如何利用MySQL和C++开发一个简单的批量加密功能

CREATE TABLE `encrypt_data` (
  `id` INT(11) NOT NULL AUTO_INCREMENT,
  `data` VARCHAR(255),
  `encrypted_data` VARBINARY(255),
  PRIMARY KEY (`id`)
) ENGINE=InnoDB AUTO_INCREMENT=1 DEFAULT CHARSET=utf8;

#include <mysql_driver.h>
#include <mysql_connection.h>
#include <cppconn/statement.h>
#include <cppconn/prepared_statement.h>
#include <iostream>

using namespace std;

// 加密算法示例
string encrypt(string data) {
    // TODO: 实现自定义的加密算法
    return data;
}

int main() {
    sql::mysql::MySQL_Driver *driver;
    sql::Connection *con;

    driver = sql::mysql::get_mysql_driver_instance();
    con = driver->connect("tcp://127.0.0.1:3306", "username", "password");

    con->setSchema("database_name");

    sql::Statement *stmt;
    sql::ResultSet *res;

    stmt = con->createStatement();
    res = stmt->executeQuery("SELECT * FROM encrypt_data");

    while (res->next()) {
        int id = res->getInt("id");
        string data = res->getString("data");

        // 对数据进行加密
        string encryptedData = encrypt(data);

        // 更新数据库中的加密结果
        sql::PreparedStatement *updateStmt;
        updateStmt = con->prepareStatement("UPDATE encrypt_data SET encrypted_data = ? WHERE id = ?");
        updateStmt->setString(1, encryptedData);
        updateStmt->setInt(2, id);
        updateStmt->execute();
    }

    delete res;
    delete stmt;
    delete con;

    return 0;
}

g++ -o encrypt encrypt.cpp -lmysqlcppconn

./encrypt