报错：MFC连接mysql找不到指定的模块

错误提示：MFC连接mysql时出现Authentication plugin 'caching_sha2_password' cannot be loaded: 找不到指定的模块。

将abc@123换成自己的密码

之后关闭命令行,再次连接mysql即可

//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 STEPBYSTEPsystem("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 STEPBYSTEPsystem("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 STEPBYSTEPsystem("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 STEPBYSTEPsystem("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 STEPBYSTEPsystem("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 STEPBYSTEPsystem("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 STEPBYSTEPsystem("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 = 0i <fieldcounti++) {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 = 0i <fieldcounti++) {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 STEPBYSTEPsystem("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}

应该是字符集的问题, 这个语句的字符集应该是 GB2312

连接的时候或者执行之前要先设置字符集,比如下边这句试一下:mysql_query("set names gb2312")

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