mysql python image 图像存储读取

  • Z时代
  • 2024-01-10
  • 分类：综合

python

最近做一些数据库调研的工作，目标是实现影像更快的入库、出库、查询，并实现并行访问等操作。

将结果总结成一个mysqlImg类。

关于mongodb的图像存储，参见http://www.cnblogs.com/bigbigtree/p/3242483.html

关于mysql&python的问题和mysql官方链接python的API总结，参见

http://www.cnblogs.com/bigbigtree/p/3246638.html

http://www.cnblogs.com/bigbigtree/archive/2013/08/08/3246718.html

http://www.cnblogs.com/bigbigtree/archive/2013/08/09/3247477.html

http://www.cnblogs.com/bigbigtree/p/3248126.html

mysqlImg代码如下，

 1 #coding=UTF-8
 2 '''
 3 Created on 2013-8-7
 4 
 5 @author: tree
 6 '''
 7 __metaclass__ = type
 8 
 9 import mysql.connector
10 import os
11 import time
12 
13 
14 class mysqlImg(object):
15     """mysqlImg is a class for inserting image     
16     """
17     def __init__(self):
18         
19         self.__filelist=[]    
20         self.__config = {
21                   'user':'root',
22                   'password':'******',
23                   'host':'localhost',
24                   'database':'imgdb'}      
25         
26 
27     def __dirwalk(self,dir,topdown=True):
28         """traverse the documents of self.__dir and save in self.__filelist
29         """
30         sum=0
31         self.__filelist.clear()
32         
33         for root,dirs,files in os.walk(dir,topdown):
34             for name in files:
35                 sum+=1
36                 temp=os.path.join(root,name)
37                 self.__filelist.append(temp)
38         print(sum)      
39             
40         
41     def insertImg(self,imgpath,dbname=None):
42         """insert images in mysql
43         """
44         if dbname != None:
45             self.__config['database']=dbname
46             
47         self.__dirwalk(imgpath)
48         
49         sum=0
50         tStart=time.time()
51         
52         self.__cnx=mysql.connector.connect(**self.__config)
53         cur=self.__cnx.cursor()
54         cur.execute("DROP TABLE IF EXISTS pyramid")
55         cur.execute("CREATE TABLE pyramid(IdImg INT(11) PRIMARY KEY AUTO_INCREMENT,\
56                     NameImg VARCHAR(30),\
57                     DataImg LONGBLOB NOT NULL)")
58                       
59         try: 
60             for fi in self.__filelist:
61                 sum+=1   
62                 print(sum)                    
63                 myimg = open(fi,'rb') 
64                 data=myimg.read()
65             
66                 insertString='INSERT INTO pyramid(NameImg,DataImg) VALUES(%s,%s)'
67                 args=(fi,data)
68                 cur.execute(insertString,args)
69                 myimg.close()    
70         finally:
71             tEnd=time.time()
72             print ("It cost %f sec" % (tEnd - tStart))
73             self.__cnx.commit()
74             self.__cnx.close()
75         
76     #get image by filename
77     def getbyname(self,filename,savepath):
78         """get img from mysql by NameImg
79         """
80         if len(filename) < 1:
81             raise TypeError("filename must not be None")
82         if len(savepath) < 1:
83             raise TypeError("dir must be an string of directory")        
84 
85         self.__cnx=mysql.connector.connect(**self.__config)      
86         cur=self.__cnx.cursor()
87         
88         try:
89             selectString="SELECT DataImg FROM pyramid WHERE NameImg = %s"
90             cur.execute(selectString,(filename,)) 
91             
92             data=cur.fetchone()[0]
93             imgout=open(savepath,'wb')
94             imgout.write(data)              
95         finally:
96             self.__cnx.close()
97             imgout.close()

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