- //下面的代码是一个实现C++连接MYSQL数据库的很好的例子
- //这里用了建表,插入,检索,删表等常用功能
- //我用VC++6.0生成,已经成功连接了。
- //在VC++6.0中要想把做一下两步准备工作才可以。
- //(1)Tools->Options->Directories->Include files中添加C:\Program Files\MySQL\MySQL Server 6.0\include
- //(2)Tools->Options->Directories->Library files中添加C:\Program Files\MySQL\MySQL Server 6.0\lib\opt
- //其实就是将头文件和库文件包含进来
- //我觉得这个例子写的很好,再结合自己的试验,特地介绍给大家!
- #include <winsock.h>
- #include <iostream>
- #include <string>
- #include <mysql.h>
- using namespace std;
- #pragma comment(lib, "ws2_32.lib")
- #pragma comment(lib, "libmysql.lib")
- //单步执行,不想单步执行就注释掉
- #define STEPBYSTEP
- int main() {
- cout << "****************************************" << endl;
- #ifdef STEPBYSTEP
- system("pause");
- #endif
- //必备的一个数据结构
- MYSQL mydata;
- //初始化数据库
- if (0 == mysql_library_init(0, NULL, NULL)) {
- cout << "mysql_library_init() succeed" << endl;
- } else {
- cout << "mysql_library_init() failed" << endl;
- return -1;
- }
- #ifdef STEPBYSTEP
- system("pause");
- #endif
- //初始化数据结构
- if (NULL != mysql_init(&mydata)) {
- cout << "mysql_init() succeed" << endl;
- } else {
- cout << "mysql_init() failed" << endl;
- return -1;
- }
- #ifdef STEPBYSTEP
- system("pause");
- #endif
- //在连接数据库之前,设置额外的连接选项
- //可以设置的选项很多,这里设置字符集,否则无法处理中文
- if (0 == mysql_options(&mydata, MYSQL_SET_CHARSET_NAME, "gbk")) {
- cout << "mysql_options() succeed" << endl;
- } else {
- cout << "mysql_options() failed" << endl;
- return -1;
- }
- #ifdef STEPBYSTEP
- system("pause");
- #endif
- //连接数据库
- if (NULL
- != mysql_real_connect(&mydata, "localhost", "root", "test", "test",
- 3306, NULL, 0))
- //这里的地址,用户名,密码,端口可以根据自己本地的情况更改
- {
- cout << "mysql_real_connect() succeed" << endl;
- } else {
- cout << "mysql_real_connect() failed" << endl;
- return -1;
- }
- #ifdef STEPBYSTEP
- system("pause");
- #endif
- //sql字符串
- string sqlstr;
- //创建一个表
- sqlstr = "CREATE TABLE IF NOT EXISTS user_info";
- sqlstr += "(";
- sqlstr +=
- "user_id INT UNSIGNED NOT NULL AUTO_INCREMENT PRIMARY KEY COMMENT 'Unique User ID',";
- sqlstr +=
- "user_name VARCHAR(100) CHARACTER SET gb2312 COLLATE gb2312_chinese_ci NULL COMMENT 'Name Of User',";
- sqlstr +=
- "user_second_sum INT UNSIGNED NOT NULL DEFAULT 0 COMMENT 'The Summation Of Using Time'";
- sqlstr += ");";
- if (0 == mysql_query(&mydata, sqlstr.c_str())) {
- cout << "mysql_query() create table succeed" << endl;
- } else {
- cout << "mysql_query() create table failed" << endl;
- mysql_close(&mydata);
- return -1;
- }
- #ifdef STEPBYSTEP
- system("pause");
- #endif
- //向表中插入数据
- sqlstr =
- "INSERT INTO user_info(user_name) VALUES('公司名称'),('一级部门'),('二级部门'),('开发小组'),('姓名');";
- if (0 == mysql_query(&mydata, sqlstr.c_str())) {
- cout << "mysql_query() insert data succeed" << endl;
- } else {
- cout << "mysql_query() insert data failed" << endl;
- mysql_close(&mydata);
- return -1;
- }
- #ifdef STEPBYSTEP
- system("pause");
- #endif
- //显示刚才插入的数据
- sqlstr = "SELECT user_id,user_name,user_second_sum FROM user_info";
- MYSQL_RES *result = NULL;
- if (0 == mysql_query(&mydata, sqlstr.c_str())) {
- cout << "mysql_query() select data succeed" << endl;
- //一次性取得数据集
- result = mysql_store_result(&mydata);
- //取得并打印行数
- int rowcount = mysql_num_rows(result);
- cout << "row count: " << rowcount << endl;
- //取得并打印各字段的名称
- unsigned int fieldcount = mysql_num_fields(result);
- MYSQL_FIELD *field = NULL;
- for (unsigned int i = 0; i < fieldcount; i++) {
- field = mysql_fetch_field_direct(result, i);
- cout << field->name << "\t\t";
- }
- cout << endl;
- //打印各行
- MYSQL_ROW row = NULL;
- row = mysql_fetch_row(result);
- while (NULL != row) {
- for (int i = 0; i < fieldcount; i++) {
- cout << row[i] << "\t\t";
- }
- cout << endl;
- row = mysql_fetch_row(result);
- }
- } else {
- cout << "mysql_query() select data failed" << endl;
- mysql_close(&mydata);
- return -1;
- }
- #ifdef STEPBYSTEP
- system("pause");
- #endif
- //删除刚才建的表
- sqlstr = "DROP TABLE user_info";
- if (0 == mysql_query(&mydata, sqlstr.c_str())) {
- cout << "mysql_query() drop table succeed" << endl;
- } else {
- cout << "mysql_query() drop table failed" << endl;
- mysql_close(&mydata);
- return -1;
- }
- mysql_free_result(result);
- mysql_close(&mydata);
- mysql_server_end();
- system("pause");
- return 0;
- }
来源: http://www.phpxs.com/code/1004352/