本篇内容介绍了“如何用Python程序实现向MySQL存放图片”的有关知识，在实际案例的操作过程中，不少人都会遇到这样的困境，接下来就让小编带领大家学习一下如何处理这些情况吧！希望大家仔细阅读，能够学有所成！
我们提供的服务有：成都网站设计、成都网站建设、微信公众号开发、网站优化、网站认证、霞山ssl等。为近千家企事业单位解决了网站和推广的问题。提供周到的售前咨询和贴心的售后服务，是有科学管理、有技术的霞山网站制作公司
环境
Python 3.7.4
pymysql
8.0.11 MySQL Community Server
读取图片
以二进制格式读取图片
with open("./test.jpg", "rb") as file:
image = file.read()创建存放图片的表
存放图片字段的属性为longblog，即long binary large object
def create_image_table(self):
sql = 'create table if not exists picture ( \
image longblob);'
try:
self.cursor.execute(sql)
self.connection.commit()
except pymysql.Error:
print(pymysql.Error)
存入MySQL
将二进制格式的图片数据存入MySQL
def insert_image(self, image):
sql = "insert into picture(image) values(%s)"
self.cursor.execute(sql, image)
self.connection.commit()
保存MySQL查询得到的图片数据为图片
以二进制的格式写出图片
def get_image(self, path):
sql = 'select * from picture'
try:
self.cursor.execute(sql)
image = self.cursor.fetchone()[0]
with open(path, "wb") as file:
file.write(image)
except pymysql.Error:
print(pymysql.Error)
except IOError:
print(IOError)
实现代码
import pymysql
class Database():
'''
Description:
database demo to store image in MySQL RDBMS
Attributes:
None
'''
def __init__(self):
self.connection = pymysql.connect(host='',user='',passwd='',db='',charset='utf8')
self.cursor = self.connection.cursor()
'''
Description:
create table to store images
Args:
None
Return:
None
'''
def create_image_table(self):
sql = 'create table if not exists picture ( \
image longblob);'
try:
self.cursor.execute(sql)
self.connection.commit()
except pymysql.Error:
print(pymysql.Error)
'''
Description:
insert image into table
Args:
image:
image to store
Returns:
None
'''
def insert_image(self, image):
sql = "insert into picture(image) values(%s)"
self.cursor.execute(sql, image)
self.connection.commit()
'''
Description:
get image from database
Args:
path:
path to save image
Returns:
None
'''
def get_image(self, path):
sql = 'select * from picture'
try:
self.cursor.execute(sql)
image = self.cursor.fetchone()[0]
with open(path, "wb") as file:
file.write(image)
except pymysql.Error:
print(pymysql.Error)
except IOError:
print(IOError)
'''
Description:
destruction method
Args:
None
Returns:
None
'''
def __del__(self):
self.connection.close()
self.cursor.close()
if __name__ == "__main__":
database = Database()
# read image from current directory
with open("./test.jpg", "rb") as file:
image = file.read()
database.create_image_table()
database.insert_image(image)
database.get_image('./result.jpg')
测试结果
“如何用Python程序实现向MySQL存放图片”的内容就介绍到这里了，感谢大家的阅读。如果想了解更多行业相关的知识可以关注创新互联网站，小编将为大家输出更多高质量的实用文章！
文章名称：如何用Python程序实现向MySQL存放图片
本文URL：
http://cdxtjz.cn/article/ihdgod.html
