//下面的代碼是一個(gè)實(shí)現(xiàn)C++連接MYSQL數(shù)據(jù)庫(kù)的很好的例子
//這里用了建表，插入，檢索，刪表等常用功能
//我用VC++6.0生成，已經(jīng)成功連接了。
//在VC++6.0中要想把做一下兩步準(zhǔn)備工作才可以。
//(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
//其實(shí)就是將頭文件和庫(kù)文件包含進(jìn)來(lái)
//我覺(jué)得這個(gè)例子寫(xiě)的很好，再結(jié)合自己的試驗(yàn)，特地介紹給大家！

#include <winsock.h>
#include <iostream>
#include <string>
#include <mysql.h>
using namespace std;

#pragma comment(lib, "ws2_32.lib")
#pragma comment(lib, "libmysql.lib")

//單步執(zhí)行，不想單步執(zhí)行就注釋掉
#define STEPBYSTEP

int main() {
	cout << "****************************************" << endl;

#ifdef STEPBYSTEP
	system("pause");
#endif

	//必備的一個(gè)數(shù)據(jù)結(jié)構(gòu)
	MYSQL mydata;

	//初始化數(shù)據(jù)庫(kù)
	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

	//初始化數(shù)據(jù)結(jié)構(gòu)
	if (NULL != mysql_init(&mydata)) {
		cout << "mysql_init() succeed" << endl;
	} else {
		cout << "mysql_init() failed" << endl;
		return -1;
	}

#ifdef STEPBYSTEP
	system("pause");
#endif

	//在連接數(shù)據(jù)庫(kù)之前，設(shè)置額外的連接選項(xiàng)
	//可以設(shè)置的選項(xiàng)很多，這里設(shè)置字符集，否則無(wú)法處理中文
	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

	//連接數(shù)據(jù)庫(kù)
	if (NULL
			!= mysql_real_connect(&mydata, "localhost", "root", "test", "test",
					3306, NULL, 0))
			//這里的地址，用戶名，密碼，端口可以根據(jù)自己本地的情況更改
			{
		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;

	//創(chuàng)建一個(gè)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

	//向表中插入數(shù)據(jù)
	sqlstr =
			"INSERT INTO user_info(user_name) VALUES('公司名稱(chēng)'),('一級(jí)部門(mén)'),('二級(jí)部門(mén)'),('開(kāi)發(fā)小組'),('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

	//顯示剛才插入的數(shù)據(jù)
	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;

		//一次性取得數(shù)據(jù)集
		result = mysql_store_result(&mydata);
		//取得并打印行數(shù)
		int rowcount = mysql_num_rows(result);
		cout << "row count: " << rowcount << endl;

		//取得并打印各字段的名稱(chēng)
		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

	//刪除剛才建的表
	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;
}

標(biāo)簽： Mysql 代碼 數(shù)據(jù)庫(kù)

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