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892天前//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; |
} |
