使用Python進行文件的分割與合併

使用Python來進行文件的分割與合併是非常簡單的。

python代碼如下：

splitFile--將文件分割成大小爲chunksize的塊；

mergeFile--將衆多文件塊合併成原來的文件；

# 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 讀二進制文件
		try:
			while 1:
				chunk = inputfile.read(self.chunksize)
				if not chunk: #文件塊是空的
					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):
		'將src路徑下的所有文件塊合併，並存儲到des路徑下。'
		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報告作業.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()

程序註釋部分是使用類的對象的方法。