Linux::mysql-connector-c++

1、安装好boost。

2、从官网下载mysql connector c++版本。

3、解压，复制 include/jdbc/cppconn 文件夹复制，到/usr/local/include/cppconn目录。，其他.h文件到到/usr/local/include/。

4、复制lib64中库文件到/usr/local/lib/目录中。

#include "mysql_connection.h"
#include <cppconn/driver.h>
#include <cppconn/exception.h>
#include <cppconn/resultset.h>
#include <cppconn/statement.h>
#include <cppconn/prepared_statement.h>
#include <stdio.h>
using namespace std;

int main(void)
{
    sql::Driver *driver;
    sql::Connection *con;
    sql::Statement *stmt;
    sql::ResultSet *res;
    sql::PreparedStatement *pstmt;
    try {
        driver = get_driver_instance();
        con = driver->connect("tcp://127.00.1:3306", "root", "command");
        con->setSchema("viewfocus");
    }
    catch (sql::SQLException &e)
    {
        printf("error \n");
    }
    return 0;
}
---------------------------------------------------------
SRC += main.cpp
GCC = g++
FLAG = -lmysqlcppconn
CMS = CMS

demo:
    $(GCC)  -o $(CMS) -g $(SRC) $(FLAG)
clean:
    rm CMS

CMysqlConnectPtr mysqlMgr::CreateConnection()
{
    db_conf db = config::get_db_conf();

    bool b_true = true;
    char strHonst[100] = { '\0' };
    int  nTime_out = 10;
    snprintf(strHonst, sizeof(strHonst), "tcp://%s:%s", db.strDBIP.c_str(), db.strDBPort.c_str());
    spd::get("console")->info("{}", strHonst);
    sql::Connection *conn = driver->connect(strHonst, db.strDBUser.c_str(), db.strDBPswd.c_str());
    conn->setClientOption("OPT_CONNECT_TIMEOUT", &nTime_out);
    conn->setClientOption("OPT_RECONNECT", &b_true);
    conn->setClientOption("CLIENT_MULTI_RESULTS", &b_true);
    conn->setClientOption("OPT_CHARSET_NAME", "utf8");
    conn->setSchema(db.strDBName.c_str());
    std::shared_ptr<sql::Connection> sp(conn,[](sql::Connection *conn) {
        delete conn;
    });

    return sp;
}

//********************************************************************
// 函数名称: SyncExecSQL        
// 返 回 值: bool                --执行成功返回true, 否则返回false
// 参    数: FUNCCALL fun        --可以是回调函数，仿函数，lambda表达式 
// 函数说明: 同步执行一个数据库操作，
//********************************************************************
template<class FUNCCALL>
bool SyncExecSQL(FUNCCALL fun)
{
	bool bResult = false;

	CMysqlConnectPtr pDB = CreateConnection();
	if (!pDB)
	{
		spd::get("console")->info("{} {} {}", __FILE__, __LINE__,"SyncExecSQL(FUNCCALL fun)");
		return bResult;
	}
	try
	{
		fun(pDB);
		bResult = true;
	}
	catch (sql::SQLException &e)
	{
		spd::get("console")->info("{} {} {}", __FILE__, __LINE__, "sql::SQLException");
	}
	catch (...)
	{
	}
	return true;
}
 

void mysqlMgr::loadMonitor()
{
    cleanMap();

    string strSql = "SELECT Dev_Code, Video_Alarm_Type from m_monitor ";
    
    SyncExecSQL([&](CMysqlConnectPtr pDB)
    {
        try {
            std::unique_ptr<sql::PreparedStatement> pstmt(pDB->prepareStatement(strSql));
            std::unique_ptr<sql::ResultSet> res(pstmt->executeQuery());
            if (res)
            {
                while (res->next())
                {
                    int index = MYSQL_BASE_INDEX_1;
                    string devCode = res->getString(++index);
                    string alamType = res->getString(++index);
                   //todo
                }
            }
        }
        catch (sql::SQLException &e)
        {
            return false;
        }
        return true;
    });
}