使用Python进行文件的分割与合并

使用Python来进行文件的分割与合并是非常简单的。

python代码如下：

splitFile--将文件分割成大小为chunksize的块；

mergeFile--将众多文件块合并成原来的文件；

# coding=utf-8
import os,sys
reload(sys)
sys.setdefaultencoding('UTF-8')

class FileOperationBase:
def __init__(self,srcpath, despath, chunksize = 1024):
self.chunksize = chunksize
self.srcpath = srcpath
self.despath = despath

def splitFile(self):
'split the files into chunks, and save them into despath'
if not os.path.exists(self.despath):
os.mkdir(self.despath)
chunknum = 0
inputfile = open(self.srcpath, 'rb') #rb 读二进制文件
try:
while 1:
chunk = inputfile.read(self.chunksize)
if not chunk: #文件块是空的
break
chunknum += 1
filename = os.path.join(self.despath, ("part--%04d" % chunknum))
fileobj = open(filename, 'wb')
fileobj.write(chunk)
except IOError:
print "read file error\n"
raise IOError
finally:
inputfile.close()
return chunknum

def mergeFile(self):
'将src路径下的所有文件块合并，并存储到des路径下。'
if not os.path.exists(self.srcpath):
print "srcpath doesn't exists, you need a srcpath"
raise IOError
files = os.listdir(self.srcpath)
with open(self.despath, 'wb') as output:
for eachfile in files:
filepath = os.path.join(self.srcpath, eachfile)
with open(filepath, 'rb') as infile:
data = infile.read()
output.write(data)

#a = "C:\Users\JustYoung\Desktop\unix报告作业.docx".decode('utf-8')
#test = FileOperationBase(a, "C:\Users\JustYoung\Desktop\SplitFile\est", 1024)
#test.splitFile()
#a = "C:\Users\JustYoung\Desktop\SplitFile\est"
#test = FileOperationBase(a, "out")
#test.mergeFile()

程序注释部分是使用类的对象的方法。