import mysql.connector
class MysqlUtil:
    @staticmethod
    def connect_to_mysql(host,port,user,password,database):
        # 创建数据库连接
        connection = mysql.connector.connect(
            host=host,  # 数据库主机地址
            user=user,  # 数据库用户名
            port=port,
            password=password,  # 数据库密码
            database=database  # 数据库名称
        )
        return  connection

    @staticmethod
    def execute_sql(connection,query,params):
        if connection.is_connected():
            print('Connected to MySQL database')
            # 创建一个cursor对象，用于执行SQL语句
            cursor = connection.cursor()
            # 执行SQL查询
            cursor.execute(query,params)
            mysql_count = cursor.fetchone()[0]
            cursor.close()
            connection.close()
            print('MySQL connection is closed')
            return mysql_count

    @staticmethod
    def insert_data(connection, query, params):
        if connection.is_connected():
            print('Connected to MySQL database')
            # 创建一个cursor对象，用于执行SQL语句
            cursor = connection.cursor()
            try:
                # 执行插入数据的SQL语句
                cursor.execute(query, params)
                # 提交事务
                connection.commit()
                print("Data inserted successfully.")
                print(cursor.rowcount)   # 返回影响的行数
            except mysql.connector.Error as err:
                print(f"Error: {err}")
                connection.rollback()  # 出错时回滚事务
                return None
            finally:
                cursor.close()
                # connection.close()
                # print('MySQL connection is closed')

    @staticmethod
    def insert_many(connection, query, params_list):
        """
        批量插入数据
        :param connection: MySQL 连接对象
        :param query: SQL 插入语句
        :param params_list: 包含多条数据的参数列表
        """
        if connection.is_connected():
            print('Connected to MySQL database')
            # 创建一个 cursor 对象，用于执行 SQL 语句
            cursor = connection.cursor()
            try:
                # 执行批量插入的 SQL 语句
                cursor.executemany(query, params_list)
                # 提交事务
                connection.commit()
                print(f"Data inserted successfully. {cursor.rowcount} rows affected.")
            except mysql.connector.Error as err:
                print(f"Error: {err}")
                connection.rollback()  # 出错时回滚事务
            finally:
                cursor.close()
                print('MySQL cursor is closed')

    @staticmethod
    def query_data(connection, query, params=None):
        """
        执行查询操作
        :param connection: MySQL 连接对象
        :param query: SQL 查询语句
        :param params: SQL 查询参数
        :return: 查询结果（tuple），如果没有结果返回 None
        """
        if connection.is_connected():
            print('Connected to MySQL database')
            cursor = connection.cursor()
            try:
                cursor.execute(query, params)  # 执行查询
                result = cursor.fetchall()  # 获取所有查询结果
                return result
            except mysql.connector.Error as err:
                print(f"Error: {err}")
                return None
            finally:
                cursor.close()
                print('MySQL cursor is closed')

    @staticmethod
    def update_data(connection, query, params):
        """
        执行更新操作
        :param connection: MySQL 连接对象
        :param query: SQL 更新语句
        :param params: SQL 更新参数
        """
        if connection.is_connected():
            print('Connected to MySQL database')
            cursor = connection.cursor()
            try:
                cursor.execute(query, params)  # 执行更新
                connection.commit()  # 提交事务
                print(f"{cursor.rowcount} rows affected.")
            except mysql.connector.Error as err:
                print(f"Error: {err}")
                connection.rollback()  # 出错时回滚事务
            finally:
                cursor.close()
                print('MySQL cursor is closed')