Linux下C++连接操作MySQL数据库环境搭建
日期 版本 作者 修改内容 备注
2017年4月8日 V1.0 刘胜军 文件初建 无
一、引言
1.1 编写目的
Linux下C++连接操作MySQL数据库环境搭建
1.2 术语
gcc/gcc-c++:
The GNU Compiler Collection includes front ends for C, C++, Objective-C, Fortran, Ada, and Go, as well as libraries for these languages (libstdc++,...). GCC was originally written as the compiler for the GNU operating system. The GNU system was developed to be 100% free software, free in the sense that it respects the user's freedom.
boost/boost-devel:
Boost provides free peer-reviewed portable C++ source libraries.
mysql-connector-c++:
All distributions of Connector/C++ contain a README file, which contains platform-specific notes. At the end of the README file contained in the binary distribution you will find the settings used to build the binaries. If you experience build-related issues on a platform, it may help to check the settings used on the platform to build the binary.
1.3 准备工作
一台安装有CentOS 7.X OS的机器，可连接互联网，或备有离线安装包。
1.4 注意事项
使用yum源安装时，需正确配置yum源。
二、依赖环境搭建
2.1 安装gcc-c++
方法一：使用yum源
[root@user ~]# yum install -y gcc-c++
方法二：使用本地rpm
rpm -ivh libgcc-4.8.5-11.el7.x86_64.rpm --force --nodeps rpm -ivh glibc-common-2.17-157.el7_3.1.x86_64.rpm --force --nodeps rpm -ivh glibc-2.17-157.el7_3.1.x86_64.rpm --force --nodeps rpm -ivh mpfr-3.1.1-4.el7.x86_64.rpm --force --nodeps rpm -ivh libmpc-1.0.1-3.el7.x86_64.rpm --force --nodeps rpm -ivh libstdc++-4.8.5-11.el7.x86_64.rpm --force --nodeps rpm -ivh libstdc++-devel-4.8.5-11.el7.x86_64.rpm --force --nodeps rpm -ivh cpp-4.8.5-11.el7.x86_64.rpm --force --nodeps rpm -ivh libgomp-4.8.5-11.el7.x86_64.rpm --force --nodeps rpm -ivh kernel-headers-3.10.0-514.10.2.el7.x86_64.rpm --force --nodeps rpm -ivh glibc-headers-2.17-157.el7_3.1.x86_64.rpm --force --nodeps rpm -ivh glibc-devel-2.17-157.el7_3.1.x86_64.rpm --force --nodeps rpm -ivh gcc-4.8.5-11.el7.x86_64.rpm --force --nodeps rpm -ivh gcc-c++-4.8.5-11.el7.x86_64.rpm --force --nodeps
2.2 安装boost-devel
方法一：使用yum源
[root@user ~]# yum install -y boost-devel
方法二：使用本地rpm
rpm -ivh boost-system-1.53.0-26.el7.x86_64.rpm --force --nodeps rpm -ivh boost-chrono-1.53.0-26.el7.x86_64.rpm --force --nodeps rpm -ivh boost-filesystem-1.53.0-26.el7.x86_64.rpm --force --nodeps rpm -ivh boost-thread-1.53.0-26.el7.x86_64.rpm --force --nodeps rpm -ivh libicu-50.1.2-15.el7.x86_64.rpm --force --nodeps rpm -ivh boost-regex-1.53.0-26.el7.x86_64.rpm --force --nodeps rpm -ivh boost-date-time-1.53.0-26.el7.x86_64.rpm --force --nodeps rpm -ivh boost-wave-1.53.0-26.el7.x86_64.rpm --force --nodeps rpm -ivh boost-graph-1.53.0-26.el7.x86_64.rpm --force --nodeps rpm -ivh boost-locale-1.53.0-26.el7.x86_64.rpm --force --nodeps rpm -ivh boost-timer-1.53.0-26.el7.x86_64.rpm --force --nodeps rpm -ivh boost-random-1.53.0-26.el7.x86_64.rpm --force --nodeps rpm -ivh boost-program-options-1.53.0-26.el7.x86_64.rpm --force --nodeps rpm -ivh boost-context-1.53.0-26.el7.x86_64.rpm --force --nodeps rpm -ivh boost-atomic-1.53.0-26.el7.x86_64.rpm --force --nodeps rpm -ivh boost-python-1.53.0-26.el7.x86_64.rpm --force --nodeps rpm -ivh boost-iostreams-1.53.0-26.el7.x86_64.rpm --force --nodeps rpm -ivh boost-serialization-1.53.0-26.el7.x86_64.rpm --force --nodeps rpm -ivh boost-math-1.53.0-26.el7.x86_64.rpm --force --nodeps rpm -ivh boost-test-1.53.0-26.el7.x86_64.rpm --force --nodeps rpm -ivh boost-signals-1.53.0-26.el7.x86_64.rpm --force --nodeps rpm -ivh boost-1.53.0-26.el7.x86_64.rpm --force --nodeps rpm -ivh boost-devel-1.53.0-26.el7.x86_64.rpm --force --nodeps
2.3 安装mysql-connector-c++
下载地址：
https://dev.mysql.com/downloads/connector/cpp/
Connector/C++ 1.1.8
Looking for previous GA versions?
Select Operating System:
Linux - Generic
Select OS Version:
Linux - Generic (glibc 2.5) (x86, 64-bit)
安装：
rpm -ivh mysql-connector-c++-1.1.8-linux-glibc2.5-x86-64bit.rpm
三、测试
3.1 编写测试文件
[root@user ~]# cat Test.cpp
#include <iostream>
#include <mysql_connection.h>
#include <mysql_driver.h>
#include <cppconn/driver.h>
#include <cppconn/exception.h>
#include <cppconn/resultset.h>
#include <cppconn/statement.h>
using namespace std;
int main() {
try {
std::cout << "入口开始" << std::endl;
sql::mysql::MySQL_Driver *driver;
sql::Connection *con;
sql::Statement *stmt;
driver = sql::mysql::get_mysql_driver_instance();
std::cout << "连接数据库" << std::endl;
con = driver->connect("tcp://127.0.0.1:3306", "test", "test");
stmt = con->createStatement();
stmt->execute("USE test"); //选择使用的数据库
std::cout << "获取查询结果" << std::endl;
sql::ResultSet* result = stmt->executeQuery("select now() as time");
std::cout << "输出查询结果" << std::endl;
if (result) {
while (result->next()) {
cout << result->getString(1) << std::endl;
}
}
} catch (sql::SQLException &e) {
return -1;
}
}
3.2 编译测试文件
[root@user ~]# g++ -o test Test.cpp
3.3 测试
[root@user ~]# ./test 入口开始 连接数据库 获取查询结果 输出查询结果 2017-04-08 12:38:20
四、问题解析
4.1 问题一：undefined reference to `sql::mysql::get_driver_instance()'
[root@user ~]# g++ -o test Test.cpp /tmp/cc2gvcAt.o: In function `sql::mysql::get_mysql_driver_instance()': Test.cpp:(.text+0x5): undefined reference to `sql::mysql::get_driver_instance()' collect2: error: ld returned 1 exit status
解决方法：
[root@user ~]# g++ -o test Test.cpp -lmysqlcppconn [root@user ~]# ./test 入口开始 连接数据库 获取查询结果 输出查询结果 2017-04-08 12:45:14 [root@user ~]#