MySQL数据库中存储图片和读取图片的操作代码

CREATE TABLE images (
    id INT AUTO_INCREMENT PRIMARY KEY,
    name VARCHAR(255) NOT NULL,
    image LONGBLOB NOT NULL
);

INSERT INTO images (name, image) VALUES ('example.jpg', LOAD_FILE('/path/to/example.jpg'));

SELECT image FROM images WHERE id = 1;

SELECT image FROM images WHERE id = 1 INTO OUTFILE '/path/to/your/output.jpg';

import mysql.connector

# 连接到数据库
conn = mysql.connector.connect(
    host='localhost',
    user='your_username',
    password='your_password',
    database='your_database'
)
cursor = conn.cursor()

# 读取图片文件
with open('/path/to/example.jpg', 'rb') as file:
    binary_data = file.read()

# 插入图片到数据库
sql = "INSERT INTO images (name, image) VALUES (%s, %s)"
val = ('example.jpg', binary_data)
cursor.execute(sql, val)
conn.commit()

# 关闭连接
cursor.close()
conn.close()

import mysql.connector
from io import BytesIO
from PIL import Image

# 连接到数据库
conn = mysql.connector.connect(
    host='localhost',
    user='your_username',
    password='your_password',
    database='your_database'
)
cursor = conn.cursor()

# 从数据库中读取图片
sql = "SELECT image FROM images WHERE id = 1"
cursor.execute(sql)
result = cursor.fetchone()
image_data = result[0]

# 使用 PIL 库显示图片
image = Image.open(BytesIO(image_data))
image.show()

# 关闭连接
cursor.close()
conn.close()

CREATE TABLE images (
    id INT AUTO_INCREMENT PRIMARY KEY,
    name VARCHAR(255) NOT NULL,
    path VARCHAR(255) NOT NULL
);

INSERT INTO images (name, path) VALUES ('example.jpg', '/path/to/example.jpg');

SELECT path FROM images WHERE id = 1;

import os
import mysql.connector

# 连接到数据库
conn = mysql.connector.connect(
    host='localhost',
    user='your_username',
    password='your_password',
    database='your_database'
)
cursor = conn.cursor()

# 保存图片到文件系统
file_path = '/path/to/save/example.jpg'
with open('/path/to/example.jpg', 'rb') as source_file:
    with open(file_path, 'wb') as dest_file:
        dest_file.write(source_file.read())

# 插入图片路径到数据库
sql = "INSERT INTO images (name, path) VALUES (%s, %s)"
val = ('example.jpg', file_path)
cursor.execute(sql, val)
conn.commit()

# 关闭连接
cursor.close()
conn.close()

import mysql.connector
from PIL import Image

# 连接到数据库
conn = mysql.connector.connect(
    host='localhost',
    user='your_username',
    password='your_password',
    database='your_database'
)
cursor = conn.cursor()

# 从数据库中读取图片路径
sql = "SELECT path FROM images WHERE id = 1"
cursor.execute(sql)
result = cursor.fetchone()
image_path = result[0]

# 使用 PIL 库显示图片
image = Image.open(image_path)
image.show()

# 关闭连接
cursor.close()
conn.close()