mysql保存图片案例

CREATE TABLE images (
    id INT AUTO_INCREMENT PRIMARY KEY,
    name VARCHAR(255),
    image BLOB
);

import mysql.connector
from mysql.connector import Error

def save_image_to_db(image_path, image_name):
    try:
        connection = mysql.connector.connect(host='localhost',
                                             database='testdb',
                                             user='root',
                                             password='password')

        cursor = connection.cursor()

        with open(image_path, 'rb') as file:
            binary_data = file.read()

        insert_query = "INSERT INTO images (name, image) VALUES (%s, %s)"
        cursor.execute(insert_query, (image_name, binary_data))
        connection.commit()

        print("Image saved successfully.")

    except Error as e:
        print(f"Error: {e}")

    finally:
        if connection.is_connected():
            cursor.close()
            connection.close()

# 示例调用
save_image_to_db('path/to/image.jpg', 'example_image')

import mysql.connector
from mysql.connector import Error
import os

def get_image_from_db(image_id, output_path):
    try:
        connection = mysql.connector.connect(host='localhost',
                                             database='testdb',
                                             user='root',
                                             password='password')

        cursor = connection.cursor()

        select_query = "SELECT image FROM images WHERE id = %s"
        cursor.execute(select_query, (image_id,))
        record = cursor.fetchone()

        if record:
            with open(output_path, 'wb') as file:
                file.write(record[0])
            print("Image retrieved successfully.")
        else:
            print("Image not found.")

    except Error as e:
        print(f"Error: {e}")

    finally:
        if connection.is_connected():
            cursor.close()
            connection.close()

# 示例调用
get_image_from_db(1, 'path/to/output_image.jpg')