharedDB()->InsertTableDataWithContent(" insert into gamepass( passindex,passstarts,passisunlocked ) values ( 1, 2, 1 ) ");
DB::sharedDB()->InsertTableDataWithContent(" insert into gamepass( passindex,passstarts,passisunlocked ) values ( 2, 3, 0 ) ");
DB::sharedDB()->InsertTableDataWithContent(" insert into gamepass( passindex,passstarts,passisunlocked ) values ( 3, 0, 0 ) ");
// 获取数据 ———— OK
int scores=DB::sharedDB()->GetPlayerInfoScores(" select * from playerinfo where playername ='default' ");
int starts=DB::sharedDB()->GetPassInfoStartsWithIndex(" select * from gamepass where passindex =2 ");
bool isLocked1=DB::sharedDB()->GetPassInfoIsUnlockedWithIndex(" select * from gamepass where passindex =1 ");
bool isLocked3=DB::sharedDB()->GetPassInfoIsUnlockedWithIndex(" select * from gamepass where passindex =3 ");
CCLog("= %d =",scores);
CCLog("= %d =",starts);
(isLocked1==true)?( CCLog("= has unlock =")):(CCLog("= is locked ="));
(isLocked3==true)?( CCLog("= has unlock =")):(CCLog("= is locked ="));
DB::sharedDB()->DeleteTable("drop table gamepass","gamepass");
// 删除数据 ———— OK
//DB::sharedDB()->DeleteTableDataWithContent("delete from playerinfo where playername = 'default2' ");
// 更新数据 ———— OK
//DB::sharedDB()->UpdateTableDataWithContent("update gamepass set passisunlocked=1 where passindex = 2 ");
//关闭数据库 ———— OK
DB::sharedDB()->CloseDB();
}
}
参考：http://blog.csdn.net/ym19860303/article/details/8531998
http://blog.sina.com.cn/s/blog_6b154dd301012ann.html